JPS61174539A - Photograph printing device - Google Patents

Abstract

PURPOSE:To optimize the hue and density of a photograph by measuring the quantity of transmitted light of a negative film for every fine area by utilizing light from a light source for printing and performing printing processing under the condition controlled on the basis of the photometric result. CONSTITUTION:The quantities of transmitted blue, green, and red light beams are measured by the photodetector group of a photometric mechanism 6 for every fine area DELTAS of an image part of the negative film F. Thus, the photometry of the entire area of the image part is completed and then the photometric mechanism 6 is put off an optical path of printing. Information on the quantities of transmitted light of the image part is processes by an information processor to set the printing condition. A cut filter is selected in a cut filter group 3 on the basis of the printing condition and put in the optical path of printing by its electromagnetic solenoid. A shutter mechanism 8 put off the optical path of printing by its electromagnetic solenoid for a time determined on the basis of the printing condition to print a projection image of the image part of the negative film on photographic paper P, thereby optimizing the hue and density of the photograph.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Dramatic Analysis] The present invention relates to a photographic printing apparatus, particularly to a photographic printing apparatus characterized by a photometric mechanism.

[Traditional & technique]

In order to form a photograph, a printing process is required, which involves developing a photographed film to obtain a negative film, and then printing the image of the negative film onto photographic paper. In this printing process, 1) Usually, the amount of light transmitted through the negative film is measured before #8 printing, and the measurement results are Based on this, the operation of the cut filter and shutter is controlled to ensure proper printing.

Conventionally, LAT consists of a plurality of photometric elements fixedly arranged around an imaging lens so as not to interfere with the printing optical path.
A D photometry mechanism is provided, and these photometry elements measure the blue component, green component, and
Add the amount of light of the red component in each column, and based on this measurement result, use an 8m cut filter, that is, a yellow cut filter.

A cut filter selected from a main cut filter and a cyan cut filter is inserted into the printing optical path, and the shutter that regulates the exposure amount is opened for a set time based on the measurement results to remove the negative film. A photographic printing device with nine configurations is known that prints a projected image onto photographic paper. Since this method employs a printing method, it is necessary for an operator to visually judge the negative film in order to ensure that the hue and backing in the photograph are sufficiently appropriate, and therefore it is not possible to achieve automation of printing. However, it has the problem of being inconvenient.

For this reason, in recent years, research and development has been carried out to adopt a photometric a structure called negative film sensibility.

This Negative Films Thousand Years.

A photometric light source is provided separately from the printing light source, and a photometric optical system is disposed in the optical path of the photometric light source, and the photometric optical system is moved and scanned between the photometric light source and the photometric optical system. The system measures the amount of transmitted light in each minute area of the cinema film, and calculates the measured value for each minute area to select a cut filter and set the shutter opening time. This is what I did. According to such a photometry mechanism, proper printing processing can be performed without requiring visual judgment of the negative film by an operator.
[Problem to be solved by the invention] Recently, however, there has been a strong desire for the emergence of a low-cost, simple-configuration photo printing device that allows end-users such as camera stores to easily print photos. I'm going to be able to do it. However, in the photographic printing apparatus which employs a photometric mechanism called a negative film sensor as described above, a dedicated photometric light source is required in addition to the printing light source, which makes the apparatus expensive and complicated. Since the light source for photometry is separate from the light source for printing, the hue or quality of the resulting photographs may not necessarily be the same even though the printing process was carried out under controlled conditions based on the measurement results. It has two problems: it is not appropriate.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its object is to provide a photographic printing apparatus that has a simple configuration and can perform printing processing reliably under appropriate conditions. .

[Means and effects for solving the problems] The photographic printing apparatus of the present invention includes a printing light source, a photometry mechanism that measures the amount of light transmitted through the negative film during printing, and a photometry mechanism that measures the amount of light transmitted through the negative film during printing. a group of cut filters that control the original wavelength characteristics from the light source for printing, and a shutter mechanism that controls the amount of light on the photographic paper based on the measurement results by the photometry mechanism; It is assumed that the negative film is moved and scanned so as to cross the printing optical path from the light source to the photographic paper, and is moved to a position outside the printing optical path to perform post-printing.

