JPH07333741A - Film information detecting device for photographic printer - Google Patents

Abstract

PURPOSE:To provide a film information detecting device for a photographic printer which is improved so that its reliability is enhanced and that an increase in processing speed is achieved. CONSTITUTION:This film information detecting device for a photographic printer includes a film information detection means B1 for detecting information recorded on film; a feedback value signal means B2 for a value outputted from the film information detection means B1 when no film exists; a reference value signal means B3 for outputting a reference signal for a desired value hen no film exists; a comparison means B4 for comparing the reference value signal with the reference value signal; and an adjustment means B5 for adjusting the film information detection means B1 according to the signal comparison means B4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film information detecting device for a photo printing machine, and more particularly, information on a photographing screen recorded on a photo film used for a photo printing machine,
The present invention relates to a film information detection device for a photo printing machine, which reliably detects information such as DX code information and frame NO code information.

[0002]

2. Description of the Related Art Conventionally, a film information detecting device for a photographic printing machine is provided with a film information detecting portion for detecting information recorded on the film, and an output value of the film information detecting portion when there is no film is detected. In some cases, the target value when there is no is adjusted and fixed at the time of shipment. Further, there are many kinds of films, and the transmission densities of the film bases are different from each other. Therefore, the accuracy of the film detector is required.

However, the output value when there is no film may change due to changes over time in the optical sensor and amplifier of the film information detecting section, dust, fatigue of electric parts, and the like. For example, when the output value is lowered, the S / N ratio is deteriorated, and it becomes difficult to correctly detect the information recorded on the film.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to detect a film information for a photographic printer with high reliability for detecting information recorded on a film. To provide.

[0005]

The above object can be achieved by the following means. That is, (1) film information detecting means for detecting information recorded on the film, and feedback value signal means having a feedback value having a constant relationship with the output value of the film information detecting means when the film is not present. , Reference value signal means for outputting a reference value signal of a target value when there is no film, signal comparing means for comparing the feedback value signal and the reference value signal, and the film information detecting means by the signal comparing means A film information detecting device for a photoprinting machine, comprising: (2) information recorded in the film is at least photographing screen position information, DX code information, frame NO code (3) The film information detecting device for a photoprinting machine according to (1), characterized in that (1) A film information detecting device for a photoprinting machine according to (1), which detects at least information by a bar code recorded on the film, and (4) the film information detecting means includes at least a transmissive optical sensor. Any one of (1) to (3) characterized by including
(5) The film information detecting device for a photo printing machine according to the item (5), wherein the film information detecting device is automatically adjusted in the self-diagnosis mode of the photo printing machine (1).
(6) The film information detecting device for a photo printing machine according to any one of (4) to (4), wherein (6) the film information detecting device for a photo printing machine according to (1) has an abnormality in the adjusting means of the film information detecting means. A film information detecting device for a photoprinting machine, comprising: an adjustment abnormality detecting means for detecting, (7) a film information detecting means for detecting information recorded on the film, and the film information detecting means Feedback value signal means having a feedback value having a constant relationship with the output value of the standard transmission density plate; reference value signal means for outputting a reference signal of the target value of the standard transmission density plate;
A film information detecting apparatus for a photoprinting machine, comprising: a signal comparing means for comparing the feedback value signal with the reference value signal; and an adjusting means for adjusting the film information detecting means by the signal comparing means. Is.

