JP2871302B2 - Photo printing method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic printing method and apparatus for producing trimmed prints.

[0002]

2. Description of the Related Art A conventional photographic printing apparatus will be described with reference to the drawings. FIG. 8 is a schematic view showing an example of a conventional photographic printing and developing apparatus. As shown in the figure, the apparatus roughly comprises an exposure section 51, a development section 52, and a drying section 53, and after exposure, is automatically developed and dried, and a completed photograph is carried out.

A roll of photographic paper 54 is fed by a feed roller 55
, And the sheet cut by the cutter 56 in front of the exposure table is printed. A transport belt 57 having a hole is stretched on the surface of the exposure table, is sucked by a suction box 58 inside the exposure table, and sucks and fixes the photographic paper. The exposure device 59 includes a negative mask, an adjustable enlargement lens, a light source, and the like.

[0004] The transport device near the exposure unit will be further described. 9 and 10 are views showing an example of a conventional transport mechanism near an exposure unit. FIG. 9 is a perspective view, and FIG. 10 is a sectional view.

As can be seen from FIGS. 9 and 10, a roll-shaped photographic paper 54 stored in a magazine 61 is pulled out by a feed roller 55 and cut into sheet pieces by a cutter 56. The sheet piece is guided by the entrance guide 62 and placed on the belt conveyor of the exposure table 60.

[0006] The conveyor belt 57 used for the belt conveyor has an uneven rib on the back surface, and rotates while meshing with the teeth of internal rollers. The paper is sucked from the inside of the exposure table by the holes of the conveyor belt 57, and the printing paper is sucked. The belt conveyor stops at the proper exposure position, and after exposure, the conveyor belt 5
7 is rotated and conveyed, and the printing paper passes through the exit guide 65,
It is carried out from the exposure unit.

In the example shown in FIG. 1, the driving force of the transport mechanism is obtained by rotating a motor 64 and transmitting power to each roller by a belt 63.

[0010] As shown in FIG. 10, a suction fan 66 rotated by a motor 67 is provided inside the exposure table, and a suction force is generated by discharging air from an exhaust hole. The suction fan and the like are housed in the suction box 58.

When a trimming print is prepared using such a conventional photoprinting apparatus, the exposure table and the enlargement lens are fixed, a part of the negative is enlarged by moving the film, and the print is printed on photographic paper. Is going. Generally, the movement of the film is performed manually.

[0010]

The printing by trimming generally has a large enlargement magnification, and in the method of moving the film, even a slight deviation of the negative causes a large error on the exposure table. In the trimming, since the film is manually moved, the film may be stained with sebum and the like, and fine adjustment is difficult and requires skill.

In order to move the film using the moving mechanism, a high-precision device capable of minute movement is required, especially when the stretching magnification is large. Many photographic printing apparatuses are equipped with an automatic film feed mechanism that moves in a fixed manner in order to increase work efficiency. If the movable type is used for fine adjustment of the film to perform trimming printing, the configuration of the printing apparatus becomes complicated, and the accuracy of the moving mechanism becomes uneasy.

An object of the present invention is to provide a trimming moving mechanism with high precision and to provide an efficient trimming method.

[0013]

In order to solve the above-mentioned problems, in the present invention, an enlargement lens and an exposure table are provided with moving means to perform printing by trimming. And take a picture of the negative film with a TV camera
Monitor with trim position setting cursor
Displayed on the screen and stretched from the specified trimming position.
Lens magnification, trimming lens and exposure table trim
Calculate the parallel displacement for adjusting
Magnification of a stretch lens, the stretch lens and the exposure
The table is stretched by displacing the table in parallel. The outline of the position adjusting mechanism used in the trimming method of the photo printing apparatus of the present invention will be described with reference to FIG.

FIG. 1 is an explanatory view showing an example of a position adjusting mechanism used in a trimming method of a photographic printing apparatus according to the present invention. The desired trimming is performed by fixing the negative film 22 and moving the positions of the stretching lens 2 and the photographic paper 23. In the example of this drawing, the movement of the stretching lens 2 and the printing paper 23 is controlled in the XY directions as indicated by the arrows in the drawing.