According to such a configuration, the configuration is simple as there is no need for a dedicated light source for photometry rounding, and the amount of light transmitted through the negative film by the light from the printing light source actually used for printing can be measured for each minute area of the negative film. Since the printing conditions are set based on measurements, the printing process can be reliably performed under appropriate conditions, making it possible to obtain good 1-inch real photographs.

〔Example〕

An embodiment of the present invention will be described in detail below.

FIG. 1 is an explanatory diagram showing the outline of a photographic printing apparatus. Reference numeral 1 denotes a printing light source. Behind this light source 1, a visible light reflecting mirror 11 is arranged. 2 is heat-resistant glass, light source 1
It prevents the negative film from being burnt out by suppressing the transmission of the hot rays of the light.

8 is a group of cut filters.1 For example, a yellow cut filter 81 that cuts yellow light components, a magenta cut filter 82 that cuts magenta light components, and a cyan cut filter 8 that cuts cyan light components.
3, each of these cut filters is provided movably in the printing path by the electromagnetic sensor 811, 821, 881, and is selected based on the measurement results by the photometric mechanism described later. A cut filter is inserted into the printing optical path during printing. Reference numeral 4 denotes a mirror tunnel. The inner surface of the mirror tunnel 4 is configured with a mirror surface, and the printing source after passing through the cut filter is reflected and mixed inside the tunnel, thereby making it uniform. Reference numeral 5 denotes a diffuser plate which works together with the mirror tunnel 4 to prevent uneven illumination of the negative film.

F is a negative film used for printing, and this negative film F is placed immediately after the diffusion plate 5. Reference numeral 6 denotes a side light mechanism for measuring the amount of light transmitted through the negative film F during printing, the details of which will be described later. Reference numeral 7 denotes an optical system for forming an image, and a photographic paper P for printing is placed at a printing position for printing a projected image of a negative film F.
It is the ninth thing that forms an image. 8 is a mechanism for blocking the printing optical path; a shutter plate 81;
This is called an electromagnetic sohinoid 82 for moving the shutter plate 81 forward and backward into the printing optical path.

This shutter plate 81 normally enters the printing optical path and blocks the printing optical path, but during printing, it exits the printing optical path only for the required time, which is set based on the measurement results by the optical device 1116. to control the exposure amount of the mark 11P.

The photometry mechanism 6 is shown in detail in FIG.

Total reflection mirror 61, first lens/e group 6z, second lens group 68, filter group 64, and light receiving element group 65
and a moving scanning mechanism 9. The total reflection mirror 61 is mounted on a mirror mount 611 at an angle of approximately 45 degrees with respect to the axis of the printing optical path.
11 is a slide plate 91 of the moving scanning mechanism 9. El is determined. The first lens group 62 has eight belt-shaped lens holes 6z1゜szg, szs, and lens holes/-62.
4, a total reflection mirror 610 is held in line in a direction perpendicular to the reflected optical path, and a lens holder 624 is fixed to the slide plate 91. 625
, 626 is a partition plate. The second lens #63 has eight band-shaped lenses 6131, 682°683.The holder is mounted so that these lenses receive light from the lenses 621, 622, and 628 of the first lens group 6z, respectively. 9. They are held in a line in 684. The holder 684 is fixed to the slide plate 91. The filter group 64 includes a band-shaped Sollu filter 641 that mainly transmits blue-based light, and a band-shaped green-based filter 642 that mainly transmits green-based light.
and a band-shaped red filter 648 that transmits red light as the king), these filters 64
1,641643 are front E lenses 631,682 respectively
．． It is held in the holder 684 so as to be located immediately after 68f3. The light-receiving element group 65 consists of eight band-shaped light-receiving elements 651, 652, and 658.
The elements are the filters 641, 642, 64 respectively.
It is held in the holder 684 so as to be located after the turn on of the switch 3. These light receiving elements 651, 6521.65
Reference numeral 8 is, for example, a photodiode array, and the length of its light-receiving section (the length in the direction perpendicular to the plane of the paper in Fig. 2I) is the length in the circular direction (the length in the direction perpendicular to the plane of the paper in Fig. 2) of the transmitted light from the corner of the negative film F. (length in direction) The length is such that the transmitted light from the band-shaped region extending over the entire area can be received at once. Specifically, as shown in FIG. 8, one frame of the image portion F1 on the negative film F is divided into m rows along the width direction (hereinafter referred to as the "Y direction"), and the length of the image 11sF1 is divided into m rows. The light-receiving elements 651.65B and 658f) are divided into n columns along the X direction (hereinafter referred to as the "X direction") and divided into Xn minute areas ΔS with a total amount of 0. The light receiving portions LA are arranged in a line to correspond to the number of small areas, that is, n, that are included in the light receiving area.

