JPH0643795Y2 - Exposure device for slide printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an exposure device of a slide printer used for printing and exposing a positive image of a color slide on a photographic film.

[Conventional technology and its problems]

Generally, when making a color print from a color slide, a positive image of the color slide is printed and exposed on a photographic film using a slide printer, and a color negative image formed by the development processing of the photographic film is printed on a normal color paper. Is developed.

The above-mentioned photographic film is called an inter negative, and there is a slide printer forming the inter negative as shown in FIG. 5 as a prior art.

This slide printer is provided with an exposure lamp 60, a mirror tunnel 61, a lens 62 and a filter plate 63 in order, and the light of the lamp 60 passing through the mirror tunnel 61 is
The slide S placed behind the mirror tunnel 61 is irradiated, and the positive image of the slide S is printed and exposed through the lens 62 and the filter 64 of the filter plate 63 to the photographic film F arranged behind the lens 62. ing.

Here, the filter plate 63 has a rotation center axis at a position eccentric with respect to the optical axis of the lamp 60, and a blue filter, a green filter, and a red filter are attached on the circumference passing through the optical axis. Each filter 64 of this filter plate 63
Are sequentially arranged on the optical axis by the rotation of the filter plate 63, and one printing exposure operation is completed by passing each filter through the optical axis.

By the way, in the above slide printer, since the filter plate 63 is disposed between the lens 62 and the photographic film F and is mounted close to the photographic film F, the filter plate 63 is attached to the filter 64 due to dust, and Dust shadows are formed on the photographic film F, so that color unevenness is likely to occur in the color negative image exposed by printing, and the refractive index of each filter is difficult to stabilize in blue, green, and red. 3 formed on the film
There is an inconvenience that a color negative image is displaced and a sharp color negative image cannot be obtained.

[Purpose of device]

Therefore, an object of the present invention is to provide an exposure device of a slide printer which can solve the above-mentioned inconvenience and can form a clear color negative image without color unevenness.

[Constitution of device]

In order to achieve the above object, the present invention has a rotation center axis between the lamp and a mirror tunnel at a position eccentric to the optical axis of the lamp, and the optical axis is centered on the rotation center axis. A filter plate with a plurality of filters attached is arranged on the circumference passing through, and the filter plate and the shutter plate placed in front of the lens are attached to a drive shaft that is driven to rotate by a motor. The exposure window is formed at a position facing each of the filters.

[Action]

According to the above structure, the rotation of the drive shaft causes both the filter plate and the shutter plate to rotate, and the transmitted light that has passed through the filter of the filter plate irradiates the slide, and the transmitted light of the slide exposes the shutter window. And through the lens the photo film is illuminated.

In this way, by irradiating the slide with the transmitted light of the filter and irradiating the photographic film with the transmitted light of the slide through the lens, even if dust is attached to the filter, it is not affected by the dust and refraction is prevented. Since it is not affected by the rate, a clear negative image can be formed on the negative film.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, an endothermic filter 2, a mirror tunnel 3 and a lens 4 are sequentially arranged on the optical axis of the exposure lamp 1. The color slide S is placed between the mirror tunnel 3 and the lens 4, and the photographic film F on which the positive image of the color slide S is printed and exposed is arranged behind the lens 4.

A filter plate 5 is arranged between the heat absorption filter 2 and the mirror tunnel 3. The filter plate 5 has a rotation center axis at a position eccentric with respect to the optical axis of the lamp 1, and a plurality of filter mounting holes 6 are formed on the circumference passing through the optical axis around the rotation center axis. A blue filter BF, a green filter GF, and a red filter RF are attached to each filter attachment hole 6.

A shutter plate 7 is arranged between the slide S and the lens 4, and the shutter plate 7 is arranged coaxially with the filter plate 5. Each filter B of the filter plate 5 is attached to the shutter plate 7.
An exposure window 8 is formed so as to face F, GF, and RF.

The shutter is closed when the portion of the shutter plate 7 without the exposure window 8 is rotated on the optical axis.

The shutter plate 7 and the filter plate 5 are attached to a drive shaft 9 arranged in parallel with the optical axis of the lamp 1. The drive shaft 9 is rotated by a motor 10.

2 and 3 show a slide printer adopting the above-mentioned exposure apparatus. The photo film F on which the positive image of the slide is printed is stored in the magazine 20.
The photographic film F drawn from the magazine 20 is conveyed by a drive roller 22 which is rotated by the drive of a motor 21 and a pressure roller 23 which is supported so as to come into contact with and separate from the drive roller 22.

The photographic film F conveyed by the rotation of the driving roller 22 and the pressure roller 23 is inserted into the inside of the film inlet / outlet formed in the film storage container 24 by the rotation of the winding shaft 25 incorporated in the film storage container 24. The winding shaft 25
Is wound on the outside of.

