JPS60220328A - Printer system - Google Patents

Abstract

PURPOSE:To obtain a printer system where a stable photometric value is always attained independently of a periodical variance of a lighting current, by sampling a light reception signal synchronously with the lighting current which is changed at a prescribed period. CONSTITUTION:A photographic paper 12 from a winding shaft 10 is exposed to light by a color printer system, and this photographic paper 12 is developed by a developing machine 14. An exposure lamp 16 for this exposure is lit by a lighting current 100 supplied from a main circuit 20 of a power source, and this main circuit 20 has a thyristor as a semiconductor current control element which converts an AC current 102 supplied from a commercial power source 22 to the lighting current 100. A photodetector 34 whose visual field set to only the exposure lamp 16 is provided, and its light reception signal 110 is supplied to a processing circuit 26, and the processing circuit 26 functions as a lighting current control circuit which controls the lighting current 100 in accordance with the light reception signal 110. The exposure lamp 16 is so controlled by the photodetector 34 that the signal 110 is sampled at the timing synchronized with power supply and the quantity of light of the lamp 16 becomes a target value when the lighting state of the lamp 16 is stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a printer system in which an exposure lamp 11 is turned on by a current that changes at a predetermined period.

[Background Art] In printer systems, photometry is performed using a light receiver that receives light source light from an exposure lamp.
The exposure amount is determined based on the photometric value.

Although it is possible to use a DC stabilized power source as the exposure power source for lighting the exposure lamp, the system becomes expensive, so AC power sources have also been conventionally used.

In this type of printer system, the lighting current of the arranged light lamp is obtained by stepping down the AC voltage of the commercial power supply using a variable transformer, and the fluctuation period is several tens of meters.
5 ec, the photometric signal is obtained by integrating the light reception value of the photoreceiver over a period of several hundred m5 ec.

However, when the calculation for determining the exposure amount from the photometric value is performed digitally using a processing device such as a microcomputer, the sampling period of the photoreceptor is limited to several tens of meters5ec or less, and sampling is performed instantaneously. Therefore, there is a problem in that the exposure amount fluctuates in response to periodic changes in the lighting current, resulting in variations in print finish.

[Object of the invention] The present invention has been made in view of the above-mentioned conventional problems, and
The purpose is to provide a printer system that can always obtain stable photometric values regardless of periodic changes in lighting current.

[Structure of the Invention] In order to achieve the above object, the present invention is characterized in that the sampling of the light reception signal is performed in synchronization with a lighting current that changes at a predetermined period.

For this reason, the printer system according to the present invention includes an exposure power supply that supplies a lighting current that changes at a predetermined cycle to an exposure lamp;
A light receiver that receives the light source light from the exposure lamp, a phase detector that detects the phase of the lighting current, and a light receiving signal of the light receiver is sampled in synchronization with the phase detection signal, and the photometric value of the light source light is determined based on the light receiving signal sampling value. It is characterized by having a photometer (1 arithmetic circuit) that can be used to measure the photometry.

In the system described in -1-2, the exposure power source includes a main circuit including a semiconductor current control element that converts alternating current into the lighting radio wave by phase control, a switching signal generation circuit that performs switching control of the semiconductor current control element, The phase detector can be constructed using a comparator that detects the phase of the alternating current five times, a zero cross detector, etc.

[Embodiments of the Invention] Hereinafter, embodiments of a printer system according to the present invention will be described based on the drawings.

In FIG. 1, photographic paper 12 from a winding shaft 10 is exposed to light by the present color printer system, and the exposed photographic paper 12 is supplied to a developing machine 14 for development processing.

This color printer system includes an exposure lamp 16 for exposing the photographic paper 12j, and the exposure lamp 16 is mounted within a lamp reflector 18.

The fog light lamp 16 is lit by a lighting current 100 supplied from a main circuit 20 of an exposure power supply, and this main circuit 20 is powered by a lighting current 100 supplied from a commercial power supply 22).
A thyristor is used as a semiconductor current control element to convert 2 to 1004 lighting current. Note that a large power transistor can also be used in place of the thyristor.

The thyristor is supplied with a switching signal 104 (commutation signal) for its switching (commutation here).
is supplied from the switching signal generation circuit 24,
A switching control signal 106 is supplied to the switching signal generating circuit 24 from the processing circuit 26 . Note that this processing circuit 26 can function as a photometric value calculation circuit that calculates the photometric value of the light source light.

Furthermore, an alternating current 102 is used to detect the phase of the lighting current lOO.
A phase detector 28 is provided for detecting the phase of
The phase detection signal 108 is supplied to the processing circuit 26.

In this embodiment, a level detector is constructed using an inverting operational amplifier 30 as shown in FIG. 2, or a level detector is constructed using an inverting operational amplifier 32 as shown in FIG. A zero-crossing detector is used as this phase detector 28.

Further, in FIG. 1, a light receiver 34 whose field of view is only the exposure lamp 16 is provided, and its light reception signal 110 is supplied to the processing circuit 26. This processing circuit 26 can also function as a lighting current control circuit that controls the lighting current 100 according to the light reception signal 110.

Lamp reflector 1 for limiting the field of view of the light receiver 34
8 is formed with a detection window 36, through which the filament of the exposure lamp 16 is imaged onto the light receiving surface 1- of the light receiver 34 by an optical system 38.

In this embodiment, the lamp reflector 18 is constructed by forming a light reflecting layer on the parabolic inner surface of a transparent body formed in a substantially bowl shape with a parabolic inner surface, and the stacked window 36 is The light reflecting body is formed by applying a tape before forming the carcass and removing it after forming the tape, or by removing a part of the formed light reflecting body.

