JPH0392839A - Exposure adjusting device for photograph printing device - Google Patents

Abstract

PURPOSE:To correctly and readily adjust exposure by allowing a screen to advance and retreat in an optical path between a negative film and photographic paper so that the screen is positioned almost in the same plane as the exposure plane of the photographic paper. CONSTITUTION:Previous confirmation of an exposure condition and adjustment of exposure conditions are required prior to exposure, and therefore the screen 30 is set to the front surface of an exposure base 10. The front surface of the screen 30 is made of an almost white plate. For adjustment, the screen is set to the exposure base 10 to project images on the negative film F, and an operator can confirm them through a peeping window. Upon the completion of adjustment, the screen 30 turns toward an arrow and erects, whereby it retreats from the optical path L. Consequently, exposure to the photographic paper P is ready. Thus, the optical path for exposure adjustment becomes identical to one for actual exposure, and easy, correct exposure adjustment ensures high reproducibility after adjustment.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a photographic printing apparatus that prints an image of a negative film onto photographic paper, in which the image of the negative film is projected onto a screen and a print is made based on the image on the screen. The present invention relates to an exposure adjustment device that adjusts exposure conditions for paper.

[Conventional technology]

Photographic printers have conventionally been equipped with an exposure adjustment function in order to improve the reproducibility of negative film images and to enhance specific colors. This exposure adjustment is performed by projecting an image from a negative film onto a white screen, measuring a specific part of the image projected on the screen (for example, a person's face) spot-wise, and based on the measurement data. . Conventional exposure adjustment devices include a reflective mirror that can be inserted into the optical path from the negative film to the photographic paper, and
A screen is placed outside the optical path (Japanese Patent Publication No. 42766/1983). This device projects an image of the negative film onto the screen by inserting a reflective mirror into the optical path between the negative film and photographic paper to reflect the light transmitted through the negative film and guide it to the screen. Exposure adjustment is then performed based on the negative film image projected onto the screen.

[Problem to be solved by the invention]

However, in conventional devices, the screen for adjusting the exposure is installed outside the optical path for exposure between the negative film and the photographic paper that actually exposes the photographic paper, and the optical path of the screen is changed when adjusting the exposure. Not direct. For this reason, there is little correlation between exposure adjustment and actual exposure, and printing may not be possible according to exposure adjustment. Further, since the image projected onto the screen is an image reflected by a reflecting mirror, the image is likely to be distorted and is inverted from the image on the photographic paper, making it difficult to see.

SUMMARY OF THE INVENTION An object of the present invention is to provide an exposure adjustment device for a photographic printing apparatus that solves the above-mentioned problems by making the optical path for exposure adjustment the same as the optical path for actual exposure.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an exposure adjustment device for a photographic printer that projects an image of a negative film to be exposed onto photographic paper onto a screen and adjusts the exposure conditions for the photographic paper based on the image on the screen. The present invention is characterized in that the screen is movable forward and backward relative to the optical path between the negative film and the photographic paper so that the screen is positioned substantially on the same surface as the exposed surface of the photographic paper.

[Effect]

By inserting a screen into the optical path between the negative film and photographic paper, the image of the negative film is directly projected onto the screen and exposure adjustment is performed. The screen inserted into the optical path is on the same surface as the photographic paper, allowing exposure adjustment to be performed under the same conditions as actual exposure.

〔Example〕

FIG. 1 shows an overall perspective view of the external appearance of a photographic printing apparatus to which the present invention is applied, in which an exposure section 1 for printing an image of a negative film onto photographic paper is located on the left side, and the exposed photographic paper is subjected to development and fixing processing. The exposure section 1 and the processing section 2 are entirely covered by a housing to prevent external light from entering.

A light source section 3 for irradiating light onto the negative film is attached to the upper panel of the exposure section 1, and a monitor means (monitor television 5) for projecting the image of the negative film on a monitor screen 4 is attached.
) is attached.