Here, the film storage container 24 is non-rotatably supported by the holder 26, while the winding shaft 25 is connected to the winding shaft 28 rotatably supported by the bearing 27. The winding shaft 28 and the driving roller 22 are a belt transmission mechanism.
When the drive roller 22 rotates in conjunction with 29, the winding shaft
28 is also designed to rotate.

A cutter device 33, which cuts the photographic film F with a fixed blade 31 and a movable blade 32, is arranged on the unloading side of the drive roller 22.
A film mask 34 is arranged on the loading side of the drive roller 22.

The film mask 34 is provided with a film guide groove 35 for guiding the movement of the photo film F, and the photo film F inserted into the film guide groove 35 is pressed into the film guide groove 35 by the film pressing device 36 at the time of printing exposure. To be

The film pressing device 36 movably supports a pair of pins 40 attached to the film pressing plate 39 by a film pressing plate holder 38 that is swingably supported about a shaft 37, and the film pressing device is attached to the outside of each pin 40. A spring 41 for pushing the plate 39 toward the film guide groove 35 is fitted to the film holding plate holder 38.
Is held by the attraction of the magnet 42.

A character printing opening 43 and an exposure opening 44 are provided on the bottom surface of the film guide groove 35, and the exposure device according to the present invention is provided so as to face the exposure opening 44. Further, a character burning device 50 is provided so as to face the character burning opening 43.

As shown in FIG. 4, the character imprinting device 50 comprises a light emitting section 51 composed of a large number of LEDs, and a lens 52 which focuses the light from the light emitting section 51 and irradiates the photographic film F with the characters. An order number, the number of sheets, a stretched size, etc. are printed on the photographic film F by the baking device 50.

The slide printer shown in the embodiment has the above structure,
In order to print and expose a positive image of the slide S placed between the mirror tunnel 3 and the shutter plate 7 on the photographic film F placed behind the lens 4, the drive shaft 9 is rotated and each of the filter plates 5 is rotated. The filters BF, GF, and RF are sequentially stopped on the optical axis of the lamp 1 in accordance with the printing order, and the light passing through each of the filters BF, GF, and RF is applied to the slide S via the mirror tunnel 3, and the light transmitted through the slide S is transmitted. Is irradiated onto the photographic film F through the lens 4 and the positive image of the slide S is printed and exposed by the number of filters of the filter plate 5. The exposure time is appropriately controlled depending on the film stop time.

At the time of printing exposure as described above, in this invention, the transmitted light of the filters BF, GF, and RF is applied to the slide S, and the transmitted light of the slide S is applied to the photographic film F via the lens 4. Even if dust is attached to the filters BF, GF, and RF, it is not affected by the dust and is not affected by the refractive index of the filters BF, GF, and RF. As a result, the positive image can be clearly printed on the photographic film F by exposure.

Further, the exposure window 8 of the shutter plate 7 has a filter BF,
Since only GF and RF transmitted light is transmitted, photo film F
Light other than the filter-transmitted light does not hit, and thus a negative image without color unevenness can be formed.

〔effect〕

As described above, according to the present invention, the filter plate having a plurality of filters is provided between the lamp and the mirror tunnel, and the light transmitted through the filter of the filter plate is applied to the photographic film through the lens. When exposed to a photographic film, it is not affected by dust adhering to the filter or the refractive index. Therefore, a very clear negative image can be obtained, and the filter plate and the shutter plate having the exposure window are interlocked with each other to prevent light other than the light transmitted through the filter from hitting the photographic film. Therefore, a negative image without color unevenness can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an exposure apparatus according to the present invention, FIG. 2 is a plan view of a slide printer incorporating the same apparatus, FIG. 3 is a vertical sectional front view of the same, and FIG. Is a perspective view of a character imprinting apparatus, and FIG. 5 is a schematic view showing a conventional exposure apparatus. 1 ... Lamp, 3 ... Mirror tunnel, 4 ... Lens,
5 ... Filter plate, BF ... Blue filter, GF ... Green filter, RF ... Red filter, 7 ... Shutter plate, 8 ... Exposure window, S ... Slide, F ... Photo film.

Claims (1)

[Scope of utility model registration request] 1. An exposure apparatus of a slide printer, wherein a mirror tunnel is arranged in front of an exposure lamp, a light passing through the mirror tunnel is applied to a slide, and a positive image of the slide is printed and exposed on a photographic film through a lens. Between the lamp and the mirror tunnel, a rotation center axis is provided at a position eccentric to the optical axis of the lamp, and a plurality of filters are attached on a circumference passing through the optical axis around the rotation center axis. A filter plate is arranged, and the filter plate and a shutter plate arranged in front of the lens are attached to a drive shaft which is rotationally driven by a motor, and the shutter plate has an exposure window on the same axis as each filter of the filter plate. An exposure apparatus for a slide printer, characterized in that