JPH04315144A - Method for recording information on photographic film and camera - Google Patents

Abstract

PURPOSE:To offer a photographic film processing method and a camera by which information is appropriately recorded on a film so that it can be read and where the recording density of the information is increased. CONSTITUTION:A pulse signal outputted from an encoder 28 is inputted in a camera control part 22, and the feeding speed of the film F is controlled to become an appropriate and fixed feeding speed based on the signal by the camera control part 22. At such a time, the tip part of a magnetic head 16 contacts with the magnetic recording layer 40 of the film F in a camera 10, and the information is recorded on the film F by the magnetic head 16 while feeding the film F. Since the information is recorded on the film F while feeding the film F at an appropriate and fixed speed, the information recorded on the film F is recorded without irregularity as the appropriate information. Therefore, the recording density of the information is increased.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a method for recording information on photographic film and a camera, and particularly to a method for recording information on photographic film and a method for recording information on photographic film while winding the photographic film in a device such as a camera. Regarding the camera.

0002

[Prior Art] Conventionally, shooting information (
For example, a method of encoding and optically recording information such as the presence or absence of a strobe, distance to the subject, color temperature of the subject illumination light, date of shooting, and user ID on the base of a negative film, and this method is provided. A new camera has been proposed (
JP-A-62-250744, JP-A-61-246
730 and JP-A-1-246533). Barcodes are mainly used for the above-mentioned optically recorded encoded information. Generally, when recording barcodes on negative film, once one image is captured, the next image is While the film is being conveyed to the frame, that is, while the film is being conveyed, a bar code is printed onto the base by pulsed light emission from a light source such as an LED. As a result, when printing is performed after development, etc., the recorded barcode can be read and the printing can be performed under optimal conditions.

In addition to the method of optically recording on the base of a negative film as described above, it is also possible to coat a photographic film, particularly a negative film, with a transparent magnetic material to record information identifying the negative film and the negative film. It has been proposed to magnetically record information that identifies images printed on (
As an example, International Publi
cation Number WO90/04205
). This magnetic information recording method is similar to the optical information recording method described above, in which the above information is encoded while transporting the film, and an electric signal is applied to the magnetic head based on the encoded information. Information is recorded on film. According to this, information can be stored corresponding to each image frame, and furthermore, in a laboratory, when printing onto photographic paper, it is also possible to record the exposure amount, etc. at the time of printing for each image frame.

However, the outer diameter dimension of the film wound on the winding shaft depends on the operating characteristics (rise characteristics) of the motor connected to the film winding shaft, the power supply voltage characteristics of the power supply supplied to the motor, and the amount of film winding. The transport speed of the film is not constant due to changes in .

In order to solve the above problem, when recording optically, the rotation of the sprocket for transporting the film is detected by an encoder, and the light source is made to blink in synchronization with the rotation. On the other hand, in the case of magnetic recording, the influence of changes in film transport speed is reduced by using redundant recording codes as magnetic recording signals during recording. For example, try using a signal that indicates "0" if there is a falling pulse earlier than 1/2 of the interval between two rising pulses, and "1" if there is a falling pulse later than 1/2. There are bits etc. (
(See FIG. 9(A)).

[0006]

However, in the conventional method of recording information on photographic film, when recording optically, the density of the amount of light irradiated onto the film changes depending on the transport speed of the film. For example, at a given exposure level, if the film transport speed is fast, the density obtained in the bar part of the bar code will be low, and if it is slow, the density obtained in the bar part of the bar code will be high. . Therefore, when reproducing recorded information, if the density is low, it may not be possible to distinguish between barcode bars and blanks, and if the density is high, the bars of the barcode may be blurred due to excessive light density. , it may still be impossible to distinguish between bars and blanks. On the other hand, when magnetically recording information, redundant codes are used, so the amount of information that can be recorded is limited by this redundancy.

[0007] When recording information, a reference signal is recorded separately from the recorded signal, and when information is reproduced, this reference signal and the recorded signal are simultaneously reproduced and the information is read while comparing the recorded signals. Misreading of information due to changes in conveyance speed during recording is reduced, but by providing a reference signal separate from the recording signal, extra information must be recorded, which is not preferable.