In addition, in FIG. 1, the amount and color of the light source light obtained by the exposure lamp 16 and lamp reflector 18 are adjusted by CC.
Filter 40 (Color compensating
g filter), and this CC
The filter 40 includes component color filters 42A (red), 42B (green), and 42C (blue) that are moved forward and backward with respect to the exposure optical path.

These component color filters 42A, 42B, and 42C are moved by a filter driving device, and in FIG.
Step motors 44A, 44B each drive 42C,
These step motors 44A, 44B, and 44C are supplied with drive current from a drive power source 46, and are controlled by a processing circuit 26.

Further, the light source light adjusted by the CC filter 40 described in -I- is irradiated onto a negative film 50 via a mirror box 48, and this negative film 50 is set on a film moving stage 52.

A reference negative film 54 is also set on this film moving table 52, and the reference negative film 54 is connected to a solenoid 5.
By driving the film moving stage 52 at step 6, the film can be moved to the exposure optical path "2" in place of the negative film 50.

Note that a drive current is supplied to the solenoid 56 from the drive power source 46.

Further, the negative image on the negative film 50 is formed on the photographic paper 124- by an exposure lens 58 via a shutter 60, and the shutter 60 is driven by a solenoid 62. Note that a drive current is supplied to the solenoid 62 from a drive power source 46.

The frame-by-frame feeding of the photographic paper 12 is performed by rollers 64A and 64B, and the servo motor 66 serving as the drive source is driven by the drive power source 46.

Further, the light receiving units 68A, 68B, 68G, 68D, 68E, 68F included in the negative film transmitted light measuring device receive the transmitted light of the negative film 50 or the reference negative film 54.
These are arranged around a perpendicular line passing through the center O of the negative film 50, and are each directed toward the center O as shown in FIG.

These light receiving units 68A, 68B, 68C are shown in FIG.
The placement positions of 168D, 68E, and 68F are shown,
light receiving unit) 68A, 68B, 68C and light receiving unit 6
8D, 68E, and 68F are arranged on both sides of the negative film 50 (reference negative film 54), respectively.

and light receiving unit) 68A and light receiving unit 68F, light receiving unit 68B and light receiving unit) 68E, light receiving unit) 6
8C: and light receiving unit 68D are each paired and arranged symmetrically with respect to the center 0 of the negative film 50.

The light receiving unit 68A and the light receiving unit 68F are composed of a component color light receiver 70B that detects only the front of the component color and a component color light receiver 70G that detects only the edge of the component color.
The light receiving unit 68E consists of a component color light receiver 70B and a component color light receiver 70R that detects only the component color light field, and the light receiving unit 68C and the light receiving unit 68D form a component color light receiver 70.
B and a component color receiver 70G.

Furthermore, the light receiving unit 68A and the light receiving unit 68F, the light receiving unit 68B and the light receiving unit 68E, and the light receiving unit 68
C and the component color receivers 70 in the light receiving unit 68D are also arranged symmetrically.

Note that a negative film transmitted light measuring device can be configured as shown in FIG. 6, and in this device, a light receiving unit 68A,
68B, 68C168D, 68E, and 68F are component color receivers 70R170G.

70B, and the light receiving units 68 for each month and their component color light receivers 70 are arranged symmetrically with respect to the center 0.

Further, each light receiver 70 is provided with a dedicated optical system that forms a negative image on the light receiving surface.

In FIG. 1, a keyboard 72 is connected to the processing circuit 26, and a display 74 that can also function as an alarm is connected to the drive power source 46.

The present embodiment has the above configuration, and its operation will be explained below.

First, the power is turned on. However, when installing the system or performing maintenance management, a so-called set-up is then performed.

After the power is turned on, the AC current lO2 from the AC power supply 22 is directly supplied to the main circuit 20 without going through a transformer or the like.

Furthermore, when setup is not performed, light source control, light source management, photometry, light adjustment, exposure, and development management are performed as appropriate.

Figures 7, 8, and 9 show the processing procedure for light source control, Figures 1O, 11, and 12 show the processing procedure for light source management, and Figure 13 shows the processing procedure for light source control. The processing procedure for signal sampling is shown in FIG. 14, the processing procedure for photometry is shown in FIG. 15, the processing procedure is shown in FIG. 16 for light adjustment, and FIGS. 17 and 18 show processing procedures for development management, and light source control, light source management, photometry, light adjustment, exposure, and development management will be explained below in this order.

First of all, regarding light source control, see Figures 7, 8, and 9 at the beginning of Gifu.
After explaining the figure, the operation will be summarized and explained. When the power is turned on, the light source startup routine shown in FIG.

If it is determined in step 200 that the timer has not been started, the timer is started in step 202, and if a positive determination is made in step 200 and the timer is started in step 202. When the timer has expired, the process proceeds to step 204, where it is determined whether the timer has timed up.

When it is determined in this step 204 that the timer has not timed up, it is determined in step 206 whether or not an initial firing angle has been set, and if the initial firing angle has not been set, it is set in step 208. It will be done.

Then, in step 210, the firing club is set,
When this process is completed, the process returns to step 204.

If it is determined in step 204 that the timer has timed up, the routine proceeds to step 212, where the timer flag is set, and this routine is ended.

FIG. 8 shows a routine for controlling the light source.
First, the firing flag is read in step 214.

In the next step 216, it is determined whether or not the lighted club is set. When it is determined in step 216 that the lighted club is set, the process proceeds to step 218, where the lighted club is set. be done.

Furthermore, in step 220, it is determined whether or not the timer flag is set.
If it is determined that the timer flag is set in step 222, the light reception timing flag is read.

Further, in step 224, it is determined whether or not this light reception timing flag is set, and this light reception timing flag has the above-mentioned phase detectability':! The cent is reset in synchronization with f108.

