JPS60182430A - Color photographic printing device - Google Patents

Abstract

PURPOSE:To speed up printing in addition to contrast adjustment by adjusting the subexposure quantities of R, G, and B colors, and performing main exposure and subexposure simultaneously. CONSTITUTION:Specific exciting currents are flowed to subexposure light sources 9R-9B for photographic printing operation. A black shutter 8 is opened on the start of the printing, filters 2C-2Y are opened, and the subexposure light sources 9R-9B are turned off completely. Thus, the subexposure and main exposure are started and then the subexposure light sources are turned on in the order of, for example, 9G, 9B, and 9R to complete G subexposure, B subexposure, and R subexposure. Further, a filter group 2 is closed in the order of a Y cutting filter 2Y a C cutting filter 2C, and an M cutting filter 2M to carry out R main exposure, B main exposure, and C main exposure successively, and the black shutter 8 is closed lastly to finish the photographic printing operation.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) This invention provides a method for printing R (red), G (
The present invention relates to a color photographic printing apparatus in which the sub-exposure amounts of three colors (green) and B (blue) can be adjusted independently, and main exposure and sub-exposure can be carried out simultaneously.

(Technical Background of the Invention and Problems thereof) Sub-exposure refers to irradiating a photosensitive material with diffused light that does not contain any image information, in addition to the main exposure that contains image information. For example, if the relationship between the main exposure amount E and the photosensitive density of a photosensitive material when sub-exposure is not performed is represented by the solid line curve X shown in FIG. When the IM characteristic is applied, the density mainly in the low-density area increases, as shown by the broken line curve S in FIG. 1, and by performing sub-exposure, the photosensitive density characteristic of the photosensitive material is controlled so that the contrast becomes small. I can do it.

By the way, as a photographic printing device with a sub-exposure function,
For example, there is one described in Japanese Patent Publication No. 38-18709. However, in such conventional photographic printing apparatuses, main exposure and sub-exposure are driven in chronological order by separate printers, so that it is not possible to simultaneously perform 18-light exposure and sub-exposure. However, there are disadvantages in that the operation is complicated and the device is complicated. Also,
L: Conventional photographic printing equipment applies a uniform sub-exposure to a light-sensitive material having a certain exposure range, in addition to the main exposure, to reduce the contrast if the original plate has high contrast. It is designed to be able to print ζ1 digits even on original plates, and no consideration has been given to speedy printing other than contrast adjustment.

(Objective of the Invention) This invention has been made in view of the dual circumstances, and it is possible to independently adjust the sub-exposure amount of each of the three RGB colors, and also to perform main exposure and sub-exposure simultaneously. The purpose of the present invention is to provide a color photographic printing apparatus that can perform

(Summary of the Invention) The present invention relates to a color photographic printing apparatus that can quickly produce color photographic prints with good color balance, and includes a light source for main exposure and image information from a color photographic film irradiated by this light source. A lens system for forming an image on color photographic paper, and a sub-exposure light source whose brightness or emission time can be adjusted independently for RGB are provided between the lens system and the color photographic paper, and further A black shutter for controlling main exposure is provided between the sub-exposure light source and the color photographic paper.

(Embodiment of the Invention) Fig. 2 shows a schematic configuration of an embodiment of the present invention.
GB The fish body 1 is passed through a filter group 2 that adjusts the exposure amount of the main exposure of the three colors for each color, and a mirror hox 3 to a color photographic film A (for example, a negative film) 4.

Here, filter group 2 is composed of three filters, and as shown in FIG. 3(A), the frequency characteristics are red (R).
As shown in the figure (B), there is a C-cut filter 2C with a cyan color (C) for absorbing green light, and an Akanto filter 2M with a magenta color (M) for absorbing green light (G) as shown in the same figure (B).
and a yellow (Y) color filter 2Y for absorbing blue (B) as shown in the same figure (C), and the ROB three color image information of the color photographic film 4 The light sensor 12R for the R color, the light sensor 12G for the 0 color, and the light sensor 12B for the 8 colors measure 1, respectively, and the filter group 2 controls the main exposure amount controller so that an appropriate main exposure amount is obtained based on the measurement data. Controlled by 5.