[0008] In consideration of the above facts, the present invention has been devised to provide a photographic method that can record information on a film so that it can be properly read, and that can increase the recording density of information. The purpose is to obtain a method for recording information on film and a camera.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the invention as set forth in claim 1 records information on the magnetic layer by magnetism while relatively moving a photographic film having a magnetic layer and a recording head. The method for recording information on photographic film is characterized in that the relative speed between the photographic film and the recording head is controlled to be constant, and information is recorded on the photographic film when the relative speed is constant.

The invention as set forth in claim 2 provides a method for recording information on a photographic film, in which information is optically recorded on the photographic film while relatively moving the photographic film and an irradiation means for irradiating the photographic film with a light beam. It is characterized in that the relative speed between the photographic film and the irradiation means is controlled to be constant, and information is recorded on the photographic film when the relative speed is constant.

The invention described in claim 3 provides a camera equipped with a winding means for winding photographic film one frame at a time, and a detection means for detecting the winding speed of the photographic film at the time of winding, and a detection means for detecting the winding speed of the photographic film at the time of winding, and a detection means for detecting the winding speed of the photographic film at the time of winding. a recording means for recording information related to the photographed image; and a recording means for outputting information related to the photographed image to the recording means, and for winding the photographic film at a constant winding speed based on a detection signal output from the detection means. and a control means for controlling the winding means.

0012

According to the first aspect of the invention, in the method for recording information on a photographic film, information is recorded on the magnetic layer by magnetism while relatively moving the photographic film having a magnetic layer and a recording head. At this time, the relative speed between the photographic film and the recording head is controlled to be constant. For example, when the recording head is fixed and the photographic film moves, the photographic film is conveyed at a constant moving speed. Information is then recorded on the photographic film when the photographic film and the recording head are at a constant relative speed. In this way, by recording information on the magnetic layer when the photographic film and the recording head are at a constant relative speed, the photographic film is able to properly store information without changing its recording density as the speed changes. is recorded. Therefore, when reading recorded information, it is possible to read the information at a constant relative speed without considering changes in the relative speed between the photographic film and the recording head. Information recording density can be increased without using it.

According to the second aspect of the invention, in the method for recording information on a photographic film, information is recorded on the photographic film while relatively moving the photographic film and the irradiation means for irradiating the photographic film with a light beam. At this time, the relative speed between the photographic film and the irradiation means is controlled to be constant. For example, when the irradiation means is fixed and the photographic film moves, the photographic film is conveyed at a constant moving speed. Then, information is recorded on the photographic film when the photographic film and the irradiation means are at a constant relative speed. In this way, by recording information on the photographic film when the photographic film and the irradiation means are at a constant relative speed, the information is uniformly recorded on the photographic film without changing the recording density according to the speed change. is recorded. Therefore, the density of the irradiated area formed on the photographic film by the light beam emitted from the irradiation means is uniform, and there is no underexposure or overexposure of the optically recorded information, so the recorded information will not be misread. Can be read properly.

According to the invention set forth in claim 3, in a camera equipped with a winding means for winding photographic film one frame at a time, there is provided a detection means for detecting the winding speed of the photographic film at the time of winding; a recording means for recording information related to the photographed image, and a photographic film is wound at a constant winding speed based on a detection signal outputted from the detection means while outputting the information relevant to the photographed image to the recording means. and control means for controlling the winding means so that the winding means is rotated. By using a camera configured as described above, the method of recording information on a photographic film according to claim 1 or 2 can be easily realized.

[0015]

Embodiments Hereinafter, embodiments in which the present invention is applied to a camera will be described in detail with reference to the drawings. The first example is
Information is recorded using magnetism.

As shown in FIG. 2, an area 80 is provided on one side of the camera 10 (left side in FIG. 2) into which a cartridge 32 containing a film F wound onto a spool 42, which will be described later, is loaded. . Further, in this region 80, a rewinding motor 26 (see FIG. 1) is arranged such that a rotating shaft (not shown) is connected to the spool 42 of the loaded cartridge 32. The film F, which has been completely photographed, is rewound into the cartridge 32 by the rotation of the motor 26.

A photographing area 84 is located adjacent to the area 80, and is provided with a shutter mechanism (not shown). A release button 54 is disposed on the upper surface of the outside of the camera 10, and when the release button 54 is pressed, a shutter mechanism (not shown) operates. When a shutter (not shown) opens, the light rays from the subject advance in the direction A in FIG. 2 and an image is recorded on the film F.

