JPH04205706A - Magnetic information reader - Google Patents

Abstract

PURPOSE:To improve the reading accuracy of magnetic information by relatively moving a magnetic head and a photographic film having a magnetic recording layer, reading out a signal and adjusting the deviation of the width direction of the film or the deviation of an azimuth angle. CONSTITUTION:The magnetic head 20 and a negative film 104 are relatively moved by a pulse motor so that the width direction of the film 104 is scanned by the head 20 and the read signal and the number of pulses are stored. Next, the peak value of the stored signal is read out and the number of pulses corresponding to it is read out. Then, the position of the head 20 is decided at a position corresponding to the number of pulses. Next, the head 20 is rotated by plus-minus prescribed angle and the film 104 is carried. Besides, the signal and the number of pulses are read and stored. Then, the peak value of the signal and the number of pulses are read out. Besides, the head 20 is rotated to the position corresponding to the number of pulses and positioned. Thus, the deviation of the width direction of the film or the azimuth angle are adjusted and the reading accuracy of the magnetic information is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used in a magnetic information reading device that conveys a photographic film provided with a magnetic recording layer and reads magnetic information recorded on the magnetic recording layer. The present invention relates to a magnetic information reading device for adjusting the azimuth angle between the head of the magnetic information reading device and a magnetic recording layer.

[Prior Art and Problems to be Solved by the Invention] Various information such as conditions at the time of photographing, desired print information, ID of the photographer, etc. are magnetically recorded by a camera on a negative film provided with a magnetic recording layer. However, when magnetically recording information within a camera, the track position may shift in the width direction of the negative film depending on the loading condition of the negative film, the tolerance between the sprocket and the perforations, and the like. Also,
When this recorded information is read by a magnetic head installed in laboratory equipment, etc., the azimuth angle between the magnetic head and the track may deviate from the azimuth angle between the magnetic head and the track when magnetic information is written. There is.

For this reason, written magnetic information cannot be read reliably,
This may result in misreading or poor reading.

In consideration of the above facts, the present invention aims to provide a magnetic information reading device that can read magnetic information with high accuracy by adjusting the deviation in the width direction of the photographic film and the deviation in the azimuth angle of the magnetic recording layer.

[Means to solve the problem]

The invention according to claim (1) is a magnetic information reading device that uses a magnetic head to read magnetic information recorded on a magnetic recording layer provided on a photographic film, wherein the magnetic head is attached to a track of the magnetic recording layer. a moving means for relatively moving the magnetic head and the photographic film so as to move in a direction perpendicular to the direction along the track; a first position for scanning the magnetic head along the longitudinal direction of the track of the magnetic recording layer; a switching means for selectively switching to a second position for scanning in a direction perpendicular to the track; and a direction in which the magnetic head moves along and perpendicular to the track when the magnetic head is switched to the second position. a first signal reading means for detecting a read signal when the photographic film and the magnetic head are scanned while moving relative to each other so as to move the photographic film and the magnetic head;
and first positioning means for positioning the magnetic head at a movement position corresponding to the peak value of the read signal.

The invention according to claim (2) is a magnetic information reading device for reading magnetic information recorded on a magnetic recording layer provided on a photographic film using a magnetic head, the magnetic head being moved in a direction perpendicular to the film surface. a second signal reading means for detecting a read signal when the magnetic head is rotated about the shaft while conveying the photographic film; and a peak value of the read signal. a second position for positioning the magnetic head at a rotation angle corresponding to
and positioning means.

The invention according to claim (3) is a magnetic information reading device that transports a photographic film provided with a magnetic recording layer and reads magnetic information recorded on the magnetic recording layer, the magnetic head being connected to the photographic film. widthwise moving means for moving the film in the width direction; rotational drive means for rotating the magnetic head about a direction perpendicular to the film surface; and rotating the magnetic head in the width direction of the photographic film while conveying the photographic film. The first detects the read signal when moving and scanning.
a signal reading means; a first positioning means for positioning the magnetic head at a movement position corresponding to a peak value of the read signal; and while transporting the photographic film at the position determined by the first positioning means. a second signal reading means for detecting a read signal when the magnetic head is rotated about the axis; and a second positioning means for positioning the magnetic head at a rotation angle corresponding to a peak value of the read signal. It has .

