JPH0667267A - Camera with flash light emitting device - Google Patents

Abstract

PURPOSE:To obtain a print with proper colors at all times and to improve the efficiency of light emission by recording a color correction signal corresponding to the lighting of the stroboscopic light emitting device on a photographic film. CONSTITUTION:An aperture diameter, a stroboscopic light emission quantity, and a shutter speed are calculated from the distance to a subject, film sensitivity, and subject luminance and while a stop 20 and a shutter 19 are driven with the calculated values, stroboscopic light 17 is emitted. During winding operation, the specific color correction signal corresponding to the difference between the color tone characteristic to the light emitted by the stroboscopic light emitting device 17 and a neutral color tone is outputted to a write head 23 to record color correction information at the time of printing on the film 72. Therefore, even when light is emitted without coloring the Xe tube and condenser lens of the stroboscopic light emitting device 17, a print having an accurate color tone can be obtained at all times and decrease in the quantity of light emission due to coloration is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a flash light emitting device (strobe light emitting device).

[0002]

2. Description of the Related Art Conventionally, in a camera having a strobe light emitting device including a Xe tube, a front condenser lens or a cover panel or a Xe tube is colored for color temperature correction.

[0003]

However, in the above-mentioned conventional camera, the amount of light is reduced by coloring and the color temperature changes depending on the amount of light emission when the amount of light emission is controlled. The color temperature could not be corrected.

The camera having the flash light emitting device of the present invention has been made in view of such a problem. The purpose of the camera is to obtain a print of an appropriate color at all times and to achieve a high flash efficiency. It is to provide a camera having a device.

[0005]

In order to achieve the above object, the present invention outputs a flash light emitting device and a color correction signal corresponding to the light emitted by the flash light emitting device when the flash light emitting device is in operation. An output means and an information recording means for recording the color correction signal on an information recording medium on a film are provided.

The present invention also provides a flash light emitting device, control means for controlling the light emitting amount of the flash light emitting device based on at least the distance from the camera body to the object and the film sensitivity, and the flash light emitting based on the light emitting amount. The color correction amount is calculated and the color correction signal is output as a color correction signal. The information recording means records the calculated color correction signal on the information recording medium on the film.

[0007]

That is, in the present invention, the color correction signal output corresponding to the light emitted by the flash light emitting device when the flash light emitting device is operated is recorded on the information recording medium on the film.
Further, according to the present invention, at least the color correction amount at the time of flash light emission based on the light emission amount based on the film sensitivity and the distance from the camera body to the subject is calculated and output, and the output color correction signal is used as the information recording medium on the film. To record.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a camera having a flash light emitting device according to the first embodiment.

In FIG. 1, the photometric means 10 comprises a light receiving element 8 for photometrically measuring the brightness of a subject, and a photometric circuit 9 for photoelectrically converting the output of the light receiving element 8 and outputting a photometric value to the CPU 15. The film sensitivity detecting means 11 is composed of a DX code reading switch, and the distance measuring means 12 is composed of an AF sensor for measuring the distance to the subject.

The strobe control circuit 16 has a CPU 15
A strobe light emitting device (flash light emitting device) 17 including a Xe tube, a reflector, and the like is caused to emit light by a control signal from. The drive circuit 18 drives the shutter 19 according to a control signal from the CPU 15 to operate it at a predetermined shutter speed. Similarly, the drive circuit 18 drives the diaphragm 20 to change it to a predetermined diaphragm aperture. Further, the drive circuit 18
Drives the film feeding motor 21 to wind and rewind the film.

Further, the photo reflector 22 detects the movement of the perforation of the film 72, and the CPU 15
The feed signal is output to. The write head 23 is composed of a magnetic head and is controlled by the CPU 15 to record a predetermined signal on the magnetic coated surface of the film 72.

The release switch 24 is a switch that is turned on by the release operation of the photographer. The strobe forced light emission mode setting switch 25 is an operation switch, and when the above mode is selected by turning it on, strobe light emission photographing is performed regardless of the subject condition.

3 (a) and 3 (b) are perspective views of the film feeding device of the camera according to the first embodiment of the present invention seen through from the rear, and FIG. 3 (a) shows the film 72 wound. FIG. 3B shows a state in which the film 72 is wound around the take-up spool 57, and a state in which the film 72 is rewound into the film magazine 70.