The other side of the camera 10 (on the right side in FIG. 2) is provided with a region 82 on which the film F is wound, and in this region 82, the sprocket 20 and the winding shaft 44 for winding the film F are arranged in order. It is arranged. camera 10
There is an area 8 inside the back cover 56 when the back cover 56 is closed.
A magnetic head 16 that protrudes into the inside of the magnetic head 2 is provided. The magnetic head 16 is arranged so that its tip comes into contact with the magnetic layer of the film F when the back cover 56 is closed. This magnetic head 16 is connected to a camera control section 22. Note that the camera control section 22 is provided on the back cover 56 of the camera 10. Further, the rotation shaft of the sprocket 20 is connected to the rotation shaft of an encoder 28 that detects the rotation of the sprocket 20. A motor 2 is connected to the winding shaft 44.
4 rotation shafts are connected to each other, and the rotation of the motor 24 is transmitted to the winding shaft 44.

A display 50 and an operation section 52 are provided on the outside of the back cover 56, and the display 50 and operation section 52 are connected to the camera control section 22. The display 50 can display information reproduced from the film, information to be recorded, etc., and the operation section 52 can input information to be recorded.

As shown in FIG. 1, the camera control section 22 includes a control circuit 23 incorporating a CPU (not shown). The control circuit 23 connects the encoder 2 via the amplifier 29.
It is connected to the output terminal of 8. The control circuit 23 also includes a direction in which the film F is wound (B) via a driver 25.
direction). The camera control unit 22 winds up the image frame 34 by one frame when the photographing of one frame is completed.

Further, the camera control section 22 is provided with an analog switch 17. A terminal S1 of the analog switch 17 is connected to the magnetic head 16. On the other hand, the terminal S2 is connected to the control circuit 23 via the recording circuit 18, and the terminal S3 is connected to the control circuit 23 via the reproduction circuit 19. The control end G of this analog switch 17 is
It is connected to the control circuit 23, and when no switching signal is input to the control terminal G, the terminals S1 and S2 are electrically connected. While the switching signal is input to the control terminal G,
The terminals S1 and S3 are switched to be electrically connected. Therefore, during recording, the analog switch 17
and terminal S2 are electrically connected, and the recording circuit 18 excites or demagnetizes the magnetic head 16 in response to a control signal from the control circuit 23. On the other hand, during reproduction, the analog switch 17 conducts the terminals S1 and S3, and the weak signal output from the magnetic head 16 is amplified and waveform-shaped in the reproduction circuit 18, and then output to the control circuit 23. Therefore, it is possible to magnetically record or read information while winding or rewinding the film F. Note that the control circuit 23 includes a memory (not shown) that stores read information or recorded information. The control circuit 23 also stores a control program for controlling winding or rewinding of the film F.

Next, the film F used in this example will be explained with reference to FIGS. 3 and 4. This film F is
As shown in FIG. 4, an emulsion layer 38 is formed on the upper surface of the transparent base 36.
is provided so that images can be recorded by exposure. A magnetic recording layer 40 is provided on the lower surface of the transparent base 36 in FIG. 4, in which a transparent magnetic material is coated over the entire surface of the film F for magnetic recording and reproduction. In this magnetic recording layer 40, the optical transmission density is reduced by reducing the filling rate of magnetic particles included in the magnetic layer. Therefore, the influence of the amount of light transmitted through the film F of the magnetic recording layer 40 is small and does not interfere with the photographed image during photographing or printing processing.

The magnetic information recording section used in this embodiment uses an area (information recording section) at a position where one of the perforations P of the film F is omitted. At the position where this perforation existed, information related to the photographed image is encoded and magnetically recorded in corresponding tracks (FIG. 3) of tracks S1, S2, T1, and T2 (described later) by the camera 10. This information recording section
By providing it outside the range of the image frame, even if the film F is scratched due to the sliding of the magnetic head, it will not interfere with the photographed image.

A perforation P is provided on the film F at an end in the width direction of the film F opposite to the side on which information is recorded corresponding to each image frame. This perforation P corresponds to the information recording start position. Further, a plurality of perforations P are provided at the leading end of the film F to allow the film F to be pulled out by hooking onto the claws of a sprocket (not shown).