The moving scanning mechanism 9 includes the slide plate 91, the slide guide 9z, the slide guide mounting plate 98, the A-sis motor 94, and the power transmission section 100. Power transmission part 1
00 is the first boo fixed to the rotating shaft of the pulse motor 940! J 101 and this first boo! 7101, a second pulley 10B that receives the rotational force from 10g, and a second pulley 10B that is coaxially connected to the second pulley 10B. It consists of a fixed gear 104 and a rack 105 provided at the bottom of the slide plate 91 so as to mesh with the gear of the ear 104.

The slide plate 91 is slidably attached to the slide guide 9z, and the slide plate 91 is moved forward and backward into the printing optical path by forward and reverse rotation of the pulse motor 94. Accordingly, the total reflection mirror 61. First lens group 62. Second lens group 68. The filter group 64 and the light receiving element group 65 move together. A notch 911 is provided at the end of the slide plate 91 to which the mirror mount 611 is fixed so as to obstruct the printing optical path when the slide plate 91 is withdrawn.

The photometry mechanism 6 described above is held on an optical system holding stand 71 that holds the storage optical system 7.

According to the apparatus having the above configuration, the printing process is performed as follows. First, negative film! is set so that its image portion F1 is located at a predetermined position immediately behind the diffuser plate 5. In the photometry mechanism 6, the mirror motor 94 is rotated in the forward direction, and the total reflection mirror 61 reflects the leading edge of the image area F1 of the negative film F (
In FIG. 3, the slide plate 91 is moved into the printing optical path to a position where it can receive the transmitted light from the first row of minute regions on the left [section 1111]. Next, by reversing the pulse motor 94 at a constant speed, the data slide plate 91 is moved backward at a constant speed within the printing optical path, and the total reflection mirror 61 is moved from its tip toward the image area F1 of the negative film F. Move and scan to the end. During this movement scanning, as the total reflection mirror 61 moves and scans, the first lens group 62
．． The amount of transmitted light incident on the light-receiving element group 65 through the second lens group 6B and the filter group 64t varies from that corresponding to the minute area in the first column of the image area Fl of the negative film F to the minute area in the n-th column. Since the amount of transmitted light changes sequentially up to the area corresponding to the area, it is possible to measure the amount of transmitted light of the blue thread, green type light, and red type light for each minute area ΔS of the image area F1 in the light receiving element group 65. After completing photometry for the entire image area in this way, the pulse motor 9
4, the system slide plate 91 is moved back to move the photometry mechanism 6 out of the printing optical path. On the other hand, information on the amount of light transmitted through the image area F1 obtained by the light receiving element group 65 is processed by an information processing device (not shown) to set printing conditions, and the cut filter group 8 is processed based on the printing conditions. The selected cut filter is activated by its electromagnetic solenoid.
The shutter plate 81 is inserted into the printing optical path, and in the shutter mechanism 8, the shutter plate 81 is moved out of the printing optical path by the No. 7 xi misolenoids for a time set based on the printing conditions.

At this time, the projected image of the image area F1 of the negative film F is marked 1I.
Printed on III paper P.