The trimming position may be specified visually, but is determined by capturing the projected image of the film with a television camera and observing it on a television monitor. A computer system capable of cursor control is provided, and a trimming position can be designated by a cursor or the like with respect to a projected image of a film projected on a television monitor.

In this case, the positions of the exposure table and the enlargement lens can be calculated by the computer from the position designated by the cursor, and can be automatically set. The film and its holding mechanism need only have a fixed or fixed feeding mechanism.

FIG. 2 is a perspective view for explaining an example of the structure of the photo printing apparatus according to the present invention. The chain line in the figure indicates the optical axis. The optical axis from the negative mask 1 loaded with the negative film extends and passes through the lens 2 to reach the exposure table 3 on which the photographic paper is placed. In the present invention, the negative mask is fixed,
The enlargement lens and the exposure table move.

In the example of this figure, a ball screw which is rotated by a motor is fixed to a lens plate and an exposure table with a nut.
Moving on a slide rail. The enlargement lens 2 with the motor 4 for focus adjustment is installed on a lens plate 14, and a ball screw 8 is fixed to the lens plate 14 with a nut. When the ball screw 8 is rotated by the motor 5,
Can move on the slide rail 11.

The slide rail is provided below the lens plate 15, and the ball screw 9 similarly fixed by a nut is rotated by the motor 6 so that the lens plate lower 15 moves on the slide rail 12. The exposure table 3 can also move on the slide rail 13 when the ball screw fixed by the nut is rotated by the motor 7.
Further, the exposure surface can be moved in a direction perpendicular to the slide rail 13 by a roller.

The trimming method of the photographic printing apparatus according to the present invention will be specifically described. Fig. 3 (1) (2) (3)
FIG. 3 is an explanatory view showing a procedure of a trimming method of the photo printing apparatus according to the present invention. As shown in FIG. 3 (1), a negative film is loaded with a negative mask, an image on the negative film is captured by a television camera, and projected on a television monitor as shown in FIG. 3 (2).

A cursor control device is incorporated in the image processing unit for controlling the television monitor, and a numerical value can be input from a console. A computer that performs calculations from the position specified by the cursor is connected.

As shown by a dotted line in FIG. 3C, trimming is designated by a cursor. In this case, a trimming frame is input and displayed by specifying _two cursors P ₁ and P ₂ at the upper left and lower right of the desired trimming range on the monitor screen.

The positions of the two points P ₁ and P ₂ specified by the cursor are read into the computer from the monitor image, the X and Y distances are obtained, and the X: Y ratio that exceeds the set print X: Y ratio is determined. The print size and the enlargement ratio are calculated with priority.

Also, the center point of the trimmed image is calculated from the positions of the two points P ₁ and P ₂ , and the displacement of the lens plate and the exposure table is adjusted so that the center point and the centers of the lens and the printing paper are substantially on the same line. Calculate the amount.

According to the calculated displacement, the lens plate and the exposure table are moved to appropriate positions, and a desired trimming range is printed.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a position adjusting mechanism used in a trimming method for a photographic printing apparatus according to the present invention will be described below. 4 and 5 are views showing an embodiment of a position adjusting mechanism of a stretching lens of the photographic printing apparatus according to the present invention. FIG. 4 is a sectional view in the X direction, and FIG. 5 is a sectional view in the Y direction.

The stepping motor 17 is a ball screw 9
Are connected to the lower lens plate 15, and a stepping motor 16 is connected to the upper lens plate 14. The lower lens plate 15 is supported on a table by a slide rail 12, and the upper lens plate 14 is supported on the lens plate 11 by a slide rail 11.

As shown by an arrow in FIG. 4, the lens plate 15 is
Is moved in the X direction. As shown by the arrow in FIG. 3, the stepping motor 16 moves the lens plate 14 on which the stretching lens 4 is fixed in the Y direction. Each stop position is controlled by the rotation angle of the pulse of the stepping motor.