[Effect]

According to the invention set forth in claim (1), with the magnetic head switched to the second position by the switching means, the width direction moving means is operated while transporting the photographic film to move the magnetic head to the second position. Move and scan in the width direction. The read signal during this scanning is read by the first signal reading means, and, for example, the read signal is stored in correspondence with the moving position of the magnetic head. The first positioning means moves the magnetic head in the width direction of the photographic film and positions it at an appropriate position based on the movement position corresponding to the stored peak value of the input signal. This allows the positions of the magnetic head and the magnetic recording layer in the width direction of the photographic film to match the positions at the time of writing.

According to the invention described in claim (2), the rotation drive means is operated to rotate the magnetic head while conveying the photographic film. The read signal during this rotation is read by the second signal reading means, and, for example, the read signal is stored in correspondence with the rotation angle of the magnetic head. The second positioning means rotates the magnetic head and positions it at an appropriate position based on the rotation angle corresponding to the peak value of the stored human power signal. This allows the azimuth angle between the magnetic head and the magnetic recording layer to match the azimuth angle during writing.

According to the invention set forth in claim (3), the above claim (1)
By combining and claim (2), the deviation in the width direction between the magnetic head and the track, the azimuth angle between the magnetic head and the track when writing magnetic information, and the azimuth angle between the magnetic head and the track when reading magnetic information. It is possible to correct the deviation and adjust the position to an appropriate position.

It should be noted that the rotational drive means according to claim (2) can also serve as the switching means according to claim (1).

In this way, since the magnetic head for reading magnetic information can be aligned with the relative position with the magnetic recording layer during writing, erroneous reading of signals and reading errors can be prevented.

〔Example〕

FIG. 1 is a schematic diagram of a photographic printing apparatus 100 in which a negative conveying apparatus according to the present invention is used. Exposure stage 10
The light source unit 106 is connected to the negative film 104 placed in the
Uniform light is emitted from the lens system 108, and the lens system 108 is configured to form an image of the negative film 104 onto the photographic paper 110. Photographic paper 110 is wound up into a roll and stored in a magazine 112, and its leading end is pulled out.
They are sequentially positioned to the burning position. After printing, the photographic paper 110 is conveyed to the processor section 116 via the stock section 114, where it is subjected to various processes such as development, fixing, and washing. A drying section 118 is located downstream of the processor section 116.
is provided, and the photographic paper 110 is dried in this drying section 118.
It is dried by passing through.

In order to convey the Henega film 104 to the exposure stage 102, a negative conveying device 10 is used, as shown in FIGS. 2 and 3. The negative transport device 10 has a function of transporting the negative film frame by frame to the exposure stage.

As shown in FIG. 2, the negative transport device 10 is provided with an insertion port 12 and a discharge port 13 as transport gates. The negative film 104 is conveyed from the insertion port 12 to the discharge port 13 along a predetermined conveyance path. A film processing section 14 is disposed in the middle of the transport path, and uniform light is irradiated from a light source section 106 shown in FIG. 1 onto the image surface of the negative film 104 placed in the opening 14A. It looks like this.

On the downstream side of the insertion port 12, a conveyance roller 31A is arranged. This conveyance roller 31A includes a nip roller 31
B are opposed to each other so that the negative film 104 can be held therebetween. The conveyance roller 31A is rotationally driven by a motor M1.

Conveyance rollers 34A and 35A are disposed at both ends of the opening 14A in the negative film conveyance direction. These conveyance rollers 34A and 35A each include a nip roller 3.
4B and 35B face each other so that the negative film 104 can be held therebetween. Conveyance roller 3
4A and 35A are rotated synchronously by motor M1.

A conveyance roller 36A is arranged near the discharge port 13. Nip rollers 36B are opposed to these transport rollers 36A, and are capable of nipping the negative film 104. Conveyance roller 36A
are rotated synchronously by motor M1.