When it is determined in step 224 that the light reception timing flag is set, the light reception signal 110 detected by the light receiver 34 is sampled in step 226.

In this way, the sampling of the light reception signal 110 is performed in synchronization with the lighting current 1OO1, that is, the light source fluctuation, which fluctuates periodically, and is always performed at a constant timing, so that the sampling value is always accurate despite this fluctuation. is obtained.

Then, in step 228, this sampling value is subtracted from a pre-given reference value, and in step 230, it is determined whether the deviation is within a pre-set tolerance range.

If the deviation is within the allowable range in step 230, steps 222, 224, 226, and 228 are simply repeated, but if it is determined that the deviation is outside the allowable range, a new target firing angle is set in step 230. 232.

Furthermore, in step 234, the presence or absence of a light-off command input by operating the key port 72 is monitored, and if it is determined in step 234 that a light-off command has not been input, the process returns to step 222, but the light-off command is When it is determined that the input signal has been input, the process advances to step 236, where a light-off flag is set, and this routine is ended.

FIG. 9 shows a routine for changing the target firing angle and controlling the light source on and off.
At 38, it is monitored whether or not there is a human effort to instruct the lighting to start.

When it is determined in step 238 that the lighting start command is not manually input, the target firing angle is set to 0 in step 240, and the exposure lamp 16 is driven to light at the target firing angle.

Therefore, in this case, from the main circuit 20 to the exposure lamp 16
Since the lighting current 100 is not supplied to the exposure lamp 16, the exposure lamp 16 is not turned on.

If it is determined in step 238 that the lighting start command has been input, the process proceeds to step 244, where it is determined whether or not the calculated firing angle that was calculated in step 230 is present.

If it is determined in step 244 that there is no calculated firing angle, the process proceeds to step 246, where the initial target firing angle is set as the target value, and the lighting type f of that firing angle is set.
In it 100, exposure lamp 16 is turned on in step 242.

Therefore, in this case, at the initial target firing angle, the exposure lamp 16
is lit.

Furthermore, if it is determined in step 244 that there is a calculated firing angle, this calculated firing angle is set as the target value and learned (step 248).
, the exposure lamp 16 is turned on in step 242 at that firing angle.

Thereafter, in step 250, the presence or absence of a lights-out command is monitored. If the lights-out command has not been input, the process returns to step 244, and when the lights-out command has been input, this routine is ended.

The operations related to the above light source control will be summarized and explained below.

First, after the electric sign is input by operating the keyboard 72,
If the lighting start command has not yet been issued, the firing angle is set to O (step 24o), and the exposure lamp 16 is brought into a lighting ready state.

Then, a timer is started at the same time as the power is turned on (step 202), the ignition angle is set (step 208), and a lighting start command is issued.

Upon generation of this lighting start command, an initial target firing angle is set as a target value (step 246), and the exposure lamp 16 is lit at that firing angle (step 242).

After that, when the lighting condition Fi of the exposure lamp 16 becomes stable and the timer times out (step 2.4), the signal 110 is sampled at a timing synchronized with the power supply (step 226), and the accurate sampling value and reference value are determined. are matched (step 228), and the target firing angle is corrected in the direction in which the light amount of the exposure lamp 16 matches the reference value (steps 230, 232, 24 onwards).
When the exposure lamp 16 reaches a stable lighting state after lighting as shown in 2, the light amount of the exposure lamp 16 is monitored by the light receiver 34, and the lighting control of the exposure lamp 16 is performed so that the light amount becomes the target light amount. It should be noted that the lighting current ioo in this embodiment is controlled like a ramp function at the time of lighting, so that the initial target firing angle is increased during that time according to its functional characteristics.

During the second light source control operation, when it is confirmed that the exposure lamp 16 has entered a stable lighting state by setting the timer flag in step 252 of Fig. 1θ, various initial data are set in step 254. Then, in step 256, a light source management flag is set.

By setting this light source management flag, the following light source management is started, and this light source management causes each light receiving unit 68A, 6
8B, 68C168D, 68E.

The CC filter 40 adjusts the amount of incident light to the 68F so that it falls within the linear detection operation range regardless of differences in pace density depending on the type of negative film 50, dust adhesion, etc.

Therefore, each light receiving unit) 68A, 68B, 68C16
8D, 68E, and 68F are not saturated due to an excessive amount of incident light, and their signal-to-noise ratios are not degraded, ensuring good detection operations.

For this reason, this light source management is performed each time a set of channel data is performed, such as when the negative film 5o is replaced, and is not performed for each frame.

The light source management in I- below is performed by driving the CC filter 40 in the following manner.

Here, after explaining FIGS. 11 and 12, the operation will be summarized.

In FIG. 11, when it is confirmed in step 258 that the light source management flag is set, the process proceeds to step 260, and the respective positions of the component color filter pieces 42A, 42B, 42C and the light receiving units 68A, 68B, 68C, 168D, 6
8B, 68F (7) It is determined whether a reference characteristic as shown by characteristic 500 in FIG. 19 showing the relationship with the amount of received light has been determined in advance.

This reference characteristic is used to make the light source light from the exposure lamp 16 have a predetermined color and shape, and as described below, the light receiving units 68A, 68B, 68C168
D, 68E, 68F detection signals move the component color filter pieces 42A, 42B, 42 to the positions obtained from this reference characteristic.
C is driven, and the light source light from the exposure lamp 16 is adjusted to a predetermined color and a predetermined height that falls within the above-mentioned linear detection operation range.

In this way, the above-mentioned reference characteristic is necessary for this light source management, and if it is determined in step 260 that this reference characteristic does not exist, in step 262, the presence or absence of the reference characteristic measured up to that point is determined. is determined.