It should be noted that the magnetic recording layer 40 is coated only on the corresponding magnetic recording area without coating the entire surface of the film F with a magnetic material, for example, outside the range of the image frame 34 of the film F.
It may be formed by applying along the longitudinal direction of the film F. Further, the information is not limited to the position where information is recorded on the film. For example, perforations may be eliminated between film image frames and an information recording portion may be provided in this portion, and information may be recorded on this information recording portion, or a conventional film F having perforations may be used.

As shown in FIG. 3, the information recording section used in this embodiment records the image frame 34, which is the leading edge of the film F.
It is composed of tracks S1 and S2 where no image is recorded, and tracks T1 and T2 corresponding to each image frame 34. As described above, one perforation P is provided at the leading end of the tracks S1 and S2 and at the leading end of each of the tracks T1 and T2, each corresponding to the image frame 34. Tracks S1 and S2 are film F
Tracks T1 and T2 are areas in which necessary information is recorded for each image frame 34. To input information to each track, for example, as shown in FIG. 5, 1-bit binary data,
That is, it is 1-byte predetermined code information expressed by a combination of "1" or "0", and corresponding codes are determined based on a predetermined table.

A clock signal is recorded at the leading and trailing ends of the track S1, and is used as a speed value for the transporting state of the film F, particularly the transporting speed during recording during playback. In the track S2, an input area for inputting data in the laboratory is set. A camera input area and the like are set in the track T1. A lab input area, a user input area, and the like are set in the track T2. Various pieces of information are coded and recorded in each of the above areas. For example, as shown in FIG. 6, the track T1 has a total length of 36 mm, which is the same as the longitudinal dimension of the image frame 34, and a length of 3 mm at the tip and end.
are designated as clock areas 72 and 74 in which clock signals are recorded. Next to the clock region, the STX region 76,
Camera input areas 78, 80, ETX area 82 and ECC
A region 84 is set and is continuous with the terminal clock region 74. In this way, compatibility between devices can be achieved by setting the format of magnetic information recorded and reproduced in each area.

The contents of the recorded information include, for example, identification information used in the laboratory, such as a user ID for identifying the user and a distributor ID for identifying the distributor from whom the user has requested development. This information is used in the laboratory for process control. Information for obtaining a print of an image size desired by the user includes pseudo zoom information, trimming information, etc., and this information is used to control the movement of the zoom lens of the printing device.

Next, the control program stored in the control circuit 23 will be explained with reference to FIGS. 10 and 11.

The photographer loads the cartridge 32 into the camera 10 at a predetermined position, and removes the film F from the cartridge 32.
Pull out the tip and wrap it around the winding shaft 44 via the sprocket 20. When the back cover 56 is closed, the film F is conveyed to the photographed image frame and becomes ready for photographing.

When the photographing is possible, the control routine shown in FIG. 10 is activated and the process proceeds to step 102. In step 102, the predetermined time To and increase/decrease value α, which are initial values of this control routine, are taken in, and the process proceeds to step 104. Note that the predetermined time To is the period of the signal output from the encoder 28 when the film F is transported at the optimal transport speed. In step 104, it is determined whether the shooting of one frame of image has been completed by determining whether the release button has been turned off after being turned on. When the photographing is completed, the process advances to step 106 and transport of the film F is started. When conveyance of the film F is started, the process proceeds to step 108. In step 108, the period T obtained from the signal output from the encoder 28 in accordance with the transport speed of the film F in an interrupt processing routine to be described later is read from the register, and it is determined whether T=To. In case T<To or T>To,
Step 108 is repeated until T=To. If T=To, proceed to step 110;
Start recording information. In step 112, it is determined whether one frame has been conveyed, and if the conveyance for one frame has not been completed, information is continued to be recorded in step 110.
Information is recorded until recording of one frame is completed. When the recording of information for one frame is completed, the process proceeds to step 114, and transport of the film F is stopped. As a result, when the photographing of one frame is completed, the image frame 34 is wound up by one frame, and the film F is conveyed in the B direction, whereby the next unphotographed image frame is conveyed to the photographing area 84. Further, as the film F is conveyed, information for one frame is recorded. In step 116, it is determined whether all the frames in film F have been fed. If not all have been sent yet, the process returns to step 104. If all frames have been sent,
Proceeding to step 118, the film F is rewound so that the photographed film F is stored in the cartridge 32. After the film F is rewound into the cartridge 32 again, it is taken out from the camera 10 and transported to the laboratory.