Here, "information recorded in the film"
Is the information in which the film-specific values required at the time of printing are recorded. For example, the DX that has been previously burned into the film.
The code information, the frame NO code information, the information of the position of the photographed image plane, and the like. The "film information detecting means" means an optical sensor, an amplifier, etc. for detecting the information recorded on the film. The "feedback value signal" means a signal of a value used for feedback which has a fixed relationship with the output value of the film information detecting means at the time of checking. The “reference value signal” means a signal of a reference value having a fixed relationship with the target value. The "signal comparison means" means means for comparing in order to calculate how much the feedback value signal deviates from the reference value signal. The "adjusting means" is means for adjusting the film information detecting means. Further, the "photographic printing machine" means a device for printing the developed photosensitive material on photographic paper. The "shooting screen position" means the position of the screen on which the image is taken. Furthermore, the "DX code" is a code in which a value peculiar to the film, which is necessary for printing and appears by developing, is recorded. The "frame NO code" is a code indicating a frame number, which is a so-called frame NO code, which appears by developing. The "transmissive optical sensor" is an optical sensor that sees information of the film by light transmission. The "self-diagnosis mode" is a mode for making a diagnosis in order to check whether the photoprinting machine operates normally, and the self-diagnosis mode may be at any timing.

[0007]

The operation constituted as described above will be explained with reference to the operation of claim 1. FIG. 1 is a schematic block diagram of the present invention, showing an output value of the film information detecting means (B1) when there is no film. A feedback value signal is obtained by the feedback value signal means (B2) having a feedback signal value having a fixed relationship. Next, the reference value signal means (B
In 3), the reference value signal of the target value when there is no film is output. Next, the signal comparing means (B4) compares the reference value signal with the feedback value signal. If there is a difference,
The output information is adjusted to the target value by adjusting the film information detecting means by the adjusting means (B5). By this,
When detecting the information recorded on the actual film, the output level of the information is optimized and the S / N ratio is increased,
Higher reliability of detection.

Further, according to the second aspect, as the information recorded on the film, at least the photographing screen position information, the DX code information, the frame NO code information and the like are detected.
Since the S / N ratio of each of the above information can be increased and high-speed detection is possible, the detection reliability is improved.

According to the third aspect of the present invention, since the film information detecting means detects at least the information in the bar code format recorded on the film, it becomes possible to detect the information of various films by the bar code.

According to the present invention, since the film information is detected by the transmissive optical sensor, the detection reliability is improved with a simple structure.

According to the fifth aspect of the present invention, the adjustment of the film information detecting device is performed in the self-diagnosis mode, so that the film information detecting device can be adjusted with a time margin.

According to the sixth aspect of the present invention, the abnormality in adjustment of the film information detecting means is detected by the adjustment abnormality detecting means, so that the abnormality can be immediately recognized.

Further, according to a seventh aspect of the present invention, the feedback value signal is obtained by the feedback value signal means of the feedback value having a fixed relationship with the output value of the film information detecting means by the standard transmission density plate. On the other hand, the reference value signal means outputs the reference value signal of the target value by the standard transmission density plate. next,
A signal comparing means compares the reference value with the feedback value. If there is a difference, the adjusting means adjusts the film information detection to adjust the output value to the target value. As a result, when detecting the film information, the output level is optimized, the S / N ratio is increased, and the detection reliability is improved.

[0014]

Embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 2 is a schematic explanatory view of a film information detecting device for a photo printing machine. As shown in the figure,
The film information detecting means 10 detects the information recorded on the film by an optical sensor, an amplifier or the like. The photographing screen position detector 11 is a detector for detecting the photographing screen position, the DX code detector 12 is a detector for detecting a DX code, and the frame NO code detector 13 is a detector for outputting a frame NO code. . Further, the splice detector 14 detects a portion where the roll-shaped film is stuck with an adhesive tape or the like so that the roll-shaped film can be continuously printed, and detects a change of the roll-shaped film or the like. Since a transmissive optical sensor is used as the detector, the structure is simple and the detection accuracy is high. The feedback value signal means 30 is a feedback value signal used for feedback having a fixed relationship with the output value of the film information detecting means when there is no film. On the other hand, the reference value signal of the reference value signal means 40 is a reference value signal having a fixed relationship with the target value when there is no film. Further, the signal comparing means 50 is means for comparing in order to calculate how much the feedback value deviates from the reference value. The adjusting means 60 switches a plurality of resistors to adjust the amplifier of the film information detecting means. The transport roller 70 is a roller that transports the film F. The photographing screen position F1 means the position of the photographed screen, and the DX code F2 is a code in which a film-specific value necessary for printing, which appears when developed, is recorded. Further, the frame NO code is a code pre-burned on the film. The CPU control unit 81 is a control unit of the CPU. The keyboard 82 is a keyboard for inputting switching between the self-diagnosis mode and the normal operation mode. Further, the stepping motor drive unit 83 drives the carry roller 70.

