JP2685342B2 - Photo film transport control method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a photographic film transport control method for transporting a photographic film and stopping it at a predetermined position.

[Conventional technology]

It has been proposed to apply a transparent magnetic material to a photographic film, especially a negative film (magnetic recording layer), and magnetically record information specifying the negative film and information specifying an image printed on the negative film.

According to this, it is possible to store the information corresponding to each image frame, so that it is possible to save the trouble of searching and the like. For example, when printing on photographic paper, the exposure amount at the time of printing is recorded for each image frame. Can be set. Therefore, at the time of reordering, the printing process can be performed under the same conditions by reading the recorded exposure amount and the like.

Also, when the negative film is loaded into the camera for shooting, the shooting conditions and the like are recorded by the recording head provided in the camera, which serves as a reference during the printing process.

By the way, in the photographic negative film with the magnetic recording layer,
One perforation is provided for the image frames taken, etc., and when the negative film is conveyed and the image frames are sequentially stopped at a predetermined position, the perforation is detected to stop the film. .

[Problems to be solved by the invention]

However, when the negative film is loaded into the camera and the conveyance of the negative film is stopped every time an image is captured, a DC motor is used as the driving means, and due to the characteristics of the DC motor, it is necessary to detect the perforation and then stop. Overrun occurs. The amount of this overrun is the mechanical dimensional tolerance (gear etc.) of the drive system, the battery voltage, the number of frames at the end of shooting (roll diameter),
It varies depending on the stop of each image frame due to variations in pulling output due to the resistance of the telem.

On the other hand, the negative film that has been photographed and developed is positioned at the verification position of the verification machine or the printing position of the printing apparatus. A pulse motor is applied to the driving means of such equipment. . This pulse motor has a characteristic that there is no overrun from the detection of the perforation to the stop, and the stop accuracy is good.

In this way, when the same negative film is conveyed by different driving means (DC motor, pulse motor), the stop accuracy of each is different, so the captured image frames can be positioned at the proper verification position or printing position. Can not.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a photographic film transport control method capable of detecting the perforation and making the stopping positions coincide with each other even if the driving means are different.

[Means for solving the problem]

The invention described in claim (1) is a photographic film provided with a perforation corresponding to each image frame of a photographic film provided with a magnetic recording layer, and stopping at a predetermined position by detecting the perforation. A transport control method, wherein when the image frame is stopped at a predetermined position, overrun information from the detection of the perforation to the stop is recorded in the magnetic recording layer, and the same image frame is recorded at another predetermined position. In the case of positioning, the amount of conveyance of the photographic film after detecting the perforation is controlled based on the overrun information recorded on the magnetic recording layer.

The invention according to claim (2) is characterized in that the predetermined position is a photographing position of an image by a camera, and the other predetermined position is a verification position or a printing position of the image after development processing is completed. There is.

The invention described in claim (3) is a photographic film which is provided with a perforation corresponding to each image frame of the photographic film provided with a magnetic recording layer, and stops at a predetermined position by detecting the perforation. A conveyance control method, which corrects an error from the predetermined position after the image frame is stopped, and records the correction amount information in the magnetic recording layer,
When the same image frame is positioned at the predetermined position or another predetermined position, the amount of conveyance of the film after detecting the perforation is controlled based on the correction amount information recorded on the magnetic recording layer. I am trying.

In the invention according to claim (4), in any one of the above-mentioned claims (1) and (2), the overrun information is
It is characterized in that it is a count value of the number of bits of the magnetic recording signal.

The invention described in claim (5) is characterized in that, in the invention described in claim (3), the correction amount information is a count value of the number of bits of the magnetic recording signal.

[Action]

According to the invention described in claim (1), when the perforation is detected during the transportation of the photographic film, the transportation of the photographic film is stopped, for example, from the output of the stop signal until the photographic film is actually stopped. The overrun information of is recorded on the magnetic recording layer. After that, the amount of the photographic film conveyed is controlled based on the overrun information recorded on the magnetic recording layer at the time of positioning to another predetermined position. As a result, even if the transport system for transporting the photographic film is different, the transport control can be performed accurately.