As the motor M1, a pulse motor or a motor equipped with an encoder is used, the feed amount of which can be easily controlled.

Here, the motor M1 is connected to a controller 62 via a driver 60, and is controlled by the controller 62, respectively.

A magnetic head 20 is located between the conveyance rollers 31A and 34A.
is provided and connected to the controller 62 via a reading circuit 64. For this reason, this magnetic head 20 has a function of reading magnetic information recorded on the negative film 104 being conveyed on the conveyance path. A magnetic head 21 is disposed between the transport rollers 34A and 36A, and is connected to a controller 62 via a write circuit 66. Therefore, the magnetic head 21 has a function of writing information onto the negative film 104 that is transported on the transport path.

A negative film detection section 40 is disposed near the downstream side of the conveyance roller 31A. This negative film detection section 40 is connected to a controller 62 via an amplifier circuit 72. The negative film detection section 40 is composed of a light projecting section and a light receiving section with a transport path in between. The detection unit 40 can optically pick up various information from the negative film 104, and detects the presence or absence of the film, as well as the leading edge of the film, the trailing edge of the film, the splice area, and the screen frame. It has functions such as detection, perforation detection, DX code, command number reading, etc.

A keyboard 74 and a display 76 are connected to the controller 62 . In addition, the controller 62 includes
A memory 78 as first and second storage means is built-in.

As shown in FIG. 3, the magnetic head 20 is attached to a rotating shaft 44 of a pulse motor 42 serving as rotational driving means (also serving as switching means). The axis of this rotating shaft 44 is
It is parallel to the direction perpendicular to the plane containing the negative film 104 surface.

Therefore, when the pulse smoke 42 rotates, the magnetic head 20 rotates and can change the azimuth angle with respect to the tracks of the magnetic recording layer on the negative film 104. As shown in FIG. 4, this magnetic head 2o is controlled by a controller 62 so that the longitudinal direction of the magnetic recording layer is zero.
It is designed to be rotated within a range of ±45°. In this embodiment, it is rotated 90 degrees from the minus 45 degree position (solid line position in Figure 4) (imaginary line position in Figure 4).
It looks like this.

Here, the rotation angle of the magnetic head 20 (the number of pulses of the pulse motor 42) and the input signal value when the negative film 104 is conveyed and the magnetic head 20 is rotating are input to the controller 62. and stored in the memory 78.

Therefore, the controller 62 can obtain the rotation angle at the time of the peak signal from the data stored in the memory 78.

The pulse motor 42 is fixed to an endless timing belt 48 via a bracket 46.

The timing belt 48 is wound around a pair of pulleys 50 and 52. The pulleys 50 and 52 are respectively placed near both ends of the negative film 104 in the width direction.

A rotating shaft of one pulley 50 is coaxially connected to a rotating shaft 56 of a pulse motor 54 serving as a widthwise moving means. The pulse motor 54 is fixed by a bracket 58. Therefore, when the pulse motor 54 rotates,
As the timing belt 48 moves, the pulse smoke 42 and the magnetic head 20 can be moved along the width direction of the negative film 104.

Here, the rotation shaft 44 of the pulse smoke 42 passes through a long hole 82 formed in the guide rail 80. The guide rail 80 extends along the width direction of the negative film 104, and both ends of the guide rail 80 in the extending direction are bent downward at a substantially right angle in FIG.
Fixed. The elongated hole 82 of the guide rail 80 has the role of guiding the movement of the rotating shaft 44 perpendicularly to the conveying direction of the negative film 104.

When the pulse motor 54 rotates, that is, when the magnetic head 20 moves in the width direction of the negative film 104, the magnetic head 2
The azimuth angle for the magnetic recording layer of 0 is the pulse motor 4.
2 is rotated to approximately 90 degrees.

Here, the negative film 104 is conveyed to the controller 62, and the negative film 104 of the magnetic head 20 is
The moving position of the magnetic head 20 (the number of pulses of the pulse motor 54) while moving in the width direction of the magnetic head 20 and the input signal value are inputted in correspondence and stored in the memory 78.