If it is determined in this step 262 that there is a reference characteristic that has been measured up to that point, that reference characteristic is used, but if it is determined that there is no reference characteristic that has been measured, step 262 At 264, the reference characteristics are measured.

When the reference characteristics prepared or measured in advance are obtained in this way, the solenoid 56
The film moving stage 52 is driven, and the reference negative film 54 is set on the exposure optical path -L.

In the next step 268, the component color filter piece 42A
, 42B, and 42C are each driven to a predetermined target position, and in step 270, the light receiving units 68A, 68B
, 68G, 68D, 68E, and 68F are sampled and photometry is performed.

This photometry is performed according to the routine shown in FIG. 13, in which a photometry timing flag is first read in step 272, step 274 determines whether or not the photometry timing flag is set, and step 276 determines whether the photometry timing flag is set. When setting the photometry timing flag, the light receiving unit) 68A, 68B, 68C168D, 68E, 68F
Each light reception signal is sampled and a photometric value is determined.

Here, the photometry timing flag is set and reset in synchronization with the phase detection signal 108 in the same way as the light reception timing flag described above, and for this reason, an accurate sampling value is always obtained regardless of the periodically fluctuating light source. It has been obtained.

When photometry is performed in step 270 in this manner, it is determined in steps 278 and 280 of FIG. 11 whether the photometry value is within a predetermined tolerance range.

If it is determined in steps 278 and 280 that the photometric value is outside the allowable range, the process proceeds to step 282, where the deviation of the photometric value from the center value of the allowable range is calculated.

Then, in step 284, the corrected movement amount of the component color filter pieces 42A, 42B, and 42C is calculated from the deviation, and in step 286, the drive target position of the CC filter 40 is changed based on this corrected movement amount, and learning thereof is performed.

When the process of step 286 is completed, the step 2
Returning to 68, if it is determined in steps 278 and 280 that the photometric value is within the allowable range, the photometric value at that time is set in step 288, and the characteristic including this photometric value and the target position is set. A translated reference characteristic is learned. As a result, this reference characteristic that has been translated in parallel will be used thereafter.

Thereafter, in step 290, the light source management flag is reset and the photometry flag is set, and the routine shown in FIG. 11 is ended.

Next, the procedure of the characteristic measurement process performed in step 264 will be explained using FIG. 12.

First, in step 292, the reference negative film 54 is set in the exposure optical path 1- by driving the film moving table 52, and the component color filter piece 42 driven by the heartbeat is set as the component color filter piece 42A (step 294). ).

Note that this may be performed in an empty state where the reference negative film 54 is pulled out.

Then, in step 296, the component color filter piece 42
A, 42B, 42c are all fully open, step 298
In this case, only the component color filter piece 42A is closed by a predetermined amount.

Then, in step 300, photometry is performed according to the procedure shown in FIG. 13, and in step 302, the photometry value is stored.

Further, in step 304, it is determined whether or not the component color filter piece 42 being driven is fully closed. If it is determined that the component color filter piece 42 is not fully closed, the process returns to step 298, and the component color filter piece 42 is closed. The driving of 42, photometry, and storage of photometry values are repeated until the lens is fully closed.

If it is determined in step 304 that the component color filter piece 42 being driven is fully closed, the process proceeds to step 306 where it is determined whether the component color filter piece 42C is closed.

When the component color filter piece 42A is first driven in the closing direction, the component color filter piece 42C is opened in step 296, so a negative determination is made in step 306, and the process proceeds to step 308.

In step 308, it is determined whether the component color filter piece 42A is in a closed state, and when the component color filter piece 42A is first driven in the closing direction, the component color filter piece 42A is closed. Since it is closed, N
A fixed judgment is made. Then, in step 310, the component color filter piece 42B is set as the component color filter piece 42 to be driven next, and the process returns to step 296.

As a result, the component color filter piece 42B is driven from the fully open position to the fully closed position, during which photometry is performed and these photometric values are sequentially stored.

Thereafter, when the component color filter piece 42B is fully closed, a negative determination is made in step 308 (at this time, only the component color filter piece 42B is closed), and the process proceeds to step 312.

In this step 312, the last component color filter piece 42 to be driven is set as the component color filter piece 442C, and then the process returns to step 296 and the same process is repeated.

As a result, the component color filter piece 42C is driven from the fully open position to the fully closed position, during which time photometry is performed and the photometry values are sequentially stored.

When the component color filter piece 42C is fully closed and an affirmative determination is made in step 306, this routine ends.

In this way, the relationship between the positions of the component color filter pieces 42A, 42B, and 42C and the photometric values is stored, and the above-mentioned positional received light amount reference characteristic is formed by these.

Through the processing in steps 318, 320, 322, and 324, the CC filter 40 is controlled to a position where each light receiving unit 68 is within a region where linear operation is possible, and therefore each light receiving unit 68 is saturated with light passing input. There is no signal noise, and there is no reduction in signal noise.

As mentioned above, in this color printer system, C
This light source management is performed using a C filter 40.

The above operations can be summarized as follows. That is,
First, the reference characteristics of the negative film 50i to be set are prepared.

Next, the CC filter 40 is moved to a position where the light source light is optimal. Then, it is determined whether the light source light at that time is optimal.

At this time, if it is determined that the light source light is not optimal due to dust adhesion, lamp deterioration, etc., the CC
The general optimum position of the filter 40 is determined and learned, and the CC filter 40 is moved to the optimum position.

In this way, this color printer system automatically self-manages the light source so that the optimum light source light is always obtained regardless of the type of negative film.