According to the invention described in claim (2), if the invention described in claim (1) is applied to the case where the conveyance of the same photographic film is controlled between the camera and the photographic printing apparatus, respective When stopped at a predetermined position, the transport error in the camera can be corrected.

According to the invention described in claim (3), the error of the stop position is corrected at the first predetermined position, the correction amount information is recorded in the magnetic recording layer, and the correction amount information is recorded based on the recorded correction amount information. If it is used for the stop control at the next predetermined position (which may be the same position or another predetermined position), the accuracy of the transport control of the photographic film can be improved.

According to the invention described in claim (4) or (5), more accurate transport control can be performed by using one bit of the magnetic recording signal as a unit for the overrun information or the correction amount information.

〔Example〕

FIG. 1 shows a camera 10 and a photo printing apparatus 12 according to this embodiment. The camera 10 has a patrone in which a negative film F is wound around a spool 16 and housed therein.
18 are loaded.

As shown in FIG. 3, the negative film F is provided with an emulsion layer 52 on the upper surface of the transparent base 50 shown in FIG. 3 so that an image can be exposed and recorded. The third of the transparent base 50
On the lower surface of the figure, a magnetic recording layer 54 coated with a transparent magnetic material is provided. As shown in FIG. 4, this magnetic recording layer
54, a plurality of tracks (C0 to C3) continuously extending in the longitudinal direction of the negative film F outside the image frame range of the negative film F.
Are formed, and a film type ID, a user ID, and the like are recorded by a recording head 24 (see FIG. 1) described later.

The camera 10 is provided with a recording head 24 corresponding to the magnetic recording layer 54 of the negative film F, and when the negative film F is conveyed by the driving means, it is exposed and recorded on any of the tracks (C0 to 3). Predetermined information based on the image is recorded. Also, as shown in FIG.
The negative film F is provided with a perforation 60 at a position where the relative positions of the respective image frames coincide with each other. Further, a bar code 61 having a uniform interval is preliminarily attached to one end of the negative film F in the width direction. Has been done.

As shown in FIG. 2, the transport system of the negative film F in the camera 10 is composed of a DC motor 62 and a speed reduction unit 64 that applies the driving force of the DC motor 62 by the negative film F. The DC motor 62 is connected to the control unit 66, and the control unit 66 controls driving and stopping of the driving of the DC motor 62.

On the output side of the speed reduction unit 64, a take-up shaft 68 for taking up the negative film F drawn from the cartridge 18 in layers is provided, and the taken negative film F is taken up by the take-up shaft 68. .

A sensor 70 for detecting the presence / absence of the perforation 60 is arranged at a position opposed to the recording head 24 with a negative film F interposed therebetween, and the sensor 70 is connected to the control unit 66. There is. Therefore, the result detected by the sensor 70 is supplied to the control unit 66. In the control unit 66, the DC motor 62 is driven to drive the perforation 60
The drive of the DC motor 62 is stopped when is detected. An offset is set between the position where the sensor 70 is arranged and the actual stop position of the perforation 60 (position S in FIG. 2), and this offset value (dimension 1 in FIG. 2) is sent to the control unit 66 in advance. The stop signal is outputted after the size l has been stored since the sensor 70 detected the perforation 60.

An encoder 72 is connected to the control unit 66, and the encoder 72 is arranged corresponding to the barcode 61. Here, in the control unit 66, the encoder 72 counts the barcode 61 during the overrun from the time when the stop control signal of the DC motor 62 is output to the time when the negative film F is stopped, and the recording header 24 causes the bar code 61 to be counted when the next conveyance starts. This count number is recorded on any track of the magnetic recording layer 54 (see FIG. 2).

The negative film F whose shooting has been completed is again placed in the patrone 18
After being rewound, it is taken out of the camera 10 and placed at a predetermined position of the photoprinting apparatus 12.