Therefore, the controller 62 can obtain the movement position at the time of the peak signal from the data stored in the memory 78.

The operation of this embodiment will be explained below.

The leading edge of the film set in the insertion slot 12 is transferred to the transport roller 3.
It is held between the 1A1 nip rollers 31B and conveyance is started. By the way, reading by this magnetic head 20 is performed when the magnetic information is at an appropriate position with respect to the track at the time of writing.
It is also necessary that the azimuth angle coincides with the azimuth angle at the time of writing, and in this embodiment, this adjustment is performed after loading the negative film 104. Below, according to the flowchart in Figure 5,
Adjustment control of the track position and azimuth angle will be explained.

First, in step 300, the pulse motor 42 is driven and rotated so as to scan the magnetic head 20 in the width direction of the negative film 104. In the next step 302,
Conveyance of the negative film 104 is started, and then in step 304 the pulse motor 54 is driven to move the magnetic head 20.
is moved in the width direction of the negative film 104. This amount of movement may be slightly larger than one trunk, and the amount of movement per time on one track is about 3 mm.

In the next step 306, the signal is read by the magnetic head 20, and in step 308, the number of pulses of the pulse motor 54 at the time of this reading is read, and in step 310, these are stored in correspondence. In step 312, it is determined whether or not the negative film I04 has been conveyed by a predetermined amount, for example, one frame.If the determination is negative, step 30
Go to step 6 and repeat the above steps. Also, step 31
If an affirmative determination is made in G2, the process proceeds to step 314, where the conveyance of the negative film 104 is stopped, and the process proceeds to step 316.
Move to.

In step 316, the peak value of the stored and α-adjusted signal is read out. This peak value is the optimal position where the magnetic head 2° is not displaced in the longitudinal direction of the magnetic recording layer, and the number of pulses corresponding to this peak value is read out (step 318).
.

In the next step 320, the pulse motor 54 is rotated to position the magnetic head 2o at a position corresponding to the number of pulses read out in the step 318.
Move to 2. As described above, the position of the magnetic head 20 in the width direction with respect to the magnetic recording layer can be set to an appropriate position.

Next, in step 322, the pulse motor 42 is driven to rotate the magnetic head 2o to a position of minus 45 degrees (see the solid line position in FIG. 4). In the next step 324,
Conveyance of the negative film 104 is started, and then in step 326 the pulse motor 42 is driven to move the magnetic head 2o.
Rotate it in the plus 45° direction (see the imaginary line position in Figure 4).

In the next step 328, the signal is read by the magnetic head 20, and in step 330, the number of pulses of the pulse smoke 42 at the time of reading is read, and in step 332, these are stored in correspondence. In step 334, it is determined whether the magnetic head 20 has rotated 90';
If the determination is negative, the process moves to step 328 and the above steps are repeated. Further, if an affirmative determination is made in step 334, the process moves to step 336, and the negative film 104 is
The conveyance of the image data is stopped, and the process moves to step 338.

In step 338, the stored peak value of the signal is read. This peak value is the optimal position where the magnetic head 20 matches the azimuth angle when writing to the magnetic recording layer, and the number of pulses corresponding to this peak value is read out (step 3).
40).

In the next step 342, the pulse smoke 42 is rotated to rotate and position the magnetic head 20 at a position corresponding to the number of pulses read out in step 318, and the process ends. As described above, the azimuth angle when reading magnetic information by the magnetic head 20 can be made to match the azimuth angle when writing magnetic information.

When the adjustment control described above is completed, the following normal printing process is performed.

When the negative film detection unit 40 detects the presence or absence of a film and the leading edge of the film, the magnetic head 20 starts monitoring. The tip passes through the magnetic head 20 at a constant speed, and magnetic information is stably read one after another. The magnetic information signal reproduced by the magnetic head 20 is taken into the controller 62.

When the first screen reaches the exposure and printing position, the conveyance of the negative film 104 is stopped, and the operator inspects the screen.
Determine the exposure correction conditions. At this time, display 7
6 displays conditions such as photographing conditions and film type read as magnetic information, and the operator uses these conditions as a reference for verification. Correction conditions are input from the keyboard 74.