Next, photometry will be explained. Note that this photometry is performed every frame because the optical properties of the negative film 40 change due to the heat of the light source.

In FIG. 14, in step 314, the CC filter 40
The component color filter pieces 4.2A, 42B, and 42C are each driven to the designated 1'' target position, and in step 316, photometry is performed according to the procedure shown in FIG. 13. Note that at this time, the negative film 52 is set on the exposure optical path.

Then, in step 318, it is determined whether the photometric value is larger than the maximum image of the allowable range. If it is determined that the photometric value is greater than the maximum image of the allowable range, step 318
At 20, component color filter pieces 42A, 42B, 42C
is driven in the closing direction.

Further, if it is determined in step 318 that the photometric value is not greater than the maximum value of the allowable range, step 3
In step 22, it is determined whether the photometric value is smaller than the minimum allowable range value.

If it is determined in step 322 that the photometric value is smaller than the minimum allowable range, then in step 324 the component color filter pieces 42A, 42B, and 42C are driven in the opening direction.

Then, when the processing in steps 320 and 324 is completed and a negative determination is made in step 322 that the photometric value is within the allowable range, the process advances to step 326 and again shown in FIG. Photometry is performed according to the procedure, and this routine ends.

As shown in -1- below, the CC filter 40 is also used for this photometry, and the photometry is performed using the component color filter pieces 42A,
42B and 42C are position-controlled to preset target positions (previously stored in memory or taught).

Next, the light adjustment performed subsequent to this photometry will be explained.

This light adjustment is performed by determining the target position of the CC filter 40 based on the exposure conditions given in advance and the measured value obtained by the photometry, and controlling the position of the CC filter 40 to this position to adjust the light source light used for exposure. This is for adjusting ζ1 and color.

In this color printer system, this dimming is performed as described below.

FIG. 15 shows the processing procedure, and in the first step 328, it is determined whether the photometric value obtained by the processing in step 326 is abnormal.

If it is determined in step 328 that the photometric value is abnormal, the process proceeds to step 330 where the display 74
A message to that effect is displayed, and this routine ends.

Note that causes of abnormal photometric values include a defective photoreceiver, a burnt out lamp, and the like.

Further, when it is determined in step 328 that the photometric value is not abnormal, steps 332, 334.
336.338.340.342, color correction processing, color key processing, density correction processing,
Exposure calculation processing (described later) consisting of density key processing, slope processing, and other processing is performed, and the components are calculated in step 344 based on the exposure amount determined by these processing and the exposure time set in advance. The target positions of the color filter pieces 42A, 42B, and 42C, that is, the amount and color of the exposure light source light are determined.

In this embodiment, standard data (for example, RGB balance) required for at least color correction processing (step 332) and density correction processing (step 336)
is given in advance as fixed data, and color correction processing (step 332), color key processing (step 334), and density correction processing (step 336) are performed.
), and in the density key processing (step 338), the exposure calculation processing is performed in accordance with data previously taught for each frame by the keyboard 72.

Further, the negative film 5o has photosensitive characteristics as shown in FIG. 20, but since these characteristics differ depending on the type, the slope processing (step 340) is performed using the optimum light source light for exposure according to these characteristics. It is done to obtain.

Therefore, this process can be applied to different types of negative film 50.
This is done every time a cent is earned.

In order to perform this process, in this color printer system, a curved slope characteristic 502 as shown in FIG. 21 is set in advance as fixed data, and the second
In Figure 1, this slope characteristic 50 is determined at step 34OA.
2 is read.

Then, in step 340B, the photometric value is set,
In step 340C, slope characteristic 50 is determined based on the photometric value.
The exposure meter is set from 2 onwards.

Furthermore, the target position of the CC filter 40 is calculated in step 344 based on the exposure amount and the exposure time.

In this embodiment, a plurality of photometric values and exposure results are stored in advance in the table as fixed data in correspondence with each other at predetermined intervals, and the measured value and the Jlll constant La in the table match. If not, the exposure result is estimated by performing interpolation processing.

In the next step 346, it is determined whether it is possible to move the component color filter pieces 42A, 42B, and 42C to the positions set as shown in H below.

In this step 346, the component color filter piece 4 is moved to that position.
If it is determined that the movement of the component color filter pieces 42A, 42B, and 42C is possible, the process proceeds to step 348, and the component color filter pieces
A, 42B, and 42C are actually driven to their respective target positions.

Then, in step 350, the light receiving units 68A, 68B, 68C168D,
Photometry is performed by 68E and 68F.

Further, when it is confirmed in step 352 that the exposure condition is satisfied based on the photometric value, this routine is ended.

Also, in step 346, the component color filter piece 42
If it is determined that any of the recorders A, 42B, and 42c cannot be moved to the [1 mark position], the following exposure content change process is performed.

If it is determined in step 346 that it is impossible to move the component color filter pieces 42A, 42B, and 42C to the target positions, the process proceeds to step 354, where the exposure time given in advance is changed in a stepwise manner. .

Then, in step 356, the relational expression between the exposure time and the exposure light amount is read out.

Further, in step 358, a change in the amount of exposure light is calculated based on the above relational expression using the exposure time changed in step 354.

Further, in step 360, the filter position once determined in step 344 is added with a correction amount corresponding to the exposure light amount change determined in step 358.

Then, in step 362, the position determined in step 360 is determined as the final target position, and the position determined in step 360 is determined as the final target position.
Return to 48.

Above step 346.354.356.358.360
．． The processing operation of H.362 is as follows.

The moving position of the CC filter 40 is determined in step 344, but as shown in FIG. 23, if the moving position P of any component color filter piece 42 exceeds the movable range (in the figure (exceeds in the opening direction by amount The exposure amount is determined according to the exposure amount, and a new target position is set based on this exposure amount.