A pinion gear 53 is provided on the output shaft of the film feeding motor 21 provided in the camera body, and the pinion gear 53 meshes with the sun gear 54. Further, the sun gear 54 meshes with a planet gear 55, and the planet gear 55 is supported via a gear arm 56 so as to be revolved around the rotation axis of the sun gear 54. Further, in the film winding chamber provided on the right side from the rear of the camera body, a winding spool 57 for winding the film is rotatably provided, and an upper end surface of the winding spool 57 is provided. Is integrally provided with a spool gear 57a that meshes with the planet gear 55 when the planet gear 55 revolves counterclockwise.

An idle gear 67 is provided at a position where the planet gear 55 meshes with the planet gear 55 when the planet gear 55 revolves clockwise. At this time, the planet gear 55 includes the idle gears 67, 66, 65 and 62. Via the coupler gear 63.

Further, on the left side of the rear of the camera body, there is provided a magazine storage chamber for storing a film magazine 70 indicated by a chain double-dashed line. Above the magazine storage chamber, a coupler gear 63 having a coupler 64 having a tip protruding in a "-" shape is rotatably provided. This coupler 64 is a film magazine 70
Engages with the groove of the spool provided on the shaft and is integrated with the spool around the shaft. The coupler gear 63 always meshes with the idle gear 62 as described above. At a height, which is slightly closer to the center of the take-up spool 57 and faces the perforation of the film 72, a photo reflector (hereinafter referred to as PR, which is fixed to the camera body and outputs a pulse signal each time the perforation of the film 72 passes). (Abbreviated) 23 is provided. Further, on the back side of the film 72, a magnetic head 23 for recording shooting information on the magnetic coated surface on the back side of the film 72 is provided.

Next, the film feeding operation will be described. When the film 72 is wound, as shown in FIG. 3A, the film feeding motor 21 is rotated in the direction of the arrow by the control operation of the CPU 15, so that the take-up spool 57 is rotated in the direction of the arrow and the film magazine 70 is rotated. The film 72 is pulled out in the direction of the arrow A and wound on the winding spool 57. At the same time, the feeding amount of the film 72 is detected by the photo reflector 22, and the film feeding motor 21 is stopped in a state where the film is wound by one frame. Further, during the winding operation, the writing head 23 records the photographing information on the film 72 by the signal from the CPU 15.

On the other hand, when the film 72 is rewound, FIG.
As shown in (b), the film feeding motor 21 is rotated in the arrow direction by the control operation of the CPU 15, whereby the coupler gear 63 and the coupler 64 are rotated in the arrow direction, and the film 72 wound on the take-up spool 57 is removed. Rewind into the film magazine 70. At this time, the film 72 shows an arrow B.
Move in the direction.

FIG. 2 is a sectional view showing the main part of the stroboscopic light emitting device 17. In the figure, 1 is a Xe tube, and 2
Is a reflection lens, and 3 is a condenser lens. Xe tube 1,
Since the condenser lens 3 is not colored, the color tone of the emitted light is slightly bluish with respect to the neutral level,
There is no absorption of luminescence energy and the luminous efficiency is high. FIG. 4 is a flowchart showing the operation of the camera having the above configuration.

First, when the release operation is detected by turning on the release switch 24 in step # 101, # 10
In step 2, the distance to the subject is measured by the distance measuring means 12, and #
Focusing operation is performed by a focusing mechanism (not shown) at 103. Next, in # 104, the brightness of the subject is measured by the photometric means 10, and the photometric value (Bv) is input. Next, in # 105, the film sensitivity (Sv) is input from the film sensitivity detecting means 11.

Next, if the flash forced emission mode setting switch 25 is OFF in # 106, the exposure amount is calculated in # 107, and the exposure amount (Bv + Sv) is a predetermined value (C) in # 108.
Whether it is larger or not is determined to determine whether or not strobe light is emitted.
When it is determined that the exposure amount is larger than the predetermined value and the stroboscopic light emission is not necessary, the shutter speed and the aperture diameter which satisfy the exposure amount are calculated in # 109. Next, the diaphragm 20 and the shutter 19 are driven with the values calculated in # 110 and # 111, and the film feeding motor 21 is turned on for film winding in # 112. Then, by monitoring the output of the photo reflector 22 at # 113, the 1 of the film 72 is
When it is determined that the frame winding is completed, the film feeding motor 21 is turned off in # 114, and a series of photographing operations is completed.