Furthermore, a viewing window 6 for looking into the exposure section 1 is formed in the front portion of the top panel. On the other hand, in the processing section 2, processing tanks such as a developing processing tank, a fixing processing tank, and a washing tank (all not shown) are arranged in order, and photographic paper is sequentially placed between these processing tanks. After being transported and dried appropriately through a dryer, it is discharged.

FIG. 2 shows the internal structure of the exposure section 1. A light source 7 is provided in the light source section 3, and a set table 8 is provided below the light source 7.
, a rotary table 9 are arranged in this order, and an exposure table 10 is further provided below the rotary table 9. The photographic paper P is supplied onto the exposure table 10 and exposed to light, thereby printing an image on the negative film F.

The setting table 8 is used to set the negative film F through a negative carrier (not numbered) so that it is located directly below the light source 7, and is set in the XY direction within a horizontal plane by an appropriate drive source such as a motor or cylinder. The movement is adjustable. By adjusting the movement of the set table 8, the negative film F is moved below the light source 7, and trimming processing such as partial enlargement or deletion of the image becomes possible.

On the rotary table 9, optical members such as a large number of lenses (not shown) having different magnifications and a reflecting mirror 11 are arranged at regular intervals on the same circumference. This rotary table 9 is rotated to set a lens matching the exposure magnification in the optical path from the light source 7 that has passed through the negative film F, or to set the reflective mirror 11 in the optical path. . In the illustrated example, a reflection mirror 11 is provided below the light source 7.
Indicates the state where is set.

Further, an exposure sensor (not shown) is arranged around the rotary table 9 to detect the transmitted light of the negative film F.
Exposure control circuit (not shown) that automatically controls exposure conditions such as the insertion amount of (yellow), M (magenta), and C (cyan) color filters into the optical path and shutter operation for brightness adjustment.
It is designed to send signals to.

The photographic paper P is set in a rolled state, and the roll paper 12 of the photographic paper P is stored in a magazine 13 attached to the right side of the exposure section 1 in FIG. This photographic paper P is sequentially pulled out from the roll paper 12 and supplied onto the exposure table 10, and after being exposed on the exposure table 10,
It is carried into the conveyance path 20 and transferred from the conveyance path 20 to the processing section 2.
(See Figure 1). Turn rollers 14 and 15 are disposed upstream and downstream of the exposure table 10 to change the direction of the photographic paper P. In addition, the conveyance path 20
A cutter 16 for cutting the exposed photographic paper P into a predetermined length is provided on the population side.

In the illustrated example, the cutter 16 is provided in the artificial part of the conveyance path 20, that is, between the exposure table 10 and the left turn roller 15, and cuts the photographic paper P after the photographic paper P is carried into the conveyance path 20. It is designed for cutting.

Then, the exposed photographic paper P that has been cut is carried out from the conveyance path 20 to the processing section 2, but the unexposed photographic paper P has advanced from the leading end or the exposure table 10 to the front of the cutter 16. The unexposed photographic paper P is returned to the front of the exposure table 10 so that this leading end portion is also exposed. A buffer guide 17 provided in an upright manner above the right turn roller 14 operates during the feedback 7 of the photographic paper P. This buffer guide 1
Reference numeral 7 has a guide on one side (right side) that rotates in the opening direction, and when the photographic paper P is pulled back, it opens and the pulled back photographic paper P is moved to the buffer guide 17.
The part forms a loop and is stored in this state.

Note that an easel mask (not shown) is set on the exposure table 10 in order to expose the photographic paper P to a set size. This easel mask has a transparent window according to the set size, and by feeding the photographic paper P between the easel mask and the exposure table 1o, exposure is performed at the set size. .

In the figure, reference numeral 18 denotes a printer installed in the middle of the transport path 20 for photographic paper P. This printer 18 prints the exposure conditions for exposing the photographic paper, the exposure date, ID data such as the user name, etc. on the back side of the photographic paper P. For example, by printing the exposure conditions, it is possible to print the same negative film F. There is an advantage that it can be used as a guide when reprinting.