Next, the interrupt processing routine that is interrupted by the rising edge of the output signal of the encoder 28 is shown in FIG.
This will be explained with reference to 1.

When the output signal of the encoder 28 rises, the routine shown in FIG. 11 is executed. In step 120,
Current time Ti when the output signal of the encoder 28 rises
is read and stored in a register (not shown). In step 122, the current time Ti and the previous time Ti-1 at which the output signal of the encoder 28 rose are read. Then, calculate T=Ti-Ti-1. As a result, the period T of the signal output from the encoder 28 corresponding to the transport speed of the film F is determined. Note that the period T is stored in a register (not shown). When the calculation is completed, the process proceeds to step 124. In step 124, the determined period T
and a predetermined time To, it is determined whether T=To. In the case of T=To, the conveyance speed of the film F is at an appropriate speed, so the interrupt processing is ended while the motor drive is maintained without changing the set motor drive current, and the process returns to the control routine. return.

In step 124, if T<To or T>To, the process proceeds to step 126. In step 126, the time T and the predetermined time To are T>To
Determine whether or not. In the case of T>To, it is determined that the transport speed of film F is slower than the appropriate speed,
Proceed to step 128. In step 128, a value obtained by adding a predetermined value α to the current current value I is set to be supplied to the motor, thereby increasing the transport speed of the film F. If T<To, it is determined that the transport speed of film F is faster than the appropriate speed, and step 13
Go to 0. In step 130, a value obtained by subtracting a predetermined value α from the current current value I is set to be supplied to the motor, thereby slowing down the transport speed of the film F. After the motor drive current is set, the interrupt processing is terminated and the process returns to the control routine. In this way, the motor 24 is controlled so that the transport speed of the film F is slow when it is faster than the proper speed, and is fast when it is slower than the proper speed. Therefore, the transport speed of the film F is controlled to be an appropriate speed.

The operation of the first embodiment will be explained below. A cartridge 32 is loaded into the camera 10 at a predetermined position. When the operator presses the release button 54 and recording of the image on the film F is completed, the camera control section 22 controls the driver 25 to rotate the motor 24. As a result, the film F is conveyed to the next unphotographed image frame. At this time, the pulse signal output from the encoder 28 is input to the camera control section 22, and the camera control section 22 receives the pulse signal output from the encoder 28.
2 controls the transport speed of the film F based on this signal. When the transport speed of the film F reaches a predetermined speed, the magnetic head 16 records information on the film F. Since the control circuit 23 always controls the rotation speed of the motor 24 so that the transport speed of the film F is constant,
Film F is transported at a constant speed. Therefore, magnetic information is recorded on the film F at a constant pitch without uneven recording of information.

When the film F is taken out from the camera 10, it is conveyed to a developing processing device (not shown), where it is subjected to developing processing and the like. After the development processing, etc. have been completed, the film is transported to a photo printing device, where the information recorded on the film F is read properly without misreading, and based on the read information, printing conditions such as exposure amount are set. Each image frame 34 is sequentially positioned to a printing position, and optimal printing processing is performed. Developed film F and prints processed after printing are
The item is returned to the agent corresponding to the agent ID, and the agent returns it to the user based on the user ID.

As explained above, in the camera 10, magnetic information is recorded on the film F while being conveyed at a predetermined speed, so that the recording density can be adjusted without using redundant codes for the recorded information. It is possible to record high information, and when reproducing the recorded magnetic information,
Necessary information can be read in the magnetic reading section without reading errors due to uneven recording of information.

Now, to explain the information code at the time of recording, in the redundant information code, as shown in FIG. 9(A), a signal corresponding to a 1-bit binary code is
When the binary code is "0", the polarity is not inverted, but when it is "1", the polarity is inverted, and this binary code is "1".
A signal with the same polarity added to the beginning of a "0" signal is used. Therefore, three clocks are required to represent a 1-bit binary code. On the other hand, in the frequency modulation method, two clocks are sufficient to represent a 1-bit binary code, as shown in FIG. 9(B). In this way, the density of information recorded on the film F can be increased by using the information code based on the frequency modulation method. In this embodiment, since the transport speed of the film F is controlled to be constant, magnetic information is recorded on the film F without uneven recording of information. Furthermore, by using an information code such as a frequency modulation method, information can be recorded with high recording density.

