JP3201391B2 - Film cameras and film for photography - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a film camera and a photographic film.

[0002]

2. Description of the Related Art Currently, 35 mm film for general photography (System 135) is JIS or IS.
O and the like.

FIG. 12 shows a part of the prescribed size (the tolerance is omitted). The width of the film 1 is 35 mm, the facing distance of the perforation 2 for feeding the film is 25 mm, and the width of the perforation 2 is 25 mm. The pitch is 4.75 mm. Then, for such a film 1, the frame 3 is 24 m in the width direction of the film 1.
m, and is formed in a rectangular shape having a size of 36 mm in the length direction, and the pitch of the pieces 3 is 38 mm, which is eight times the pitch of the perforations 2 as a reference.

At present, the photographic film generally widely used is the above-mentioned 35 mm film. As a method of improving the image quality, particularly the resolution, of the film 1, the photosensitive agent applied to the i-film is improved. ii Increase the width of the film to make the pieces larger. Can be considered.

[0005]

However, in general, the fineness of the particles of the photosensitive agent, that is, the resolution, is inversely proportional to the film sensitivity. Therefore, unless a new photosensitive agent is discovered, the image quality can be improved by the i-term. It is difficult. In this regard, according to the method of item ii, the image quality can be improved with the current photosensitizer, but the increase in the width of the film 1 results in an increase in size and weight of the camera. Does not match the current trend of miniaturization and weight reduction.

[0006] The perforations 2 are through holes provided on both sides of the film 1.
The film 1 is fed by driving the sprocket of the camera, and the feed amount of the film 1 is determined by the rotation amount of the sprocket. Therefore, the perforation 2 is indispensable for the film 1 and the camera.

[0007] However, when the perforations 2 are present, when data such as the photographing date and time is imprinted on the film 1, the data is imprinted in the positions shown in FIGS.

That is, FIG. 1A shows a case where the data 4 is printed inside the frame 3, which is widely practiced by a general compact camera or the like, and can imprint the shooting date on printed photographic paper. However, it is not suitable for enthusiasts or professional photographers.

FIG. 1B shows a case where data 4 is printed between frames 3 and 3. In this case, when a slide is made, the film 1 is placed at the position of data 4.
Would be inconvenient because it would be necessary to cut the slide frame. Further, even in the case of a negative film, it is necessary to keep the film 1 long at the time of DPE and at the time of storage. Further, at the time of printing, the data 4 cannot be imprinted on the photographic paper. Even if the data 4 can be printed, when the frame 3 is photographed so as to be horizontally long, the characters indicating the data 4 lie horizontally. It becomes unnatural.

Further, FIG. 1C shows a case where the data 4 is printed so as to straddle the frame 3 and its outer frame on the perforation 2 side, but the data 4 is printed when printing on photographic paper. It is still inconvenient when there are no slides.

[0011]

SUMMARY OF THE INVENTION A film type camera according to the present invention eliminates a patrone storage section, a film storage section, and a sprocket drive through hole, and has a 2.5 mm width between a film edge and a frame to be exposed. 1.2 mm from this edge on the center line
A fixed distance between the through holes provided at the position of 5 mm indicates the position of the frame exposed in the photographable area and the length of the frame in the film winding direction, and the photographing is possible so that the aspect ratio of the frame becomes 9:16. The length of the area in the film width direction and the distance between the through holes are set, and information indicating the standard of the film is recorded at a position near the edge. The film is inserted between the cartridge storage section and the film storage section. A winding means, a detecting means for detecting the through hole, a control means for controlling the winding means in accordance with a detection signal from the detecting means, and an aspect ratio of the frame of 9 in the photographable area positioned by the winding means. A means for exposing so as to form a pair 16 and a distance between the exposed frame and the film edge side opposite to the film edge side having the through-hole are 2.5.
mm width, in a non-porous area where information can be optically recorded, and a photographic information recording means for recording information relating to a photographic date and an exposure state formed by the control means. When the film is positioned by the winding means with respect to the frame, one through-hole detected by the detecting means is arranged, and information on the photographing date and exposure state is recorded for the frame. is there.

Further, the photographic film of the present invention has no through hole for driving a sprocket and 1.25 mm from the edge of the film.
The fixed distance between the through holes provided at the position of mm indicates the position of the frame exposed in the photographable area and the length of the frame in the film winding direction, and the photographing is possible so that the aspect ratio of the frame becomes 9:16. The length of the area in the film width direction and the distance between the through holes are set, one through hole is provided for each frame exposed in the photographing area, and information indicating the standard of the film is provided at the edge of the frame. A non-porous area where information is recorded optically at 2.5 mm from the edge of the film that is recorded in the vicinity and is opposite to the edge of the film having the through-hole, and is photographed by a camera that exposes the film. It is non-porous so that information can be recorded.

According to the present invention, the sprocket driving through-hole is eliminated from the film 1, and the effective photographing area is enlarged. Further, the data 4 can be imprinted on a position near the edge of the film 1, and the effective photographing area can be expanded.

That is, in this case, the camera is not increased in size and weight. In addition, the equipment such as the current film manufacturing equipment and the processing equipment of the photographed film can be utilized as it is, and the present equipment can be used in combination with the equipment for the current 35 mm film. For example, a device that cuts a wide film coated with a photosensitizer into a width of 35 mm, a standardized patrone manufacturing device, or a device that winds a cut film into the patrone is automated and becomes a large-scale facility. However, these facilities can be used as they are.

Further, the processes after photographing, that is, the processes of developing, printing, and stretching are also automated, and all the processing devices are designed on the basis that the width of the film is 35 mm. Changing is impractical.

Thus, the width of the film is
It is practical to improve the image quality by setting it to 35 mm, which is equal to the mm film.

Meanwhile, the current 35 mm film has a width of 35 mm, but the length of the frame in the width direction is 24 mm, and the effective photographing area is narrow.
This is because the perforations 2 for the sprocket of the camera to feed the film are provided on both sides of the film.

On the other hand, with the advance of computerization in cameras, drive control by a motor can be performed with considerable accuracy.
Experiments have confirmed that the film can be driven with sufficient accuracy without using a conventional large sprocket and perforation 2.

Therefore, the perforations 2 are removed from the 35 mm wide film 1, and the length of the frame in the film width direction is increased to the position where the perforations 2 are located. That is, by doing so, the substantial effective photographing area can be enlarged by about 40%, and accordingly, the image quality can be improved accordingly.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a film camera and a photographic film according to the present invention.

In this example, as shown in FIG. 7A, the width of the film 1 is 35 mm, which is equal to the current film width, and no perforation is provided. The length of the frame 3 in the film width direction and the length in the film length direction of the frame 3 as the effective shooting area are 30 mm and 40 mm.
And Further, the pitch of the piece 3, that is, the film 1
Is 42.0 mm.

However, the size and pitch of this piece 3 are
This is for the current television broadcasting system, and therefore, the aspect ratio of the frame 3 is 3: 4.

When dealing with HDTV (so-called high-vision), the size of the frame 3 is 30 mm × 53.3 mm and the pitch is 57.7, as shown in FIG.
5 mm. Note that the aspect ratio is 9:16.

Further, the above numerical values are for the full size, and for the half size, the size of the frame 3 is 30 mm × 22.times. In the current television broadcasting system as shown in FIGS. 5mm, pitch 26.2mm, HD
In the case of TV, the size of the piece 3 is 30 mm × 16.9 mm,
The pitch is 21.0 mm.

Although not shown, the film 1 having the above-mentioned format is housed in a cartridge (cartridge) similar to the existing 35 mm film.

Therefore, if the length of the frame 3 in the film width direction is 30 mm as shown in FIGS.
Since this is 1.25 times the current length of 24 mm in the film width direction of a 35 mm film, the image quality (resolution) is improved by 25%.

If the length of the frame 3 in the film length direction is also enlarged at the same ratio, 1.25 ×
1.25 ≒ 1.56, which is a 56% improvement in image quality. Further, comparing the area per frame, the current is: 24 mm × 36 mm = 864 mm ² FIG. 7A: 30 mm × 40 mm = 1200 mm ² , the area of one frame increases by about 39%, that is, about 39%. The image quality is improved. Furthermore, if the image quality is the same, the image can be enlarged even more.

Also, as shown in FIGS. 3C and 3D, the long side of the frame 3 is close to the width of 36 mm in the current film length direction of the current full size even in the half size. Obtainable.

Further, since the length of the frame 3 in the film width direction is 30 mm, a non-photographing area of 2.5 mm can be obtained between the frame 3 and both edges of the film 1. It is possible to secure the flatness of the film 1 at the time of photographing, control the film 1, or read and write data. Further, since it is not necessary to provide a sprocket for film feeding in the camera, the camera can be reduced in size and weight.

Further, when feeding the film 1, the film 1
Since there is no perforation, the feed amount of the film 1 is detected by, for example, a detection roller that comes into contact with the film 1. However, if the pitch of the frame 3 is the above value, these values are 42.0 mm. = 5.25 mm × 8 57.75 mm = 5.25 mm × 11 26.25 mm = 5.25 mm × 5 21.0 mm = 5.25 mm × 4, all being integral multiples of 5.25 mm, and 5.25 mm = Π × 3.34 mm / 2.

Therefore, the feed amount of the film 1 can be determined by setting the diameter of the detection roller to 3.34 mm and detecting an integer number of rotations. The detection means can be simplified.

FIG. 8 shows another example of the pitch of the piece 3. In the case of this pitch, 44.0 mm = 6.28 mm × 7 56.5 mm = 6.28 mm × 9 25.1 mm = 6.28 mm × 4 18.8 mm = 6.28 mm × 3 6.28 mm = π × 4.00 mm / 2, and the number of rotations of the detection roller becomes an integer number of times.
The resolution also becomes 1/2 rotation.

FIG. 9 shows a case where a small hole 6 is provided in the film 1 for detecting the feed amount of the film 1, and a magnetic mark or the like may be used instead of the small hole 6 as described later. That is, in the format shown in FIG. 7, as shown in FIG.
A small hole 6 having a diameter of, for example, 1 mm at a pitch of 5.25 mm,
Is provided. Similarly, in the format shown in FIG. 8, small holes 6 are provided at a pitch of 6.28 mm as shown in FIG. 9B.

Since the pitches of 5.25 mm and 6.28 mm of these small holes 6 are determined on the basis described above, the pitches can be adapted to the current television broadcasting and HDTV, and can be applied to both full size and half size. Can respond. That is, at the time of film feeding, the number of small holes 6 is counted by a photo interrupter using infrared light, and the like.
When this number is reached, if film feeding is stopped, frames 3 are formed on the film 1 at the correct pitch.

FIG. 3 is a partial sectional view of an example of a camera according to the present invention, and a section parallel to a bottom surface of a dark box portion of the camera is taken as a section. FIG. 4 is a rear view with the back cover removed.

The center of the body 11 is a dark box 12, and a lens 13 is provided in an opening in front of the box.
Further, one inside part of the body 11, the left side in the figure, is a patrone storage part 14, and a film supply shaft 15
The patrone 5 containing the above-described film 1 is set so as to be fitted to the supply shaft 15 at the time of photographing.

Further, a film winding shaft 16 is provided on the other inner side of the body 11, that is, on the right side in the figure. Although not shown, the winding shaft 16 is driven by a motor to wind up the film 1. The winding surface of the winding shaft 16, as shown in FIG. 17 are coated, and around the winding shaft 16, for example, three film guides 18A to 18C are provided.

The guides 18A to 18C are linear in a direction parallel to the center axis of the winding shaft 16 and arc-shaped in a direction orthogonal to the center axis. And guides 18A-18C
One end on the arc side is supported by the body 11 and the other end thereof is brought into contact with the winding shaft 16 by a torsion spring (not shown). Further, film holding rollers 10A to 10C are provided at the ends of the guides 18A to 18C on the winding shaft 16 side, respectively.
6 is supported so as to be parallel to the central axis.

Then, for example, the roller 10 of the guide 18A
The diameter of A is the above-mentioned size, and a part of the roller 10A is a permanent magnet 31 magnetized with NS in the radial direction. A magnetic sensor 32 is provided on the guide 18A so as to face the magnet 31. Have been.

The opening behind the dark box 12 is a rectangular opening (aperture) 19 of, for example, 30 mm (film width direction) × 40 mm (film length direction) corresponding to the frame 3 of the film 1 described above. ing. However, the opening 19
Since the light reaching the film 1 from the lens 13 at the time of photographing does not come into close contact with the film 1 and is not a parallel light beam, the size of the frame 3 of the film 1 is set to 30.
mm × 40 mm, the size of the opening 19 is 30 mm
Slightly smaller than × 40 mm.

Further, behind the dark box 12, the opening 1
9, a pair of film guide rails 21 and 22 are provided in parallel along the opening 19 and at least over the range of the opening 19 on both sides in the film width direction.

FIGS. 1 and 2 show an example of a data imprinting apparatus. FIG. 1 is a front view of a back cover showing an entire state thereof, and FIG. 2 is a front view of a main part in a state where a film pressure plate is removed. FIG.

That is, the front of the back cover 41 has the opening 19
A film pressure plate 42 having a rectangular shape larger than the opening 19 is provided at a position opposed to the opening 19, and the pressure plate 42 extends over, for example, the upper long side of the frame 3 of the film 1 (the long side in the full size). At the opposing position, the through hole 43
Is formed.

The through hole 43 is faced with, for example, a six-digit day-shaped light emitting element 44 such that the six-digit arrangement direction is the film length direction. In this case, the element 44 is pivotally supported near the center of the switching lever 45, and one end of the lever 45 is pivotally supported by the back cover 41 by the pin 46.

Therefore, as shown in FIGS. 2A and 2B,
When the free end of the lever 45 is moved up and down in the film width direction around the pin 46, the element 44 moves in the film width direction. At this time, the element 44 is guided by the guide rail 47 and is moved in the film width direction. It is made to move in parallel. At this time, although not shown, the toggle spring stabilizes the element 44 at the position shown in FIGS. 2A and 2B.

The element 44 is connected to a system controller (not shown) through a cable 48 and a contact 49. Reference numeral 51 denotes a patrone pressing spring.
Further, the viewfinder, aperture, shutter, and the like are configured in the same manner as a current camera. A film feed amount detection circuit as shown in FIG. 6 is provided.

According to such a configuration, at the time of photographing, the patrone 5 is set in the storage section 14, and the film 1 reaches the winding shaft 16 from the patrone 5 via the opening 19. Then, at this time, the film 1 is pressed against the winding shaft 16 by the film guides 18A to 18C and the pressing rollers 10A to 10C, so that when the winding shaft 16 rotates, the film 1 is wound on the winding shaft 16. That is, the film 1 is fed without perforation.

When feeding the film, the film 1
The rollers 10A to 10C and the magnet 31 rotate in response to the feeding of the magnet, and the rotation of the magnet 31 is detected by the sensor 32. The detection output is counted by the counter 33 as shown in FIG. It is supplied to the system controller 34.

The system controller 34 is used to set the operation of the whole camera, for example, the aperture value and the shutter speed. The system controller 34 guides each time the film 1 is fed by 5.25 mm or 6.28 mm. Since the roller 10A of 18A makes one rotation, the feed amount of the film 1 is detected by the count output of the counter 33, and the drive of the winding shaft 16 is driven through the drive amplifier 35 so that this becomes a count value corresponding to the size of the frame 3. The amount of rotation of the motor 36 is controlled. Therefore, the film 1 is fed at the pitch of the frame 3 corresponding to the format.

At the time of photographing, when the free end of the lever 45 is lowered as shown in FIG.
Since the position 4 is located below the through hole 43, the data 4 is printed inside the piece 3 and at a position along the upper long side as shown in FIG.

When the free end of the lever 45 is raised as shown in FIG.
, So as shown in FIG.
The data 4 is imprinted outside the frame 3 and at a position along the upper long side.

FIG. 11A shows the film 1 by the element 44.
B shows an example of data 4 that can be imprinted on
Indicates an example of characters that can be used as data 4. Thus, according to this example, the light emitting element 44 is provided so as to be able to face the inside and outside of the frame 3 and
Since the perforations 2 are eliminated from the data, the data 4 can be printed at any position inside or outside the frame 3.

Further, by moving the light emitting element 44, the data 4
Is switched between the inside and outside of the frame 3, so that the cost is lower than in the case where two light emitting elements are provided inside and outside the frame 3, respectively.

In the above description, the film 1 may be either a positive film or a negative film. Further, it is also possible to imprint photographing data or the like in a non-effective photographing area between the edge of the film 1 and the frame 3, or to record the data of the standard of the film 1 in advance. Further, the small holes 6 may be formed at one ratio for each frame, and the small holes 6 may be replaced by magnetic marks or the like.

[0055]

According to the present invention, the sprocket driving hole is eliminated from the film 1 and the effective photographing area can be enlarged. Further, photographing data or the like can be imprinted in a non-effective photographing area between the edge of the film 1 and the frame 3, or data indicating the standard of the film 1 can be recorded in advance. Further, the data 4 can be imprinted at a position near the edge of the film, and the useful photographing area can be expanded.

[Brief description of the drawings]

FIG. 1 is a front view of a back cover of an example of an embodiment of a film camera of the present invention.

FIG. 2 is a front view of a main part of FIG.

FIG. 3 is a partial cross-sectional top view of an example of an embodiment of the film camera of the present invention.

FIG. 4 is a rear view of the film-type camera according to the embodiment of the present invention, in which a back cover is taken.

FIG. 5 is an exploded perspective view of a main part of an example of the embodiment of the film camera of the present invention.

FIG. 6 is a block diagram for explaining the present invention.

FIG. 7 is a diagram for describing the present invention.

FIG. 8 is a diagram for describing the present invention.

FIG. 9 is a diagram for describing the present invention.

FIG. 10 is a diagram for describing the present invention.

FIG. 11 is a diagram for describing the present invention.

FIG. 12 is a diagram for describing the present invention.

FIG. 13 is a diagram for describing the present invention.

[Explanation of symbols]

1 film, 3 frames, 4 data, 5 patrone, 12 dark box, 14 patrone storage, 1
6 film winding shaft, 21, 22 guide rail, 32 sensor, 34 system controller,
36 ‥‥ drive motor, 44 ‥‥ light emitting element

Claims (4)

(57) [Claims] 1. A cartridge storage section, a film storage section, and a sprocket driving through-hole are eliminated to expose a film edge.
On the center line of 2.5 mm width between the frames to be formed, a fixed interval between the through holes provided at a position of 1.25 mm from the edge is the position of the frame exposed to the photographable area. Indicates the length of the frame in the film winding direction, the length of the photographable area in the film width direction and the distance between the through holes are set so that the aspect ratio of the frame is 9:16, and information indicating the standard of the film. Means for winding the film recorded at a position near the edge between the patrone storage section and the film storage section; detection means for detecting the through-hole; and detection signal from the detection means. Control means for controlling winding means; means for exposing the photographable area positioned by the winding means such that the aspect ratio of the frame is 9:16; and a film edge side having the through-hole. In 2.5mm width between the frame to be exposed and oriented films edge side, optically
The imperforate areas where information can be recorded, consists of a photographic information recording means for recording information about the shooting date and the exposure state of being formed by said control means, by means of the exposure, the winding relative to frame to be exposed
When positioning the film by lifting means,
One through-hole detected by the detection means is provided,
Record information on the shooting date and exposure status for frames
Film camera, characterized in that it has. 2. The film camera according to claim 1, wherein the film surface to be exposed is kept flat by a pair of first and second guide rails and a pressure plate, and the film is in contact with the guide rail and the pressure plate. At the position near the edge,
A film camera having a head for recording information. 3. The film camera according to claim 2, wherein the head is at least 1.25 mm from the other side edge of the film via a through hole that opens opposite to a position near the edge of the film. A film-type camera for recording at a position near an edge. 4. A sprocket driving through-hole is eliminated, and a fixed interval between the through-holes provided at a position 1.25 mm from the edge of the film is determined by the position of a frame exposed to a photographable area and the length of the frame in the film winding direction. shows the ri, the spacing of the length of the film width direction of the photographing area and the through hole as the aspect ratio is 9:16 in the frame is set, the shooting territory
One piece of the through hole is arranged for the frame exposed to the area, information indicating the standard of the film is recorded at a position near the edge, and the film is opposed to the edge of the film having the through hole. in 2.5mm from the film edge side, information optically
A photographic film characterized in that a recordable non-porous area is made non-porous so that photographing information can be recorded by a camera that exposes the film.