In the above configuration, the light emitted from the light source 7 passes through the negative film F on the set table 8, and then passes through the rotary table 9.
The optical path L passes through the lens of the exposure table 10.
The upper photographic paper P is exposed to light to print an image on the negative film F. Prior to this exposure, it is necessary to check the exposure state in advance and adjust the exposure conditions. Therefore, in this embodiment, the screen 30 is set on the upper surface of the exposure table 10. The screen 30 is made of a plate whose upper surface is almost white, and when performing the above-mentioned adjustment, etc., it is set on the exposure stage 10, onto which the image of the negative film F is projected, and the operator can see through the viewing window 6 (see FIG. 1). You can check from.

After the adjustment is completed, the screen 30 exits the optical path L by rotating in the direction of the arrow in the figure and standing up.

This makes it possible to expose the photographic paper P.

A reflecting mirror 11 attached to the rotary table 9 reflects the transmitted light of the negative film F in a direction perpendicular to the optical path L, and one CCD camera connected to a monitor television 5 is provided to monitor the image of the negative film F. , monitor tv 5
An image of a negative film F is manually inputted from a CCD camera 19, and the image is displayed on the monitor screen 4.

Since the operator can adjust the color density and brightness or perform trimming while viewing the image on the monitor screen 4, these operations can be easily performed.

FIG. 3 shows details of the screen 30 portion, and the screen 30 is stretched within a screen frame 31. One side of the screen frame 31 is rotatably supported by a bracket 32, and as the screen frame 31 rotates, the screen 3o enters into the optical path L to cover the exposure table 10, or when exposed. It operates to stand up on one side of the table 10 and exit from the optical path L. Therefore, the tip of a wire 33 is connected to the opposite side of the screen frame 31 from the pivot point of the bracket 32, and the base end of this wire 33 is connected to the output shaft of a motor 34.
The above operation is performed by winding or pulling out the wire 33 by rotating the wire 33 in the forward and reverse directions. Then, as the screen frame 31 falls onto the exposure table 10, the image of the negative film F is projected onto the screen 30, exposure adjustment is performed, and the screen frame 31
By rising up, printing is performed on the photographic paper P supplied onto the exposure table 10.

Incidentally, indication lines such as a center reference point 30a and a size scale 30b are appropriately printed on the upper surface of the screen 30, so that the positioning of the projected image can be easily performed. Furthermore, a photometric means 35 having multiple sensors is attached to the screen 30. Photometry means 3
Reference numeral 5 measures the R, G, B and brightness of the image of the negative film F projected on the screen 30, and exposure adjustment for printing is performed based on the photometric data measured by the full light means 35.

The photometry by the photometry means 35 is performed on a specific position (for example, a person's face) of the image projected on the screen 30. Therefore, the photometry means 35 is used in the X and Y directions with respect to the screen 30. It is possible to move in two-dimensional directions.

Such movement is achieved by using a pair of X-axis arms 36 on the screen frame 31.
is installed. This X-axis arm 36 is connected to the Y-axis arm 37.
is spanned over the Y-axis arm 3, and the photometry means 35
This is done by attaching the slide arm 38 provided at 7.

Then, the Y-axis arm 37 slides relative to the X-axis arm 36 by the motor 39, and the slide arm 38 slides relative to the Y-axis arm 37 by the motor 40, so that the photometry means 35
0 in a two-dimensional direction.

Such a screen 30 stands up and leaves the optical path L when exposing the photographic paper P, but rotates downward to cover the exposure table 10 when adjusting exposure. As a result, the screen 30 has negative film F and photographic paper P (
That is, it enters the optical path L between the exposure table 10),
Its stopping position is arranged to be approximately on the same surface as the photographic paper P.