In the first embodiment described above, an example was explained in which information was recorded magnetically in the camera 10 while the film F was being conveyed, but as a second embodiment, an example in which information was recorded optically on the film F was explained. , will be explained with reference to FIG. Since the second embodiment has substantially the same structure as the first embodiment, the same parts are denoted by the same reference numerals and detailed explanation will be omitted.

In the vicinity of the photographing area 84 (FIG. 2) of the camera 10, an LED 12 as a light source for irradiating a light beam for recording the barcode B is disposed on the back cover 56.
The film F is placed at a position where the light beam emitted from the film F can be irradiated with the light beam emitted from the film F. As a result, while transporting film F, L
A barcode B is recorded on the film F by emitting a light beam from the ED 12.

As shown in FIG. 7, the LED 12 is connected to a control circuit 23 via a driver 25, and the driver 25 controls the LED 12 according to a control signal from the control circuit 23.
lights up. This lighting of the LED 12 is carried out while the film F is being conveyed, so the film F has no LEDs.
A barcode consisting of bars having a length corresponding to the lighting time of D12 is formed. Note that the transport speed of the film F is controlled to a predetermined speed similarly to the first embodiment.

Next, as the optical information recording area used in the second embodiment, the area (information recording section) at the position where one of the perforations P of the film F is omitted is used, as in the first embodiment. However, in this information recording section, information such as information indicating whether a strobe is used, information indicating the photographing light amount value (LV value), and information at the time of photographing indicating the date and time of the photograph are encoded and stored in the barcode B. It is printed onto film F as follows.

Barcode B is code information in which a plurality of pieces of information, characters, etc. are encoded. This barcode B
is recorded in the information recording section of the film F as information regarding each image frame, so the information recording area of each image frame is recorded within the length of one image frame (36 mm).

The operation of the second embodiment will be explained below. A cartridge 32 is loaded into the camera 10 at a predetermined position. When the operator presses the release button 54 and the recording of the image on the image frame is completed, the camera control unit 22 controls the driver 25 to rotate the motor 24, and the film F is transported to the next unphotographed image frame. . At this time,
A pulse signal output from the encoder 28 is input to the camera control section 22, and the camera control section 22 controls the transport speed of the film F based on this signal. Film F
When the transport speed reaches a predetermined speed, the LED 12 starts lighting up in response to a control signal, and information is recorded. A signal output from the control circuit 23 is input to the driver 14,
The driver 14 lights up the LED 12 in response to this signal. By lighting the LED 12 in accordance with the transport speed of the film F, a bar portion of a bar code having a length corresponding to the lighting time of the LED 12 is formed on the film F. In addition, since the rotational speed of the motor 24 is controlled so that the transport speed of the film F becomes a predetermined speed by detecting the pulse output from the encoder 28, the film F is transported at a constant speed, and the film F A barcode of the appropriate length is recorded.

In this way, since the information stored in the control circuit 23 is recorded as optical information (barcode) while transporting the film F at a predetermined transport speed, the recorded optical information is recorded at a constant pitch. Recorded evenly on film F. Therefore, the bar portion of the recorded barcode is uniformly recorded without the recording width and recording light intensity changing depending on the transport speed of the film F. Therefore, since the transport speed of the film F is fast, the bar portion will not be underexposed, and because the transport speed of the film F is slow, the recording density will increase and the bar portion will not be overexposed.

When the film F is taken out from the camera 10, it is conveyed to a developing processing device (not shown), where it is subjected to developing processing and the like. After the development processing, etc. have been completed, the film is transported to a photo printing device, where the information recorded on the film F is read properly without misreading, and based on the read information, printing conditions such as exposure amount are set. Each image frame 34 is sequentially positioned to a printing position, and optimal printing processing is performed. Developed film F and prints processed after printing are
The item is returned to the agent corresponding to the agent ID, and the agent returns it to the user based on the user ID.

As explained above, in the camera 10, information is recorded on the film F at a predetermined speed.
The length of the recorded barcode becomes uniform, and when reproducing the recorded optical information (barcode), the optical information reading section can read the necessary information without reading errors.

[0048] In the above second embodiment, an example was explained in which a bar code was used as the optical information to be recorded.
The present invention is not limited to barcodes; other codes, marks, etc. may be used, and combinations thereof may also be used.