The detector of another application may be one for counting the number of perforations of the film F.

Although the adjustment of the film information detecting means is performed in the self-diagnosis mode, the adjustment may be performed, for example, during daily inspection or at any time if necessary.

FIG. 3 is a flow chart of the adjustment of the film information detecting apparatus, and specific numerical values will be described with reference to FIGS. 3 and 4. First, the self-diagnosis mode is selected with the keyboard 82 and switched to the self-diagnosis mode (F01). Next, the output value of the optical sensor when there is no film in the DX code detector 12 is measured to obtain, for example, an output value of 3V (F02). Here, the feedback value signal means 30 performs A / D conversion to divide 5V into 2 256 "256" to obtain a feedback value "153" corresponding to 3V (F03). Here, the reference value signal means 40 calculates, for example, how much the value deviates from the reference value "242" of the target value "4.75" V (F04), and then the adjusting means 60 adjusts the gain of the amplifier. Is selected and adjusted so that the output value of the film information detecting means becomes "4.75" V (F05). Here, it is checked whether or not the adjustment is possible (F06), and if possible, go to the next step. If it is impossible, the adjustment impossible is displayed (F07). Next, the frame NO code detector is executed (F08). Check if adjustment is possible here (F09). If possible, proceed to the next step, and if impossible, display the above-mentioned adjustment impossible (F07). Further, the photographing screen position is performed (F10). Check if the above adjustment is possible (F11). If it is adjustable, go to the next step. If it is impossible, the above-mentioned adjustment impossible is displayed (F07). When all adjustments are completed, the self-diagnosis mode is switched to the normal use mode (F12). The adjustment is performed by the above flow. As a result, the information recorded on the actual film can be detected.

(Embodiment 2) Next, an adjustment example of the film information detecting means using a standard transmission density plate will be described with reference to the drawings. Note that the same configuration as that of the first embodiment will be omitted.

FIG. 4 is a perspective view of the main part of the detector. As shown, the standard transmission density sheet 66 is a sheet having a standard transmission density value that is designed to come in and go out between the LED of the detector and the optical sensor. The standard transmission density sheet 66 is held by a standard transmission density plate 65, and the standard transmission density plate 65 is operated by a solenoid 67. The spring 68 biases the standard transmission density plate 65 toward the solenoid.

Explaining the adjustment operation, first, a self-diagnosis mode is selected by a keyboard (not shown) and switched to the self-diagnosis mode. Next, the output value of the optical sensor 16b at the time of the standard transmission density plate is measured by illuminating the LED 11a of the DX code detector to obtain, for example, the output value 3V. Here, the feedback value signal means described in FIG. 2 performs A / D conversion to divide 5V into 2 256 "256" to obtain a feedback value "153" corresponding to 3V. Here, the reference value signal means explained in FIG. 2 calculates how much the value is deviated from the reference value “242” of the target value “4.75” V, and the film information is detected by the adjusting means explained in FIG. Adjust so that the output value of the means is "4.75" V. Similarly, other detectors are also used. When all adjustments are completed, the self-diagnosis mode is switched to the normal use mode. The adjustment is performed as described above. As a result, correct film information can be detected.

[0022]

Since the present invention is configured as described above, it has the following effects.

The effect of claim 1 is that by adjusting the output value of the film information detecting means in the absence of film to be constant, the output level becomes appropriate when the information actually recorded in the film is detected. , S / N ratio can be increased, and detection reliability is improved.