Based on this correction condition, exposure processing is performed, and when the exposure printing of the first screen is completed, the second screen, the third screen, etc.
・is similarly transported intermittently and exposed and printed.

Next, the principle of recording magnetic information is the same as that during reproduction. That is, magnetic information to be recorded stored in the controller 62 and magnetic information including conditions newly set by exposure processing are recorded by the magnetic head 21 while the negative film 104 is being conveyed.

According to this embodiment, the recording position of the magnetic recording layer in the width direction of the negative film during writing is adjusted by moving the magnetic head 20 using the pulse motor 54, and the pulse motor 42 is adjusted so as to match the azimuth angle during writing. Since the adjustment is made by driving the magnetic head 20 and rotating the magnetic head 20, signal deterioration due to track or azimuth angle deviation can be minimized, and misreading and poor reading can be prevented.

〔Effect of the invention〕

As explained above, the magnetic information reading device according to the present invention has the excellent effect of being able to read magnetic information with high precision by adjusting the deviation in the width direction of the photographic film and the deviation in the azimuth angle of the magnetic recording layer.

In this embodiment, the pulse smoke 42 is driven to rotate the magnetic head 20 by ±45 degrees, but the rotation is not limited to plus or minus 45 degrees.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a photographic processing apparatus to which the present invention is applied, FIG. 2 is a schematic diagram of the printing process, FIG. 3 is a perspective view of the magnetic head and its surroundings, and FIG. 4 is a diagram of the magnetic head. FIG. 5 is a plan view showing the rotation state of the magnetic head, and FIG. 5 is a control flowchart for adjusting the position of the magnetic head. DESCRIPTION OF SYMBOLS 10... Negative conveyance device, 20... Magnetic head, 42... Pulse motor (rotation drive means), 44...
Rotating shaft, 48... Timing belt (transfer means), 54...
Pulse motor (moving means), 56... Rotating shaft, 62... Controller (first and second positioning means), 64... Reading circuit (first and second signal reading means), 78. ... Memory, 80 ... Guide rail, 82 ... Long hole, 104 ... Negative film (photographic film).

Claims (3)

[Claims] (1) A magnetic information reading device that reads magnetic information recorded on a magnetic recording layer provided on a photographic film using a magnetic head, wherein the magnetic head is arranged in a direction perpendicular to a direction along a track of the magnetic recording layer. moving means for moving the magnetic head and the photographic film relative to each other so as to move the magnetic head relative to the photographic film; a switching means for selectively switching to a second position for scanning; and a photographic film so that the magnetic head moves in a direction along the track and in a direction perpendicular to the track with the magnetic head switched to the second position. a first signal reading means for detecting a read signal when scanning is performed while moving the magnetic head relative to the magnetic head; and a first positioning means for positioning the magnetic head at a movement position corresponding to a peak value of the read signal; A magnetic information reading device having: (2) A magnetic information reading device that uses a magnetic head to read magnetic information recorded on a magnetic recording layer provided on a photographic film, and a rotational drive means that rotates the magnetic head about a direction perpendicular to the film surface. a second signal reading means for detecting a read signal when the magnetic head is rotated about the axis while conveying the photographic film; A magnetic information reading device comprising: second positioning means for positioning a head; (3) transporting the photographic film provided with the magnetic recording layer;
A magnetic information reading device for reading magnetic information recorded on the magnetic recording layer, comprising: width direction moving means for moving the magnetic head in the width direction of the photographic film; and width direction moving means for moving the magnetic head in a direction perpendicular to the film surface. a first signal reading means for detecting a read signal when the magnetic head is moved in the width direction of the photographic film and scanned while conveying the photographic film; a first positioning means for positioning the magnetic head at a movement position corresponding to a peak value; and rotating the magnetic head about the axis while transporting the photographic film at the position determined by the first positioning means. A magnetic information reading device comprising: a second signal reading means for detecting a read signal when the magnetic head is rotated; and a second positioning means for positioning the magnetic head at a rotation angle corresponding to a peak value of the read signal.