In the first and second embodiments described above, the transport speed of the film F is determined from the signal output from the encoder, and information is recorded when the speed is a predetermined speed. Another embodiment in which this detection signal is used to detect whether or not the drive power source for transporting the film F is low will be described. Assuming that the predetermined transport speed is speed V1, if the drive power supply is not low and sufficient power can be supplied, the signal output from the encoder is detected as shown in FIG. 8(A). The time it takes for the transport speed of the obtained film F to reach the speed V1 is time t1. On the other hand, when the drive power source decreases, the transport speed of the film F is reduced to the speed V at time t1 as shown in FIG. 8(B).
It is x. It takes time tx to reach the speed V1. Therefore, for example, by determining whether the transport speed V of the film F during the predetermined time T1 satisfies V<V1, it can be easily determined whether the power supply is decreasing. Further, it can also be determined from the slope of the rising signal using this differential signal. Further, by using this signal, it is possible to easily detect the terminal end of the film F and detect a transport failure of the film F.

Furthermore, since the information is recorded when the transport speed of the film F is constant, it is difficult to check whether the recorded information is properly recorded when the film F is transported, such as when rewinding the film F. can be easily confirmed.

In the above embodiment, a case has been described in which the conveyance speed of the film F is detected by connecting an encoder to a sprocket, but the present invention is not limited to this position and encoder.

Furthermore, in the above embodiment, a case was explained in which information was recorded while the film F was being conveyed at a constant conveyance speed, but the present invention is not limited to this, and it is possible to Alternatively, the light beam irradiated onto the film F may be moved (scanned).

[0053]

As described above, according to the present invention, since information is recorded when the film is conveyed at a proper and constant conveyance speed, the information recorded on the film is recorded evenly. Therefore, when recording information magnetically, information with a high recording density can be recorded, and when recording optically, the portion irradiated with light of the recorded optical information is Since the recording width and the recording light amount density do not change depending on the information and are recorded uniformly, information can be read out without making reading errors.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the configuration of a camera device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the configuration of a camera according to an embodiment of the present invention.

FIG. 3 is a plan view showing a film and the arrangement of each track in a magnetic recording area of the film.

FIG. 4 is a sectional view taken along line II-II in FIG. 3;

FIG. 5 is a schematic diagram showing the contents in each track of the magnetic recording area.

FIG. 6 is a plan view showing the contents of track T1 in the magnetic recording area.

FIG. 7 is a perspective view showing the configuration of a camera device according to a second embodiment of the present invention.

FIG. 8 is a diagram showing the transport speed and time of film F in the camera device.

[Fig. 9] Fig. 9(A) is a diagram showing time (clock) and binary codes corresponding to information in a code system with redundancy, and Fig. 9(B) is a diagram showing time (clock) and binary codes corresponding to information in a code system with redundancy. FIG. 3 is a diagram showing binary codes corresponding to information.

FIG. 10 is a flowchart showing a control routine for controlling the transport of film F in the camera of this embodiment.

FIG. 11 is a flowchart showing an interrupt processing routine of the control routine shown in FIG. 10;

[Explanation of symbols]

F Film P Perforation B Barcode 10 Camera 12 LED 16 Magnetic head 22 Control section 23 Control circuit 24 Motor 28 Encoder 40 Magnetic recording layer

Claims (3)

[Claims] 1. A method for recording information on a photographic film in which information is recorded on the magnetic layer by magnetism while a photographic film having a magnetic layer and a recording head are moved relative to each other, wherein the relative speed between the photographic film and the recording head is A method for recording information on photographic film, characterized in that information is recorded on photographic film at a constant relative speed by controlling the speed to be constant. 2. A method for recording information on a photographic film in which information is optically recorded on the photographic film while relatively moving the photographic film and an irradiation means for irradiating a light beam onto the photographic film, wherein the photographic film and the irradiation means are 1. A method for recording information on a photographic film, characterized in that the relative speed of the film is controlled to be constant, and the information is recorded on the photographic film when the relative speed is constant. 3. A camera equipped with a winding means for winding photographic film one frame at a time, comprising a detection means for detecting the winding speed of the photographic film at the time of winding, and recording information related to a photographed image on the photographic film at the time of winding. a recording means for outputting information related to a photographed image to the recording means, and controlling the winding means so that the photographic film is wound at a constant winding speed based on a detection signal output from the detection means. A camera comprising a control means.