6 and 7 are views showing an embodiment of the position adjusting mechanism of the exposure table of the photographic printing apparatus of the present invention. FIG. 6 is a sectional view in the direction of the roller, and FIG. 7 is a sectional view of a vertical plane including the roller shaft. FIG. As shown in FIG. 6, in the Y direction of the arrow,
The transport belt is moved by rotating a transport belt stretched on the exposure table by a stepping motor.

On the exposure table, the photographic paper is fixed by receiving a suction force from the internal suction box through the holes of the conveyor belt. As can be seen from FIG. 7, the exposure table is attached to the ball screw via a nut, and the exposure table is moved by the rotation of the stepping motor in the X direction indicated by the arrow.

[0031]

According to the photographic printing method and apparatus of the present invention, since the magnified image is controlled on the monitor instead of the image of the negative film, the trimming position can be easily set, and the negative film can be manually set. There is no risk of soiling the negative film because it can be trimmed without moving.

Further, since the lens can be moved together with the exposure table, there is an effect that projection can minimize image distortion.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an example of a position adjusting mechanism used in a trimming method of a photo printing apparatus according to the present invention.

FIG. 2 is a perspective view illustrating an example of the structure of a photo printing apparatus according to the present invention.

FIG. 3 is an explanatory diagram showing a procedure of a trimming method of the photographic printing apparatus of the present invention.

FIG. 4 is a sectional view in the X direction showing an embodiment of a position adjusting mechanism of a stretching lens of the photographic printing apparatus of the present invention.

FIG. 5 is a sectional view in the Y direction showing an embodiment of a position adjusting mechanism of a stretching lens of the photographic printing apparatus of the present invention.

FIG. 6 is a cross-sectional view in a roller direction showing an embodiment of a position adjusting mechanism of an exposure table of the photographic printing apparatus of the present invention.

FIG. 7 is a vertical sectional view including a roller shaft, showing an embodiment of a position adjusting mechanism of an exposure table of the photographic printing apparatus of the present invention.

FIG. 8 is a schematic view showing an example of a conventional photographic printing and developing apparatus.

FIG. 9 is a perspective view showing an example of a transport mechanism of a conventional photographic printing and developing apparatus.

FIG. 10 is a cross-sectional view illustrating an example of a transport mechanism of a conventional photographic printing and developing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Negative mask 2 Stretching lens 3 Exposure table 4 Stretching lens motor 5 Motor 6 Motor 7 Motor 8 Ball screw 9 Ball screw 10 Ball screw 11 Slide rail 12 Slide rail 13 Slide rail 14 Lens plate 15 Lens plate 16 Stepping motor 17 Stepping motor 18 Stepping motor 19 Nut 20 Nut 21 Nut 22 Negative film 23 Printing paper 24 Conveying belt 31 Cursor 32 Cursor control device 33 Television monitor 34 Console 35 Monitor screen 51 Exposure unit 52 Developing unit 53 Drying unit 54 Printing paper 55 Feed roller 56 Cutter 57 Conveyor belt 58 Suction Box 59 Exposure device 60 Exposure table 61 Magazine 62 Entrance guide 63 Belt 4 the motor 65 exit guide 66 suction fan 67 motor

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-49-24129 (JP, A) JP-A-2-79829 (JP, A) JP-A-3-153228 (JP, A) (58) Investigation Field (Int.Cl. ⁶ , DB name) G03B 27/32 G03B 27/46

Claims (2)

(57) [Claims] 1. A photographic printing apparatus comprising a negative mask, a stretching lens and an exposure table, wherein trimming adjusting means for moving at least the stretching lens and the exposure table in parallel to a negative film surface loaded on the negative mask is provided. A photo printing apparatus characterized by the above-mentioned. 2. In a photo printing method for performing trimming, an image of a negative film is photographed by a television camera and displayed on a television monitor together with a trimming position setting cursor.
From the specified trimming position, the magnification of the stretching lens and the amount of parallel displacement for trimming adjustment of the stretching lens and the exposure table are calculated, and the magnification of the stretching lens, the stretching lens and / or the exposure table are parallel-displaced according to the calculated values. A photographic printing method characterized by performing stretching exposure by stretching.