The light containing the image information from the color photographic film 4 is focused by a lens system 6 and formed into an image on the color photographic paper 7, but the light containing the image information on the color photographic film 4 is focused by the lens system 6 and formed on the color photographic paper 7, except for the printing surface. It is blocked by a black shutter 8 disposed between the photographic paper 7 and the photographic paper 7. In addition, lens system 6
Three sub-exposure light sources 9R, 9G and 8B whose lighting time and brightness are independently controlled are provided between the black shutter 8 and the color photographic film 4 at positions where they do not block the transmitted light from the color photographic film 4. , these sub-exposure light sources 9R, 9G
and 9B each have a filter IOR that allows the R color to pass through.
A filter IOC that transmits , G colors, and a filter 10B that transmits eight colors are arranged in series, and the color photographic paper 7 is irradiated with diffused light of three colors of RGB without image information. The sub-exposure light sources 9R to 9B are also blocked by a black shutter 8 except during printing, and the sub-exposure amount (time) of each of the sub-exposure light sources 9R to 9B is controlled by a sub-exposure roller 11. It has become.

In the above configuration, the light source 1 is always turned on during work, and the sub-exposure light source 9 is ready for photo printing.
When R~9B is lit, the black shutter 8 is opened,
Printing begins with main exposure and sub-exposure. At this time, all of the filters 2M to 2Y of the filter group 2 are in an open state, that is, a state in which all of the RGBa color light is allowed to pass through.

Here, when incandescent lamps are used as the sub-exposure light sources 8R to 9B, in the exposure power type that controls the light emission time of the incandescent lamps, due to the thermal inertia of the filament, fJ!
, even when the exposure time is the same, there is a difference in the amount of exposure when exposing to light. As a preventive measure, it is possible to cause a minute current to flow through the filament as an excitation current to raise the filament temperature in advance. However, if such a minute excitation current is allowed to flow, the workpiece 1 of the printing device
At F time etc., the photographic printing paper 7 is exposed to light for a long time, resulting in so-called fog. Therefore, in this invention, the sub exposure light beams 15A8R to 8B are transferred to the black shank 8.
The photographic printing paper 7 is arranged outside of the photographic paper 7 so that it does not fog even when an excitation current is applied thereto, thereby ensuring stability. That is, in this invention, an excitation current is applied to the sub-exposure light sources 9R to 8B when the work starts, and even when printing starts, the unbalance of the sub-exposure amount due to the thermal inertia of the filament is removed. I have to. However, since the sub-exposure light sources 9R to 8B are arranged outside the blank shutter 8, the photographic paper 7 is not exposed to light during a work stoppage when the black shutter 8 is closed. The sub-exposure amount is calculated as the product of the luminance and light emitting time of the sub-exposure lights @ 9R, 9B and 9G, regardless of the image on the color photographic film 4. When it reaches this point, the sub-exposure controller 11 or the sub-exposure light source 9G is turned off.

Therefore, in this example where the light is turned on in advance by an excitation current, the calculation is performed by multiplying time and light sensitivity from the time when the blank shank 8 is opened. Similar control is performed for the other R sub-exposure amounts and B sub-exposure amounts. The main exposure amount is controlled by the main exposure controller 5, and the image information of the color photographic film 4 is measured by optical sensors 12R to 12B for each color of RGB and input to the main exposure controller 5. When the main exposure amount reaches a predetermined exposure amount, the main exposure controller 5
The Y cant filter 2Y is closed, and the B from the light source is
Absorbs packaging ingredients. Similar control is performed for the other R main exposure amounts and G main exposure amounts. When all the main exposures and sub-exposures are completed in this manner, the black shank 8 is closed and the photographic printing process is completed. At the same time, excitation current is caused to flow through the sub-exposure light sources 9R to 9B in preparation for the next print. It is also possible to turn on the sub-exposure light sources 8R to 9B in advance to a required light intensity, set the point in time when the blank shutter 8 is opened as the lighting start time, and control the time until the lights go out as the sub-exposure time. be.