That is, the screen 30 is at approximately the same height as the photographic paper P, and the image of the negative film F is projected on the photographic paper P in the same manner as the actual exposure. As a result, the state of exposure adjustment by the screen 30 and the state of actual exposure to the photographic paper P are very similar, so that the reproducibility of the exposure adjustment is improved. Further, as described above, since the image of the negative film F is projected on the screen 30 within the optical path L (the optical path for exposure) between the negative film F and the photographic paper P, the image of the negative film F is directly projected onto the screen 30. Projection is performed. Therefore, since there is no image distortion or image reversal, exposure adjustment can be performed accurately and easily.

FIG. 4 shows a state in which the screen 30 is removed from the optical path L. By driving the motor 34 in the reverse direction and winding up the wire 33, the screen 30 rotates in the upright direction about the pivot point of the bracket 32 and exits from the optical path L. As a result, the photographic paper P fed onto the exposure table 10 is exposed to light, and the image on the negative film F is printed. When the screen 30 is in the upright state, the weight of the screen 30 applies a load to the output shaft of the motor 34, so it is necessary to reliably lock the motor 34 against this load.

FIG. 5 shows an example of a locking mechanism that performs this locking,
A pulley 41 for winding up the wire 33 of the screen 30 is attached to the output shaft 34a of the motor 34. A ratchet gear 42 is attached to the booby 41 so as to rotate integrally therewith, and a ratchet pawl 43 is engaged with the ratchet gear 42. The ratchet pawl 43 is biased by a spring 44 in the direction of engagement with the ratchet gear 42, and the engagement of the ratchet pawl 43 locks the rotation of the bobbin 41 in the direction in which the wire 33 is drawn out, and the screen 30 is maintained in an upright state. It is supposed to be done. In this case, the rotation of the pulley 41 in the winding direction of the wire 33 is not locked, so that the screen 30 can be rotated upright by the drive of the motor 34.

Reference numeral 45 denotes a solenoid that pulls down the ratchet pawl 43 in the engaging direction. When the solenoid 45 is driven, the ratchet pawl 43 is disengaged from the ratchet gear 42, and the rotation lock in the wire drawing direction is released. Therefore, the screen 30 is rotated in the direction of the exposure table 10 by driving the motor 34.

Note that the present invention is not limited to the above embodiments, and various modifications can be made. For example, a flexible sheet may be used as the screen 30, and this sheet may be wound or pulled out from the wound state and moved forward and backward into the optical path L between the negative film F and the photographic paper P. .

〔Effect of the invention〕

As described above, in the present invention, the screen for exposure adjustment is moved into or out of the exposure optical path between the negative film and the photographic paper, so that the exposure adjustment optical path and the actual exposure optical path are different. The results are the same, the reproducibility of exposure adjustment is good, and exposure adjustment can be performed accurately and easily.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a photographic printing apparatus to which the present invention is applied, FIG. 2 is a cross-sectional view of the exposure section seen from the back, and FIG. 3 is a perspective view showing the main parts of an embodiment of the present invention. FIG. 4 is a perspective view showing its operation, and FIG. 5 is a sectional view showing an example of the screen locking mechanism. 1... Exposure section, 2... Processing section, 3... Light source section, 4
...Monitor screen, 5...Monitor TV, 6...Peep window, 7...Light source, 8...Set table, 9...
- Rotating table, 10... Exposure stand, 12... Roll paper, 13... Magazine, 14.15... Turn roller, 16... Cutter 17... Buffer guide, 18
...Printer, 19...CCD camera, 20...
Conveyance path, 30... Screen, F... Negative film, P... Photographic paper, L... Light path.

Claims (1)

[Scope of Claims] An exposure adjustment device for a photographic printer that projects an image of a negative film to be exposed onto photographic paper onto a screen and adjusts exposure conditions for the photographic paper based on the image on the screen, wherein the screen is 1. An exposure adjustment device for a photographic printing apparatus, characterized in that it is movable forward and backward with respect to an optical path between the negative film and the photographic paper so as to be positioned substantially on the same plane as the exposed surface of the photographic paper.