On the other hand, if it is judged in # 108 that strobe light emission is necessary, in # 115 the aperture diameter, strobe light emission amount and shutter speed are calculated based on the distance to the subject and the film sensitivity.

Next, the diaphragm 20 and the shutter 19 are driven with the values calculated in # 116 and # 117, and at the same time, the strobe 17 emits light. Next, at # 118, the film winding motor 21 is turned on. Then, during winding operation # 119
Then, a predetermined color correction amount signal corresponding to the difference between the unique color tone of the light emitted from the flash light emitting device 17 and the neutral color tone is output to the writing head 23, and the color tone correction amount information at the time of printing is recorded on the film 72. , Go to # 113. On the other hand, in # 106, the flash forced-flash mode setting switch 2
When it is determined that the forced strobe light emission mode has been selected by turning on 5, the aperture diameter, the flash emission amount, and the shutter speed are calculated based on the distance to the subject, the film sensitivity, and the subject brightness in # 120, and the process proceeds to # 116. The second embodiment will be described below. The configuration of this embodiment is the same as that of the first embodiment shown in FIGS. 1, 2 and 3. FIG. 5 is the second
It is a flow chart which shows operation of an example. Figure 4
The steps denoted by the same reference numerals perform the same operation as in the first embodiment, and thus the description thereof will be omitted.

After the shutter is driven and the strobe light emission is completed in # 117, it is determined whether or not the strobe light emission amount calculated in # 130 is larger than a predetermined value. If the value is larger than the predetermined value, the amount of color correction by the strobe light will be almost constant, so
Go to # 118. On the other hand, when it is smaller than the predetermined value, Xe
Due to the characteristics of the tube 1, the emission color tone changes. Therefore, # 13
In 1, the emission color tone corresponding to the flash emission amount is calculated by a calculation method provided in advance. Next, in # 132, a color correction amount corresponding to the difference between the emission color tone and the neutral color tone is calculated. Next, in # 133, the film feeding motor 21
Is turned on, the color correction amount signal corresponding to the color correction amount calculated in the previous step is output to the writing head 23 during the winding operation, and the color tone correction amount information at the time of printing is recorded on the film 72. Then, the procedure goes to # 113.

In the above-described second embodiment, even if the luminescent color tone slightly changes depending on the amount of strobe light emission, the color tone correction amount information in consideration of the change is recorded on the film, so that it is possible to always obtain an accurate color tone print. .

[0026]

EFFECTS OF THE INVENTION Even if the Xe tube or the condenser lens of the stroboscopic light emitting device is made to emit light without being colored, it is possible to always obtain a print with an accurate color tone. Further, it is possible to prevent a decrease in the amount of emitted light and an increase in cost due to coloring.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a camera according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a main part of the strobe light emitting device shown in FIG.

FIG. 3 is a perspective view of the film feeding device of the camera according to the first embodiment of the present invention seen through from the rear.

FIG. 4 is a flowchart showing the operation of the camera of the first embodiment.

FIG. 5 is a flowchart showing the operation of the camera of the second embodiment.

[Explanation of symbols]

10 ... Photometry means, 11 ... Film sensitivity detection means, 12 ...
Distance measuring means, 15 ... CPU, 17 ... Flash light emitting device (strobe light emitting device), 23 ... Writing head, 24 ... Release switch, 25 ... Strobe forced light emission mode setting switch.

Claims (2)

[Claims] 1. A flash light emitting device, output means for outputting a color correction signal corresponding to the light emitted by the flash light emitting device when the flash light emitting device is in operation, and the color correction signal on the information recording medium on a film. An information recording unit for recording the information on the camera. 2. A flash light emitting device, control means for controlling the light emission amount of the flash light emitting device based on at least the distance from the camera body to the subject and the film sensitivity, and when flash light emission is performed based on the light emission amount. A camera comprising: a calculation unit that calculates the color correction amount of the above and outputs it as a color correction signal; and an information recording unit that records the calculated color correction signal on an information recording medium on a film.