FIGS. 4(A) to 4(G) are time charts showing an example of exposure amount control in the series of photographic printing described above.
A predetermined excitation current is passed through R to 8B. Then, when printing starts, the blank shutter 8 is opened (as shown in the figure).
A)), the filters 20 to 2Y are opened and (
(B) to (D) in the same figure), and the sub-exposure light sources 9R to 9B are completely turned on ((E) to (G) in the same figure). After such sub-exposure and main exposure are started, for example, the sub-exposure amount light source 9G (
The sub-exposure light source 9B ((G) in the same figure), and the sub-exposure light source 9R ((E) in the same figure) are turned off in this order to complete the G sub-exposure, B sub-exposure and R sub-exposure, respectively. . Furthermore, Y
Cut filter 2Y ((D) in the same figure), C force.

cut filter ((B) in the same figure), M cut filter 2M (
The filter group 2 is closed in the order shown in FIG.
Finally, the blank shank 8 is closed to complete the photographic printing process. At the end of this process, a predetermined excitation current is passed through the sub-exposure lights ff1t9R to ff1t8B for the next printing as described above.

In addition, in the above embodiment, the main exposure amount is controlled by controlling the light emission time using a C cut fill, 1M cant fill, and Y cant filter, but the light emission time can be kept the same and a dimmer filter etc. The brightness may also be controlled. The sub-exposure amount can also be controlled by brightness control. Further, the sub-exposure amount may be controlled in relation to the main exposure amount, and furthermore, the present invention can be similarly applied to printing from a rehearsal film.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining changes in the photosensitive density characteristics of a photosensitive material due to sub-exposure, FIG. 2 is a schematic diagram of an embodiment of the present invention, and 31Δ(A) is a C-force filter; Same figure (
B) is an N-cant filter, FIG. 4(C) is a diagram showing the frequency characteristics of an N-cant filter, and FIGS. 4(A) to (G) are exposure examples for each of the three RGB colors of main exposure and sub-exposure according to the present invention. This is an evening rming chart showing the l... Light source, 2... Filter group, 4... Color photographic film, 5... Main exposure controller, 6... Lens system, 7... Color photographic paper, 8... Blank Shank, SR, 9G, 9B...Sub exposure light source, IOR
, IOC, 10B...filter, ll...sub exposure controller, 12R112G, 12B... light sensor. Fig. 2 Fig. 3 Plug excess rust A amount 400 500 600 '100 (Ri T) No. 4
Figure MiA Self Amendment of Termination Procedure April 18, 1980 Patent Application No. 389H of 1989 2 Name of Invention Color Photo Printing Device 3 Relationship with Vulnerability of Person Who Straightens Sleeves Patent Applicant 210 Nakanuma, Minamiashigara City, Kanagawa Prefecture Address (520) Fuji Photo Film Co., Ltd. 4 Agent 5 Subject of correction 6 Contents of correction (1) In the specification, page 4, line 18, "frequency characteristics" is corrected to read "spectral characteristics." (2) On page 6, lines 13 to i14 of the same document, it says, ``When the sub-exposure light sources 9R to 9B are turned on, the black shank 8 is opened and photographic printing by main exposure and sub-exposure is started.j "When the black shutter 8 is opened, photographic printing with main exposure starts, and at the same time, sub-exposure light TA9R ~
When 9B is turned on, sub-exposure is started. ” he corrected. (3) Correct the phrase "C cant filter" in the third to fourth lines of page 10 to read "C cut filter 2G". (4) In the same article, page 11, line 6, replace “frequency characteristics” with “
Spectral characteristics” and corrected.

Claims (2)

[Claims] (1) A light source for L exposure, a lens system that forms an image of the image information from the irradiated color photographic film onto color photographic paper, and an independent RGB relationship between this lens system and the color photographic paper as described below. 1. A color photographic printing apparatus comprising: a sub-exposure light source whose brightness or emission time is adjustable; (2) The color reciprocal printing device according to claim 1, wherein a black shutter for controlling the main exposure is disposed between the sub-exposure light source and the color photographic paper.