In the photoprinting device 12, a negative carrier 26 is arranged on the optical axis of a light source 25 that is irradiated during printing. Negative carrier 26
Is provided with a drive roller (not shown) that is rotated by the drive force of the drive unit 30 connected to the control device 28.
The negative film F is transported in the direction of arrow A in FIG. The drive unit 30 is composed of a pulse motor. Further, the negative carrier 26 is provided with a solenoid 32, and the negative film F is supplied with a signal from the control device 28.
Can be sandwiched and crimped at the baking position.

Each CMY filter 3 is located between the light source 25 and the negative carrier 26.
4 are interposed, and are projected and retracted on the optical axis according to the exposure amount of each color.

The light beam transmitted through the negative film F is applied to a photographic paper 38 via a lens 36, and an image is printed on the photographic paper 38. A shutter 40 is interposed between the photographic printing paper 38 and the lens 36, and is retracted onto the optical axis at the time of exposure by a signal from the control device 28.

Negative carriers on the transport path of the negative film F
A reading head 42 is provided on the upstream side of 26 to read information recorded by the recording head 24 of the camera 10. This information includes the number of bar codes counted when the negative film F is overrun. Further, an erasing / recording head 44 is arranged downstream of the negative carrier 26 on the transport path. The erasing / recording head 44 has a function of erasing the information on the track and recording it on the same or another track according to the signal from the control device 28, and can record the information at the time of the burning process. .

In the memory of the control device 28, the interval dimension of the bar code 61 attached to the negative film F is stored in advance. By multiplying the count number of the bar code 61, the camera
The amount of overrun at 10 can be calculated.

The operation of this embodiment will be described below with reference to the flow charts of FIGS. 6 and 7. First, referring to FIG. 6, the camera
The transport control in 10 will be described.

After loading the negative film F into the camera 10 at step 200, the loading is performed. Next, at step 202, it is judged whether or not the perforation 60 is detected. At the time when it is detected, the process proceeds to step 204 to carry the sheet by the size l, and a stop signal is output (step 206). Here, the motor mounted on the camera 10 is the DC motor 62, and the inertia is largely overrun. For this reason, in the next step 208, the encoder 72 counts the bar code 61 of the negative film F which moves after the stop signal is output. In this way, the overrun amount of the negative film F is obtained.

In step 210, it is determined whether or not a predetermined time has elapsed since the stop signal was output. The predetermined time is set based on the maximum overrun time. Step
When a predetermined time elapses at 210, the process proceeds to step 212 and an image is taken. When the photographing is completed, the process proceeds to step 214, the negative film F is conveyed, and the recording head is conveyed during this conveyance.
The count value of the bar code 61 is recorded on a predetermined track of the magnetic recording layer 54 by 24.

In the next step 216, it is judged whether or not the shooting of all frames is completed. If not completed, the process proceeds to step 202, and if completed, the process proceeds to step 220. In step 220, the conveyance is stopped, the process proceeds to step 222, and the negative film F is rewound onto the spool 16.

Next, according to the flow chart of FIG. 7, the conveyance control when the negative film F which has been photographed and developed and is loaded in the photographic printing apparatus 12 will be described.

When the negative film F is conveyed in step 250, the process proceeds to step 252 and the reading value of the bar code 61 recorded on the predetermined track of the magnetic recording layer 54 is read by the reading head 42. Next, at step 254, the overrun amount is calculated. This is because the space size of the bar code 61 is stored in advance in the memory of the control device 28.
It can be easily calculated by multiplying the interval dimension and the count value.

In step 256, it is judged whether or not the perforation 60 is detected during the conveyance of the negative film F, and if it is detected, the process proceeds to step 258 to convey the calculated overrun amount and then stop ( Step 260). For stop control at this time, since a step motor is applied to the drive unit 30, the stop accuracy is high and the desired position (baking position) is achieved.
Surely stopped.