First, in addition to the standard exposure time to, a plurality of correction exposure times are set in advance on the over side and under side (in FIG. 23, only times t1 and t2 are shown on the over side).

In addition to the exposure light 1-filter position characteristic corresponding to the standard exposure time to, a plurality of characteristics are prepared in advance corresponding to these correction exposure times (in addition, in FIG. 23, for the time to For time t1, only the characteristics C2, M2.Y2 are shown, and for time t2, only the characteristics C3, M3.Y3 are shown.) .

Here, 1. For example, if the target position exceeds the region in which it can be moved toward the O side by an amount of positive x as shown in FIG. 23 (step 346), the standard exposure time to is changed to the exposure time t2 ( step 354).

Next, the relational expression between the exposure time and the exposure light amount is read out (step 356), and the exposure light amount is determined from this relational expression using the −F arrangement light time t2, and the exposure light amount change corresponding to the exposure time change is calculated. (step 358).

Furthermore, characteristics C3, M3. A correction movement amount corresponding to the change in the exposure light amount is determined using Y3, and this correction movement amount is added to the target position up to that point in the closing direction (step 36
0).

The added value is then set as the new target position (
Step 362).

In this color printer system, as shown in FIG. The exposure amount is determined according to the exposure time, and a new target position is set according to this exposure amount.
It will be done.

On the other hand, if it is determined in step 352 that the exposure conditions are not satisfied based on the photometric value measured in step 350, this may be due to mechanical errors in the color printer system or due to the system itself. The photometric value does not match the target light intensity due to machine differences.

In this case, the process advances to step 364 and the subsequent filter position changing process is started.

Here, this filter position changing process will be explained using FIG. 19.

In the figure, the A11l light value Di (step 350) is obtained at the first position PO (step 344.362).

Initially, the photometric value D2 at that time was predicted to be 111 based on the characteristic 500.
11 (step 364).

Then, the difference between (+n D l and the value D2 is determined and the difference is added to the expected value D2, thereby determining the added value D3 (step 368).

Furthermore, the filter position Pi is determined from the characteristic 500 using this added value D3, and this position Pi is the position RPO
Instead, a new filter is set to [1 mark position] (step 372). Note that the target light amount for this target position Pi is indicated by a square D4 in the figure.

In this way, in this embodiment, the position (PO, DI) is included.
This filter position changing process is performed on the assumption that there is a new operating point P1, D4) at the characteristic 550J2, which is obtained by translating the characteristic 500 by the difference between the value Di and the value D2.

By performing this filter position change processing, the light source light can be adjusted to the target L regardless of mechanical errors, machine differences, etc.
Automatically self-managed to color.

As shown in U, this dimming is also performed by controlling the movement of the CC filter 40.

Next, the exposure performed subsequent to this light adjustment will be explained.

At step 354 in FIG. 16, the shutter 60 is first driven open.

In the next step 356, a timer for controlling the exposure time is immediately started, and in step 358, the time-up of the timer is monitored.

Furthermore, when it is determined in step 358 that the timer has timed up, the process proceeds to step 360 and the shutter 60 is immediately driven to close.

Then, in step 362, driving of the photographic paper 12 is started to increase the speed for exposure of the next frame, and in step 364, the end of the paper feeding is monitored.

When it is determined that there is a stubble, step 36
0, and the shutter 60 is immediately driven to close.

Then, in step 362, driving of the photographic paper 12 is started to increase the speed for exposure of the next frame, and in step 364, the end of the paper feeding is monitored.

Furthermore, when it is determined in this step 364 that the paper feeding has been completed, the process proceeds to step 366, and the component color filter pieces 42A and 42B of the CC filter 40 are
, 42C are moved to predetermined target positions, and preparations are made for the next frame exposure.

When the photographic paper 12 is exposed to light in the manner described above, the exposed photographic paper 12 is supplied to the developing machine 14 and developed. The developing conditions change.

This variation in developing conditions is absorbed in the present color printer system by performing the following developing management, thereby making the developing result of the developing device 14 constant.

J2 Two types of development management processing are prepared to absorb variations in development conditions, and one of these is selected. Next, the development management will be explained one by one.

First, when one development management is selected ξ, the operation start command is supplied to the processing circuit 26 by operating the key port 72, and the routine shown in FIG. 17 is started.

In the first step 374, the presence or absence of reference data, which will be described later, is determined. When it is determined in step 374 that reference data exists, that data is set in step 376.

Then, in step 378, the lighting of the exposure lamp 16 is controlled, and in step 380, the drive control of the CC filter 40 adjusts the light emitted by the exposure lamp 16, and the light source light is adjusted so that the target product has one color. be done.

Thereafter, a sample print is set on the filter moving table 52 and moved to the exposure optical path.

This sample print is prepared and prepared in advance as follows.

In FIG. 18, in step 382, the component color filter pieces 42A, 42B, and 42C are driven to predetermined target positions.

At this time, no negative film is set in the exposure optical path -1, and the filter moving table 52 is in an empty state.

Alternatively, a ring filter or ND filter (one in which the level of transmitted light is constant regardless of changes in input wavelength) is set on a filter moving table 52 and moved onto the exposure optical path.

The position of the CC filter 40 is determined by the filter moving table 52.
When the opening is empty, the exposure light is at a predetermined amount and becomes gray, and when a bare ring negative or an ND filter is used, the opening is at the fully open position.

In this way, the component color filter piece 42 of the CC filter 40 is
When A, 42B, and 42C are each driven to a predetermined position,
In step 384 17X of FIG. 18, the light source adjustment light or the transmitted light is photometered by the light receiving units 68A, 68B, 68C, 68D, 68E, and 68F. Note that this photometry is performed according to the procedure shown in FIG. 13 above.