In the above, the number of light receiving areas LA in each of the light receiving elements 651, 652, 653 is equal to 1 in the image area of the negative film F.
The number of divisions in the Y direction may be greater than or equal to the number of divisions in the Y direction.

This is because the area of the minute region ΔS required for photometry changes depending on the size of the area of one image portion p1.

In order to make photometric iso vl #6 usable in common regardless of the size of the image sF1, it is necessary to
It is preferable to increase the number of light receiving sections LA so as to correspond to the necessary number of divisions in the Y direction.

In the case where the number of light receiving units 11sLA is increased in this way, when photometry is performed on the large-area image area F1,
It is preferable to measure the amount of transmitted light by fitting a plurality of light-receiving parts LA so as to correspond to the area of the minute region ΔS required for photometry.

In addition, if LATD photometry is required in addition to such so-called I-India photometry, it is sufficient to calculate the average amount of transmitted light for each of the nine minute areas obtained in point photometry, which makes it easy to perform LATD photometry. can be achieved.

Furthermore, the slide plate 91 can also be used as a shutter plate, and in this case, after the movement and scanning of the slide plate 91 during photometry is completed, the time required for the slide plate 91 to be moved out of the printing optical path will change the photometry result. The normal rotation and reverse rotation of the pulse motor 94 may be controlled based on the photometry result so that the set time is reached based on the photometry result.

In such a configuration, a dedicated shutter plate and an electromagnetic solenoid for driving the shutter plate are not required, and the configuration is simplified.

According to the above configuration, the ninth step of enabling the photometry mechanism 6 to move and scan the negative film within the printing optical path is to perform photometry while using the light of the printing light source 1.
f: Child, it is not necessary to provide a dedicated light source as a light source for this precise photometry, and the configuration is simple and low cost.
However, in photometry, the light from the printing light source actually used for printing is used, and the amount of transmitted light through the negative film is measured for each minute area of the negative film under controlled conditions based on the photometry results. By performing a baking process.

It is possible to ensure that the color and backing of the photograph obtained are overpressure.

〔Effect of the invention〕

As described in detail above, the present invention includes a printing light source, a photometry mechanism that measures the amount of transmitted light through the negative film during printing, and a light source that measures the amount of light emitted from the printing light source based on the measurement result by this photometry mechanism. The photometering mechanism includes a cut filter group that controls the temporary & characteristics of the photometer, and a shutter mechanism that controls the exposure amount of the print based on the measurement result by the photometering mechanism.

The negative film is moved and scanned across the printing optical path from the printing light source to the printing plate.

Is there any burning after the position is set outside the burning optical path? Since the photographic printing apparatus is characterized in that the photoprinting apparatus has a simple structure, it is possible to provide a photographic printing apparatus which has a simple structure and can actually perform printing processing under overpressure conditions.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing an outline of one embodiment, Fig. 2 is an explanatory diagram showing an example of a photometric mechanism, and Fig. 8 is an explanatory diagram for explaining the correspondence between the divided minute areas in the negative film and the light-receiving elements. FIG. 1... Light source for printing 8... Cut filter group 4... Mirror tunnel 5... Diffusion plate 6... Sub-Kyuden 7... Optical system for imaging 8... Shutter mechanism 61 ... Total reflection mirror 6z ... First lens group 63 ... Second lens group 64 ... Filter group 65 ... Light receiving element group 9 ... Moving scanning mechanism 91 ... Slide plate 9z...Slide guide 98...Slide guide mounting plate 94...Pulse motor 61, 65Z, 65B...Light receiving element/ON construction

Claims (1)

[Claims] 1) a printing light source, a photometry mechanism that measures the amount of light transmitted through the negative film during printing, a cut filter group that controls the wavelength characteristics of the light from the printing light source based on the measurement results of the photometry mechanism; a shutter mechanism that controls the exposure amount of the photographic paper based on the measurement result by the photometry mechanism; A photographic printing apparatus characterized in that the photographic printing apparatus is moved and scanned, and printing is performed after the photographic printing apparatus moves to a position outside the printing optical path.