The image frame positioned at the printing position is transmitted through the image and printed on the photographic paper 38 (step 26).
2) It is determined at step 264 whether or not the printing process of all the image frames has been completed. Here, in the case of a negative determination, the processing proceeds to step 250, and in the case of a positive determination, the processing ends.

As described above, in the present embodiment, the transport control error (overrun amount) in the camera 10 is stored, and the photo printing device 12 corrects the error, so that it is not necessary to manually correct the frame position. The workability is improved, and proper positioning can be performed even when reprinting or reordering using the negative film F.

Further, since the error is recorded in the magnetic recording layer 54, it can be overwritten if unnecessary and the recording area can be effectively used. Furthermore, by applying this magnetic recording layer 54, the device configuration for exchanging information between the camera 10 and the photo printing device 12 is simple, and it is not necessary to use other recording media such as paper tape.

In this embodiment, the conveyance control error between the camera 10 and the photo printing device 12 is corrected, but it can be applied to the positioning error between the verification position of the tester and the printing position of the printing device. That is, when the negative film F photographed by the camera 10 is positioned at the verification position of the verification device after the development processing, it may not be positioned at the proper position due to the error due to the overrun. Here, if the position is manually corrected on the calibrator side and this correction amount is recorded in a predetermined track of the magnetic recording layer 54, no error will occur when positioning at the printing position in the printing device 12. Can be positioned.

Although the overrun amount or the correction amount is obtained by counting the bar code 61 attached to the negative film F, one bit of the recording signal recordable on the magnetic recording layer 54 may be used as a unit. That is, after the stop signal is output, the recording signal is recorded by the recording head 24, and the recording signal is read by the reading head 42 of the photoprinting apparatus 12, thereby enabling highly accurate positioning. In this case, since the magnetic recording signal has a recording density of 254 bits / inch, an error of 0.1 mm unit can be discriminated.

〔The invention's effect〕

As described above, the photographic film transport control method according to the present invention has an excellent effect that the stop positions can be detected and the stopping positions can be made to coincide with each other even if the types of driving means are different.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram for recording information, FIG. 2 is a schematic configuration diagram of a recording head, FIG. 3 is a sectional view of a negative film, and FIG. 4 is a plan view showing an arrangement of tracks of the negative film. FIG. 5 is a plan view of the negative film, and FIGS. 6 and 7 are control flow charts. F ... Negative film, 10 ... Camera, 12 ... Photo printing device, 24 ... Recording head, 28 ... Control device, 42 ... Read head, 54 ... Magnetic recording layer, 60 ... Perforation, 61 …… bar code, 62 …… motor, 66 …… control part, 70 …… sensor, 72 …… encoder.

Claims (5)

(57) [Claims] 1. A photographic film conveyance control method, wherein a perforation is provided for each image frame of a photographic film provided with a magnetic recording layer, and the perforation is detected to stop at a predetermined position. When the image frame is stopped at a predetermined position, overrun information from the detection of the perforation to the stop is recorded in the magnetic recording layer, and the magnetic field is recorded when the same image frame is positioned at another predetermined position. A photographic film transport control method, comprising: controlling the transport amount of the photographic film after detecting the perforation based on the overrun information recorded on the recording layer. 2. The predetermined position is a photographing position of an image by a camera, and the other predetermined position is a verification position or a printing position of the image after the development processing is completed. The photographic film transport control method described. 3. A photographic film conveyance control method for providing a perforation corresponding to each image frame of a photographic film provided with a magnetic recording layer, and detecting the perforation to stop at a predetermined position. After the stop of the image frame, the error from the predetermined position is corrected, the correction amount information is recorded on the magnetic recording layer, and the magnetic recording is performed when the same image frame is positioned at the predetermined position or another predetermined position. A photographic film transport control method comprising controlling the transport amount of the photographic film after detecting the perforation based on the correction amount information recorded in the layer. 4. The photographic film transport control method according to claim 1, wherein the overrun information is a count value of the number of bits of a magnetic recording signal. 5. The photographic film transport control method according to claim 3, wherein the correction amount information is a count value of the number of bits of the magnetic recording signal.