In the next step 386, it is determined whether the measured value obtained in step 384 of 112 is in agreement with the target value, and in this step it is determined that the two do not agree. If so, proceed to step 388.

In this step 388, the deviation t'l of the photometric value with respect to the target value is output, and in the next step 390, the sleeve IE value regarding the drive 11 position of the CC filter 40 is calculated based on the deviation, and the process proceeds to step 382. return.

When it is confirmed in step 386 that the irradiation light on the photographic paper 12 has been adjusted to the target star and quality in this way,
At step 392, exposure similar to that described above is performed and one routine is completed.

After that, the photographic paper 12 that has been exposed 1-2 is transferred to the developing machine 1.
4 and is subjected to development processing, thereby obtaining the sample print.

Incidentally, when the sample print is set on the filter moving table 52, the sample print is cut in advance according to its size.

When the above sample print is set in the exposure optical path 1-, the photometry shown in FIG. 12 is performed in step 394 of FIG. 6
Measured by 8F.

Then, in the next step 396, the above step 39
The transmission density of the sample print measured in step 4 is compared with the reference data set in step 376.

This reference data is the transmission density of a print with a standard development finish, and is prepared in advance as fixed data, or the measurement results are taught.

Furthermore, in step 398, it is determined whether or not the exposure conditions can be corrected based on the comparison result of step 396, that is, the difference between the two transmission densities -j.

If it is determined in step 398 that the correction is possible, the process proceeds to step 400, and the exposure conditions are corrected ξ in accordance with the difference.

If it is determined in step 398 that correction is not possible, the process proceeds to step 402, where a warning is displayed on the display 74.

In this embodiment, the exposure conditions are corrected by correcting the exposure time, and as a result, the development conditions of the developing device 14 are absorbed in the present color printing system.

A case will be explained in which the next-side development management is selected.

In this case, the photographic paper 12 that has been exposed to standard light has been previously exposed to light, and this is developed in the developing machine 14 in advance. Note that this photographic paper 12 is supplied in advance from a print manufacturer or the like.

After this photographic paper 12 is set on the filter moving table 52 and moved to the fog light optical path 1-, the processes from step 394 onward in FIG. 17 are performed. Note that if the reference data is not prepared at that time, the standard developed print is set on the filter moving stage 52 and moved onto the exposure optical path, and then step 408 is performed to obtain the S standard. Data is measured.

By performing any of the development management described in I- above, variations in the development conditions of the developing device 14 are absorbed in the present printer system in the form of exposure time changes.

Furthermore, since exposure is performed in your development management,
In addition to fluctuations in development conditions, fluctuations in exposure conditions are also absorbed, and the final development condition becomes constant.

Further, according to the latter development management, only the development condition variation on the development Ia 14 side can be extracted, and therefore, the step 402
It can be confirmed that the alarm issued is caused only by changes in development conditions.

As explained below, according to this embodiment, the sampling of the light reception signal is performed in synchronization with the lighting wave that changes at a predetermined period, so that the signal is always stable despite periodic changes in the lighting current. It is possible to obtain photometric values.

As a result, it is possible to always obtain constant exposure results even with the same negative film.

In addition, the exposure power supply is provided with a main circuit that converts alternating current into lighting current using a spin lamp signal generation circuit, and the exposure lamp is lit by this main circuit without using a transformer, so the exposure power supply can be constructed at low cost. is possible.

Furthermore, since the phase detector can be configured with a simple comparator and zero-cross detector, the cost required for manufacturing the system does not increase.

Furthermore, according to this embodiment, a light receiver whose field of view is the exposure lamp is provided, and the light reception signal is used as a feedback signal to control the lighting of the exposure lamp, so it is possible to control the light source light to always have a constant light intensity. It is.

Furthermore, since the receiver's field of view is only the exposure lamp, the reflected light (several percent of the light source light) that is reflected by the CC filter and changes due to its movement does not enter the receiver. Even if the device is moved, it is possible to accurately control the amount of light distribution.

Furthermore, since it is possible to move the light receiver away from the exposure lamp, it is possible to use a semiconductor type light receiver that is highly sensitive and capable of accurate detection, thereby further increasing the precision of the light amount control. It becomes possible.

The optical system 38 in FIG. 1 uses a glass fiber 90 and a cylindrical body 92 whose inner peripheral surface is colored black, as shown in FIGS. 24, 25, and 26, respectively. It is also possible to use a mirror 94 in addition to the mirror 94.

Furthermore, according to this embodiment, a plurality of color light-receiving units are symmetrically arranged around a perpendicular line that is oriented toward medium heat and passes through the center of Nekafil J. It is possible to obtain the same exposure result even if there is a difference in the color receiver when S is rotated.

Further, since the component color light receivers provided in each color light receiving unit are also arranged symmetrically, it is possible to obtain a more constant exposure result.

In addition, when only an optical system common to each component color receiver is provided in front of the light receiving surface of each color light receiving unit 7), and when an image is partially formed on the light receiving surface of each component color receiver, each focusing It is preferable that a light mixer is provided on the color light receiving unit side of the light lens to allow uniform light to enter each component color light receiver.

According to this embodiment, light source management, photometry, and dimming are controlled by CC.
Since this is carried out only by controlling the movement of the filter, a cant filter and a scanner photometer are not used, making it possible to configure the system at low cost.

Furthermore, in light source management, it is possible to obtain light source light that has the standard brightness and color by controlling according to the reference characteristics.

Furthermore, since the standard characteristics described in 1-1 are automatically generated, there is no need to prepare them in advance. lI! Obtaining the characteristics is ηr ability.