Further, the effect of claim 2 is that the information recorded on the film is at least the screen position, the DX code, and the frame NO code, so that the reliability of the detection of each of the information is improved.

Further, the effect of claim 3 is that the film information detecting means can detect at least the information of the film by the bar code, so that it can be used for the film information having the bar code such as the DX code system.

Further, according to the effect of claim 4, since various film information is detected by the transmission type optical sensor, the detection reliability is improved with a simple structure.

Further, the effect of claim 5 is that the automatic correction of the film information detecting device is performed in the self-diagnosis mode, so that the adjustment can be made with a leeway in time, and in general there is no film. It is easy to adjust because it has become.

Further, according to the effect of the sixth aspect, when the film information detector cannot be adjusted, the abnormality is detected, so that the failure can be prevented in advance.

Further, the effect of claim 7 is that the standard transmission density plate is made to have a transmission density close to the base transmission density of the film to be actually processed, and the output value of the film information detector can be made large. This further increases the detection accuracy.

[Brief description of drawings]

FIG. 1 is a schematic configuration block diagram of claim 1.

FIG. 2 is a schematic explanatory view of a film information detecting device for a photo printing machine according to the first embodiment.

FIG. 3 is a flowchart of adjustment of the film information detecting means according to the first exemplary embodiment.

FIG. 4 is a perspective view of a main part of a detector according to a second embodiment.

[Explanation of symbols]

 10 Film information detecting means 11 Shooting screen position detector 12 DX code detector 13 Frame NO code detector 14 Splice detector 15 LED 16 Optical sensor 20 Amplifier 21 Shooting screen position detecting amplifier 22 DX code detecting amplifier 23 Frame NO code detecting amplifier 24 Splice detection amplifier 30 Feedback value signal means 40 Reference value signal means 50 Signal comparison means 60 Adjustment means 65 Standard transmission density plate 66 Standard transmission density sheet 67 Solenoid 68 Spring 70 Conveying roller 81 CPU control unit 82 Keyboard 83 Stepping motor drive unit 84 Adjustment abnormality detection means F film F1 shooting screen position F2 DX code F3 film NO

Claims (7)

[Claims] 1. A film information detecting means for detecting information recorded on a film, and a feedback value signal means having a feedback value having a constant relationship with an output value of the film information detecting means when the film is not present. ,
Reference value signal means for outputting a reference value signal of a target value when there is no film, signal comparing means for comparing the feedback value signal and the reference value signal, and the film information detecting means by the signal comparing means. A film information detecting device for a photo printing machine, comprising: an adjusting means. 2. Information recorded on the film is:
The film information detecting device for a photo printing machine according to claim 1, wherein the film information detecting device comprises at least photographing screen position information, DX code information, and frame NO code information. 3. A film information detecting apparatus for a photoprinting machine according to claim 1, wherein said film information detecting means detects at least information based on a bar code recorded on the film. 4. The film information detecting means includes at least a transmissive optical sensor.
A film information detecting device for a photo printing machine according to any one of 1. 5. A film information detecting device for a photo printing machine according to claim 1, wherein the film information detecting device is automatically adjusted in a self-diagnosis mode of the photo printing machine. . 6. The film information detecting device for a photographic printing machine according to claim 1, further comprising an adjustment abnormality detecting means for detecting an abnormality of the adjusting means of the film information detecting means. Information detection device. 7. A film information detecting means for detecting information recorded on the film, and a feedback value signal means having a feedback value having a constant relationship with an output value of the standard transmission density plate of the film information detecting means, Reference value signal means for outputting a reference signal of the target value of the standard transmission density plate, signal comparing means for comparing the feedback value signal with the reference value signal, and adjustment for adjusting the film information detecting means by the signal comparing means. A film information detecting apparatus for a photo printing machine, comprising: