JP2822893B2 - Film transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a light-emitting portion and a light-receiving portion which are divided into one side and the other side of a film conveyed by a conveying means, at a position opposed to a portion where a perforation is formed. And a film transport device that detects the movement of the perforation based on an output signal of the light receiving unit and controls the transport of the film.

[0002]

2. Description of the Related Art Such a film transport apparatus controls the transport of a film for processing such as detection of image information of the film, printing of the image information of the film, or cutting of the film. In such a film transport apparatus, conventionally, light emitted from the light emitting unit and passing through the perforation forming portion of the film is simply transmitted toward the light receiving unit.

[0003] The above prior art will be described with reference to FIGS. 6 to 9. FIG. 7A shows the form of the film. The pieces 2b are arranged at a substantially equal pitch in the longitudinal direction of the film. Perforations 2a are arranged at equal pitches on both sides of the piece in the width direction. FIG. 7C schematically shows an optical sensor for detecting perforation, and the light emitting unit 40
And a light receiving section 41 are provided to face each other with the film 2 interposed therebetween. FIG. 6 is a diagram illustrating a perforation detection unit according to the related art. The light emitting section 40 and the light receiving section 41 are arranged at positions facing each other with the film 2 interposed therebetween. The slit plate 42 has an elongated slit 42a as shown in FIG. 8, and is arranged such that the slit width matches the film transport direction. Of the light emitted from the light emitting section 40, the light L2 passing through the perforations 2a reaches the light receiving surface 41a of the light receiving section 41 as it is. On the other hand, the light L1 that has reached the base surface or the milk material surface of the film is light L
1 '. The light emitted from the light emitting section 40 is restricted to the width A in FIG. 6 by restriction walls 43 and 44 provided in the device. Note that the light L1 that has reached the film is diffused when it hits the film, and extra light reaches the light receiving unit 41, causing a reading error. In order to eliminate such a problem, the light reaching the light receiving surface 41a is restricted by the slit plate 42.

The output signal obtained by the light receiving section 41 is shown in FIG.
The signal is as shown in (b). FIG. 9 is an enlarged view of this. FIG. 9B shows the relative positional relationship between the perforations and the luminous flux from the light emitting unit 40 as the perforations move. The emitted light beam has a circular shape with a diameter d. In (a) and (e), the luminous flux is
All have reached the film surface. In this case, the light receiving unit 4
Light that reaches 1 takes the path of L1 and L1 '. In (c), all the emitted light beams pass through the perforations, and the light reaching the light receiving unit 41 takes the path of L2. (B)
(D) is a state in which the emitted light beam passes through the edge of the perforation. In this case, the light path of the emitted light beam reaching the light receiving section 41 takes two paths, L1, L1 'and L2. The ratio of the amount of light passing through the two paths differs depending on the relative positional relationship between the perforations and the emitted light flux. Accordingly, the signal waveform output from the light receiving section 41 is as shown in FIG. That is, the output gradually increases in a sine wave form from the time point x1 at which the emitted light beam approaches perforation, and becomes saturated in the state of (c). When the luminous flux moves away from the perforation, the output gradually decreases. That is, the signal waveform near the perforation changes gradually.

Here, a method for detecting a perforation edge from the output signal will be described. A threshold level Vs (for example, 5 V) is set at a substantially average point between the minimum output value V1 and the maximum output value V2 of this output waveform. If the output signal is larger than Vs, it is determined to be a perforation unit, and if the output signal is smaller than Vs, it is determined to be a film unit. That is, in FIG. 9A, it is determined that a perforation is between the time points x2 and x3. However, since the edge of the actual perforation exists at the time of x1, x4, the error of the width D1, D2 determined by x1 and x2 and the width D1 and D2 determined by x3 and x4 with respect to the actual correct perforation width C. Will occur. That is, by making D1 and D2 as small as possible, the perforation detection error can be reduced.

As a method of reducing the detection error, it is conceivable to lower the threshold level Vs. The output value V1 detected in the state shown in FIGS. 9B, 9A, and 9E is determined by the density of the snake on the film 2, but the density varies depending on the type of the film. Therefore, there is a limit to reducing the level Vs in order to perform stable perforation detection.
On the other hand, by reducing the size of the luminous flux,
Although it is possible to reduce the detection error, there are also technical limitations in this regard.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is possible to reduce the perforation detection error as much as possible without complicating the structure of the apparatus, thereby improving the edge of the perforation. It is to perform detection with high accuracy. Accordingly, it is an object of the present invention to provide a film processing apparatus capable of controlling the transport amount of the film with higher accuracy.

[0008]

A film processing apparatus according to the present invention is arranged such that a light-emitting portion is divided into one side and the other side of a film conveyed by a conveying means at a position opposed to a portion where a perforation is formed. A light receiving unit is provided, and the output signal of the light receiving unit, a film transport device that detects the movement of the perforation and controls the transport of the film, on an optical path connecting the light receiving unit and the light emitting unit, And, between the light receiving portion and the film surface, a lens whose aperture angle is limited so as to pass only a part of the light going to the light receiving portion through the perforation forming portion of the film is provided. It is a point. According to a second feature configuration of the present invention, in the first feature configuration, the lens is a rod-type lens,
This is a point where the image on the film surface is arranged so as to form an image on the light receiving section. According to a third aspect of the present invention, in the above first or second aspect, the light receiving unit is provided in a processing unit unitized to include the transport unit and an opening for processing the film. The point is that the light emitting unit and the lens are provided. According to a fourth aspect of the present invention, in the first, second, or third aspect, the output signal from the light receiving section is compared with a reference signal.
It is configured to create a binarized signal and to detect the edge of the perforation based on the binarized signal.

[0009]

According to the first feature of the present invention, only a part of the light which passes through the perforation forming portion of the film and travels toward the light receiving portion is passed between the light receiving portion and the film surface. Is provided with a lens having a limited opening angle, so that light that is to enter the lens at an angle larger than the limited opening angle does not reach the light receiving surface. That is, the same effect as when the luminous flux of the light emitting unit is reduced can be achieved. According to the second characteristic configuration of the present invention, the film surface forms an image on the light receiving surface by the rod type lens. That is, the transmitted light beam on the film surface forms an image on the light receiving surface.

According to a third aspect of the present invention, an apparatus for detecting perforation of a film is provided in a processing unit together with a driving roller for transporting the film. According to the fourth feature configuration of the present invention, it is possible to compare the output signal waveform from the light receiving section near the edge of perforation with the reference signal.

[0011]

According to the above-mentioned first characteristic configuration, an effect equivalent to a reduction in the luminous flux of the light-emitting portion can be achieved. Therefore, the output signal waveform from the light-receiving portion near the edge of the perforation can be obtained. Can be changed more rapidly than in the above-mentioned conventional example. Therefore, the edge of perforation can be detected with high accuracy. According to the second characteristic configuration, the film surface forms an image on the light receiving surface. Therefore, even if the light receiving surface of the light receiving unit is reduced and the light receiving unit is reduced in size, it is possible to form the image on the film surface where perforations exist. Can be accurately caught by the light receiving surface.

According to the third characteristic configuration, the unit for transporting the film and the device for detecting perforation in transporting the film are unitized, so that the film can be easily attached to a photographic printer or the like. According to the fourth characteristic configuration, the output signal waveform from the light receiving unit near the edge of the perforation is compared with the reference signal, and the rising and falling portions of the binarized output signal are used to determine the edge of the perforation. Since the detection can be performed, the edge portion of the perforation can be accurately detected even if the density of the film existing portion in the portion where the perforation is formed in the film fluctuates.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a photographic printing apparatus as an example of a film processing apparatus will be described below with reference to the drawings. As shown in FIG. 1, the photoprinting apparatus 1 includes a scanner unit SC as a film processing unit that detects image information of the film 2 and an exposure unit that projects and exposes the image information of the film 2 onto a photographic paper 3 as a photosensitive material. EX, a development processing unit DE for developing the exposed photographic paper 3, and a controller CO for controlling the operation of each unit. The controller CO and the scanner unit SC for inputting various control instructions are provided in the controller CO. Is connected to a monitor MT for displaying image information and the like read by.

When the film 2 to be printed is inserted into the scanner unit SC, image information of the film 2 is read for each frame by the scanner unit SC, and the image information is sent to the controller CO. The film 2 whose image information has been read by the scanner unit SC is transported to the exposure unit EX. The controller CO determines the exposure condition for each frame based on the image information of the film 2 read by the scanner unit SC, and will be obtained when the photographic paper 3 is projected and exposed according to the determined exposure condition. The image is simulated and displayed on the monitor MT.

The operator of the photoprinting apparatus 1 operates the monitor M
In view of the display of T, if an appropriate image has not been obtained, a correction instruction for the determined exposure condition can be input from the console O, and the controller CO corrects the exposure condition based on the correction instruction to make the final adjustment. Determine the exposure conditions. Based on the determined exposure conditions, the operation of each part of the exposure unit EX is controlled, and the image information of the film 2 is projected and exposed on the photographic paper 3 drawn from the photographic paper magazine 4. The photographic paper 3 on which the exposure has been completed is conveyed to the development processing section DE where the photographic paper 3 is developed, and is discharged in a state of being cut one by one corresponding to each frame of the film 2.

Hereinafter, the configuration of each unit will be described. The scanner unit SC includes a light source 50 that irradiates the film 2 for reading image information, a mirror tunnel 50a that uniformly mixes light from the light source 50, and a scanner unit that conveys and positions the film 2 in the scanner unit SC. A film transport unit U1, an image sensor 51 as a light receiving unit for converting image information of the film 2 into an electric signal, and
A reading lens 52 for forming image information of the film 2 on the image sensor 51 is provided.

The exposure section EX includes an exposure light source 60, and a dimming filter 61 for adjusting the color balance of the light emitted from the exposure light source 60 by the yellow, magenta, and cyan filters entering and leaving the exposure optical path. , Mirror tunnel 6 that uniformly mixes light whose color balance has been adjusted by dimming filter 61
2. A film transport unit U2 for the exposure unit for transporting and positioning the film 2 in the exposure unit EX,
A printing lens 63 for forming an image of the image information on the photographic paper 3;
A shutter 64, a transport roller 65 for transporting the printing paper 3, and a motor 66 for driving the transport roller 65 are provided. The light control filter 61 and the shutter 64 are controlled by the controller CO, and the position of each filter of the light control filter 61 and the opening time of the shutter 64, that is, the exposure time, are controlled in accordance with the exposure condition determined by the controller CO. The motor 66 conveys the printing paper 3 in a frame-feeding state under the control of the controller CO.

Although illustration is omitted in the developing section DE,
There are provided a plurality of processing tanks filled with a plurality of processing liquids for developing the exposed photographic paper 3 and a cutter for cutting the photographic paper 3 having undergone the development processing for each frame. Hereinafter, the configurations of the scanner unit film transport unit U1 provided in the scanner unit SC and the exposure unit film transport unit U2 provided in the exposure unit EX will be described.

The film transport unit U1 for the scanner section
Since the main structure of the film transport unit U2 for the exposure unit is the same as that of the film transport unit U2 for the exposure unit, the configuration of the film transport unit U2 for the exposure unit will be described first. The difference between the configurations will be briefly described. The exposure unit transport unit U2 has a structure in which an upper unit 7 and a lower unit 8, which are a pair of frames, are pivotally connected so as to swing and open and close, and are urged to return to the open side by a spring (not shown). FIG. 2 shows a state in which the upper unit 7 and the lower unit 8 are closed, and FIG. 3 shows a state in which the upper unit 7 and the lower unit 8 are open. The film 2 is inserted in the direction of arrow A and discharged in the direction of arrow B.

As shown in FIGS. 3 and 4, the lower unit 8 includes drive rollers 80a, 80b, 80c, 80d,
80e, a lower guide 8 which guides and supports the left and right end portions of the film 2 and depresses a portion of the film 2 which is to pass through the image surface.
1. A motor 83a for driving the driving roller 80a via a belt 82a, and driving rollers 80b, 80c, 80d, 8
Motor 83 for interlockingly driving the motor 0e via a belt 82b.
b, a light emitting portion 85a of the DX code detecting optical sensor 85 for detecting the DX code of the film 2, a light emitting device 86a of the perforation detecting optical sensor device 86 for detecting the perforation of the film 2, and the film 2
And a negative mask 88 having an opening 88a for defining an area of the image portion of the film 2 to be printed on the photographic paper 3. The light emitting portion 87a of the image detection optical sensor 87 for detecting the image portion of FIG. The details of the light emitting device 86a will be described later. The negative mask 88 has a full size, half size, panorama,
Alternatively, the opening 88a is configured to be changeable according to high density or the like.

In the upper unit 7, as shown in FIG.
An upper guide 90 that supports and guides the left and right ends of the film 2 together with the lower guide 81 and that is depressed at a portion where the film 2 is to pass through the image surface is provided.
Is an upstream portion 90 formed on an upstream support member 91a located on the upstream side of the film 2 transport path with the location of the negative mask 88 through which the irradiation light from the exposure light source 60 passes.
a, and a downstream portion 90b formed on a downstream support 91b located downstream of the film 2 transport path.

The upper unit 7 is mounted on the upstream support 91a.
The pressing units 89a, 89b, 89c installed at positions opposed to the driving rollers 80a, 80b, 80c, respectively, with the unit and the lower unit 8 closed, the light receiving unit 85b of the DX code detecting optical sensor 85, and perforation detecting The light receiving device 86b of the optical sensor device 86, the light receiving portion 87b of the image detecting optical sensor 87, and the downstream supporting member 91b are respectively opposed to the driving rollers 80d and 80e when the upper unit 7 and the lower unit 8 are closed. The pressure rollers 89d and 89e and the exit roller 92 are provided at positions where the pressure rollers 89d and 89e are located. The details of the light receiving device 86b will be described later.

Next, the operation of the film transport unit U2 for an exposure section having the above-described structure will be schematically described. When the film 2 is inserted into the exposure section film transport unit U1, the film 2 is driven by the driving rollers 80a, 80b, 80c, 80d,
80e and pressure rollers 89a, 89b, 89c, 89d,
It is conveyed in a state in which the left and right ends are sandwiched between the left and right sides of the sheet 89e.
The driving rollers 80a, 80b, 80c, 80d, 8
0e, pressure rollers 89a, 89b, 89c, 89d, 8
9e, the belts 82a and 82b and the motors 83a and 83b function as film transport means. During this conveyance, the image detecting optical sensor 87 discriminates and detects the image portion and the snake portion of the film 2, and a control circuit (not shown) provided in the lower unit 8 based on the detected information. The operation of the motor 83b is controlled to appropriately stop the image portion of the film 2 in the opening 88a of the negative mask 88, and the exposure process is executed under the control of the controller CO. The transport control of the film 2 is performed by the perforation detection optical sensor device 86 detecting the movement of the perforation.

The film transport unit U1 for the scanner section
Has an outer diameter shape shown in FIG. 5, the film 2 is inserted in the direction of arrow C, and is discharged in the direction of arrow D. The internal configuration and operation of the film transport unit U1 for the scanner unit are almost the same as the internal configuration of the film transport unit U2 for the exposure unit, and the film transport unit U1 for the scanner unit schematically shown in FIG. The transporting means N which has the same configuration. A different configuration is a negative mask configuration.

While the opening 88a of the negative mask 88 of the exposure unit film transport unit U2 is configured to be changeable, the negative mask of the scanner unit film transport unit U1 has a screen size of the full-size film 2. Are fixedly installed. In a state where the frame of the film 2 located in the opening, that is, the portion where the image information is recorded is located, the image sensor 51
, The image information is read, and the installation position of the negative mask is a processing position where the image information of the film 2 is detected.

The film transport unit U1 for the scanner unit and the film transport unit U2 for the exposure unit are usually used by being installed on a support 40 in the state shown in FIG. FIG.
In the installation state shown in FIG. 5, the opening 30 of the film transport unit U1 for the scanner unit is located on the optical axis of the irradiation light of the light source 50 of the scanner unit SC, and the film transport unit U2 for the exposure unit
The opening 88a of the negative mask 88 is located on the optical axis of the irradiation light from the exposure light source 60, and is set at the film transport position of the scanner unit SC and the exposure unit EX, respectively. . In this set state, the film 2 transport path of the film transport unit U1 for the scanner unit and the film transport unit U2 for the exposure unit are connected in series.

When the film transport unit U1 for the scanner unit and the film transport unit U2 for the exposure unit are arranged in the state shown in FIG. 5, when the film 2 is inserted into the film transport unit U1 for the scanner unit, the scanner unit is transported. S
The image information of the film 2 is sequentially read by the image sensor 51 of C, and the film 2 from which the reading of the image information has been completed is directly inserted into the film transport unit U2 for an exposure unit, and is sequentially exposed.

Next, a detailed description of the perforation detecting device will be given based on FIGS. Components corresponding to those of the conventional device of FIG. 6 described above are given the same numbers. The light emitting section 40 and the light receiving section 41 are arranged at positions facing each other with the film 2 interposed therebetween. The light emitting unit 40 is configured by an element such as a light emitting diode. The tip 40a of the light emitting section has a substantially spherical shape, and has a function of condensing light to some extent. The light emitted from the light receiving unit 40 is limited to the width A in FIG. 6 by the restriction walls 43 and 44 provided in the processing device. The light receiving section 41 is configured by an element such as a phototransistor and has a light receiving surface 41a. The light receiving unit 41 generates an output signal according to the amount of light that has reached the light receiving surface 41a. A rod-type lens 45 is arranged on the front surface of the light receiving section 41. The rod type lens 45 includes a light emitting unit 40 and a light receiving unit 41.
Are arranged on the optical path L connecting The optical axis of the rod-shaped lens 45 and the optical path L are arranged substantially coincident with each other.

The film 2 is transported between the light emitting section 40 and the rod type lens 45 in the direction of the arrow in FIG. The transport direction of the film 2 is orthogonal to the optical axis L. The amount of light reaching the light receiving surface 41a is different between the case where the perforation 2a of the film 2 is on or near the optical axis L and the case where the perforation 2a is off the optical axis L.

Next, the outline of the rod type lens 45 will be described. The rod type lens is a refractive index distribution type lens and is a micro lens 45 having a substantially cylindrical external shape as shown in FIG. For example, there is a lens called Selfoc lens (manufactured by Nippon Sheet Glass). here,
Assuming that the length in the longitudinal direction of the micro lens 45 is z and the coordinate in the radial direction is r, for example, in this micro lens 45, n ² (r) = n ² (0) [1- (gr) ² ]. It has a refractive index distribution represented by equation (1). The light has a property of bending toward a higher refractive index, and the micro lens 45a
By appropriately selecting the length z, a convergent lens can be obtained. That is, it is possible to adopt a configuration in which an image is formed on a surface on the light receiving surface 41a. In FIG. 12, the upper surface side in the drawing of the film surface 2 is configured to form an image on the light receiving surface 41a.

The film 2 includes a milk surface 2c and a base surface 2c.
In FIG. 12, the base surface 2d is provided on the light emitting unit 40 side.
Are arranged so as to face each other, and the milk material surface 2c is provided on the light receiving section 41 side.
Are arranged to face each other. The light emitted from the light emitting section 40 has a luminous flux regulated by the width A in FIG. As shown in FIG. 6 of the conventional example described above, this light becomes light L1 'that is attenuated to some extent from light L1 that has reached the base surface 2d of the film. Perforation 2 of film 2
The light that has reached “a” directly reaches the entrance 45 a of the rod-shaped lens 45. The opening angle θmax of the rod-shaped lens 45 is determined, and light that is going to be incident on the rod-shaped lens 45 at an angle equal to or greater than θmax is the difference between the refractive index of the rod-shaped lens 45 and the refractive index of air. Due to the relationship, the light is reflected at the entrance 45a. For example, FIG.
Since the incident angle is larger than the aperture angle θmax, the light ray L2 is reflected by the entrance 45a and
It cannot be incident inside.

Therefore, when the size of the light beam that can be incident on the rod type lens 45 is represented on the film surface, it becomes the width W in FIG. That is, light that is going to enter the entrance 45a from a range exceeding the width W on the film surface is reflected at the entrance 45a. In other words, the size of the luminous flux of the light emitted from the light emitting unit 40 is the size of the width A in FIG. 12, but the fact that the light can reach the light receiving surface 41a is determined by the width W on the film surface. It is a luminous flux of a size. By providing the rod type lens 45 in this way, the same effect as reducing the emitted light beam can be achieved. In FIG. 12, the width W is shown to be large for easy understanding, but the width is actually smaller.
Since the light reaching the light receiving surface 41a is regulated by the width W on the film surface, it is not necessary to provide a slit plate on the front surface of the light receiving surface 41a. Further, there is a case where light reaching the film surface is diffused. However, since the light is limited by the opening angle θmax as described above, the light receiving surface 41a is hardly affected by such a diffused light. .

Next, the output signal waveform obtained from the light receiving section 41 of FIG. 12 is shown in FIG. The same reference numerals are used for portions corresponding to FIG. 9 showing signal waveforms obtained by the conventional device. In FIG. 11 (b), d 'is the size of the emitted light beam as viewed on the film surface, and is also the size of the light beam actually formed on the light receiving surface 41a. The size of d 'is considerably smaller than d of the conventional device shown in FIG. Therefore, comparing the output signal waveform with that of FIG. 9, the time for changing between the minimum output value V1 and the maximum output value V2 is reduced. That is, the slope of the output signal waveform when changing from the minimum output value V1 to the maximum output value V2 or from the maximum output value V2 to the minimum output value V1 increases. Assuming that the threshold level is Vs, it is determined that the edges of the perforation are the points of time x2 'and x3' in FIG. The actual perforation edge is x
Since they are 1 and x4, the detection errors are represented by D10 and D20 in FIG. 11, and are considerably improved as compared with the conventional apparatus in FIG.

The output signal waveform from the light receiving section (41) in FIG. 11 (a) is binarized into a 0 level and 1 level signal as shown in FIG. 11 (2). That is, the threshold level V
When the output signal is larger than s, the level is 1; when the output signal is smaller than the threshold level Vs, the level is 0. The rising portion and the falling portion of the binarized signal waveform are determined to be perforation edges by the determining means provided in the control means (not shown).

[Other Embodiments] Other embodiments will be listed below.
In the above embodiments, the rod type lens is described as the lens, but the lens is not limited to this, and may be another type of refractive index distribution type lens that can achieve the object of the present invention.

In the above embodiment, the refractive index distribution in the rod type lens is described by the formula (1). However, the present invention is not limited to this, and there are various modifications. Also, the rod type lens is described as being in close contact with the light receiving surface,
The present invention is not limited to this, and may be slightly separated from each other due to the convenience of the device configuration. By bringing the two into close contact, the effect of the invention can be effectively exerted.

In the above embodiment, the light emitting diode is described as the light emitting portion. However, the light emitting portion is not limited to this, and may be an incandescent lamp, an EL plate, or other various light emitting members. In addition, various types of light, such as visible light, near-infrared light, and infrared light, can be used according to the characteristics of the light receiving unit. Although the phototransistor has been described as the light receiving unit, the light receiving unit is not limited to the phototransistor but may be another element that can detect light. .

In the above-described embodiment, the transport means for transporting the film is described as being composed of a driving roller, a pressure roller, a belt, and a motor, but is not limited to this. For example, each roller may be driven by a motor, or a film may be conveyed by a sprocket instead of the roller. Various modifications may be made.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the structure shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram according to an embodiment of a photographic printing apparatus to which the present invention is applied.

FIG. 2 is a perspective view of a main part according to the embodiment of the present invention.

FIG. 3 is a perspective view of a main part according to the embodiment of the present invention.

FIG. 4 is a plan view of a main part according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram of an operation of a main part according to the embodiment of the present invention.

FIG. 6 is an enlarged view of a main part of a detection device according to a conventional device.

FIG. 7 is a schematic diagram of a film and a detection signal.

FIG. 8 is an enlarged perspective view of a slit plate according to a conventional apparatus.

FIG. 9 is an output signal waveform diagram of a light receiving unit according to a conventional device.

FIG. 10 is an enlarged perspective view of a rod-type lens according to an embodiment of the present invention.

FIG. 11 is an output signal waveform diagram of a light receiving unit according to the embodiment of the present invention.

FIG. 12 is an enlarged view of a main part according to the embodiment of the present invention.

[Explanation of symbols]

 2 Film 2a Frame 31a Opening 50 Light source 51 Light receiving section SC, EX Film processing means N Film transport means

Claims (4)

(57) [Claims] 1. A film (2) conveyed by a conveying means (N), which is divided into one side and the other side of the film (2) at a position facing a portion where a perforation (2a) is formed. 40) and a light receiving section (41) are provided. The film conveying apparatus detects movement of the perforation (2a) based on an output signal of the light receiving section (41) and controls conveyance of the film (2). A perforation (2a) in the film (2) on the optical path connecting the light emitting section (40) and the light receiving section (41) and between the light receiving section (41) and the film surface.
A lens (4) whose aperture angle is limited so that only a part of the light passing through the portion where
5) A film transport device provided with: 2. The perforation according to claim 1, wherein the lens (45) is a rod-shaped lens, and is arranged so that an image on a film surface is focused on the light receiving section (41). Detection device. 3. A processing unit (U1, U2) unitized to include the transport means (N) and openings (30, 88a) for processing the film (2).
3. The film transport device according to claim 1, wherein the light emitting unit (40), the light receiving unit (41), and the lens (45) are provided therein. 4. A binarized signal is created by comparing an output signal from the light receiving section (41) with a reference signal (Vs), and an edge of the perforation (2a) is generated based on the binarized signal. The film transport device according to claim 1, wherein the film transport device is configured to detect the following.