Note that since the optimal reference characteristics are learned (step 28
8) It becomes possible to always obtain good source light.

Then, if extremely good exposure results are required, it is preferable to generate the reference characteristics using the reference negative film, and if the reference characteristics are generated without using the reference negative film (step 264), There is no need to prepare a reference negative film for each type of negative film, and the reference characteristics can be applied to all types of negative films.

Further, in photometry, since the CC filter is controlled to move to a predetermined position and photometry is performed, stable photometry values can be obtained.

And if you set multiple photometric positions of the CC filter,
It becomes possible to obtain more stable photometric results.

Note that since this photometry is performed in synchronization with fluctuations in the light source, accurate photometry values can be obtained, and this also applies to light source control and light source management, so that constant light source light can always be obtained.

In light adjustment, it is possible to obtain exposure light source light of any color, and it is also possible to improve the image quality, and furthermore, the speed can be improved.

Further, according to this embodiment, when the CC filter exceeds the dimming range during dimming, the exposure time is changed in a stepwise manner, and the characteristics C, M,
Since light control is performed based on Y, its characteristics C, M, Y
It becomes possible to incorporate reciprocity law failure into the image, and desired exposure results can be obtained. Furthermore, since the value is constant for each exposure time, this calculation becomes easy and the calculation speed can be improved.

Furthermore, according to this embodiment, even if the developing conditions change on the developing machine side due to liquid fatigue, etc., this is absorbed by the printer system side, so no experience is required to manage the developing machine in response to such changes, and therefore, it is difficult to handle the change. can be facilitated.

It is preferable to issue an alarm as in this embodiment when the printer system can no longer absorb the variation of the developing strip on the developing machine side.

According to this embodiment, the setup conditions such as standard exposure time, RGB balance, and slope characteristics are given as fixed data, so the system can be put into operation immediately upon installation by the user. Moreover, this cera-up can be easily performed without requiring any experience.

Furthermore, since slope processing can be performed using a curved slope characteristic 502 as shown in FIG. 21, an accurate exposure amount can be determined by matching this characteristic 502 with the photosensitive characteristic shown in FIG. It becomes possible.

In addition, this system automatically manages the light source, prevents changes in its characteristics and characteristics over time, and is fully corrected, so that the same operating state as the initial state can always be obtained.

[Effects of the Invention] As explained above, according to the present invention, the sampling of the light reception signal is performed in synchronization with the lighting current that changes at a predetermined period, so that the lighting signal is always stable despite periodic changes in the lighting current. It is possible to obtain a photometric value, and as a result, it is possible to always obtain a constant exposure result.

[Brief explanation of the drawing]

Figure 1 is an illustration of the overall configuration of the color printer system, Figures 2 and 3 are circuit configuration diagrams of the phase detector, Figure 4 is an illustration of the orientation direction of the light receiving unit, and Figures 5 and 6. Figure 7 is an explanatory diagram of the arrangement position of the light receiving unit and the Senbun color light receiver.
Figure 8, Figure 9, Figure 1O, Figure 11, Figure 12, Figure 1
Figure 3, Figure 14, Figure 15, Figure 16, Figure 17, Figure 1
Figure 8 is a flowchart for explaining the operation of the color printer system in Figure 1, Figure 19 is a graph of standard characteristics, and Figure 2
Fig. 0 is a photosensitive characteristic diagram of negative film, Fig. 21 is a slope characteristic diagram, Fig. 22 is a flowchart diagram for explaining slope processing, and Fig. 23 is a graph diagram explaining exposure content changing action.
FIGS. 24, 25, and 26 are explanatory diagrams of the configuration of an optical system that limits the field of view of the light receiver. 16... Exposure lamp, 20... Main circuit, 22... Commercial power supply, 24... Switching signal generation circuit, 26e1 processing circuit, 28... Phase detector, 34... Light receiver, 68A , 68B, 68C168D, 68E, 68
F... Light receiving unit. Agent Patent Attorney Jun Nakajima Figure 2 Figure 4 Figure 50 (54) Figure 5 Figure 6 Figure 9 Figure 10 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 4 Figure 26 Amendment to figure procedures June 12, 1980 Kazuo Wakasugi, Commissioner of the Patent Office 1. Case display printer system 3. Person making the amendment Relationship with the case Applicant Address 210 Nakanuma, Minamiashigara City, Kanagawa Prefecture Name ( 5
20) Fuji Photo Film Co., Ltd. Representative Omagari Award 4, Agent address: 2-20-12-5 Yoyogi, Shibuya-ku, Tokyo, Date of amendment order: Voluntary amendment 6, Subject of amendment 7, Contents of amendment (1) Details "42A (red)" on page 7, lines 13-14
, 42B (green) 42G (blue) J is now r42A (cyan), 42B (magenta), 42C (yellow). (2) "Exposure time" in the first line of page 46 of the specification is changed to "exposure light source light." (3) "Exposure time change J" in the first line of page 47 of the specification is changed to "exposure light source light change."that's all

Claims (1)

[Claims] (1) an exposure power source that supplies the exposure lamp with a lighting current that changes at a predetermined cycle; a light receiver that receives the light source light from the exposure lamp; and a phase detector that detects the phase of the lighting current;
A printer system comprising: a photometric value calculation circuit that samples a light receiving signal of a light receiver in synchronization with a phase detection signal and calculates a photometric value of light source light based on the light receiving signal sampling value. (2. In the system described in claim (1), the exposure power source includes a main circuit including a semiconductor current control element that converts an alternating current into the lighting current by phase control, and a switching circuit of the semiconductor current control element. 1. A printer system comprising: a switching signal generating circuit that performs control; and a phase detector detecting the phase of the alternating current.