JP3056139U - Line-sequential scanning screen imaging device - Google Patents

Abstract

(57) [Summary] [Problem] A line capable of sharply photographing a line-sequential scanning screen, such as not causing exposure unevenness when photographing a line-sequential scanning screen and focusing on the entire screen. Provided is a progressive scanning screen imaging device. SOLUTION: A photographing member 1 having a lens 11 and a shutter 12 and a fixed member 2 are provided, and the lens 11 has a distance from a center of the lens to a central portion of the visual field and a distance from the center of the lens to a peripheral portion of the visual field. Has an effective aperture to include the entire subject at different distances within the depth of field,
The shutter 12 has a time for displaying one screen by line-sequential scanning or an exposure time longer than that, and the fixed member 2 is a distance at which the field of view of the photographing member is the entire screen or a partial area of the screen. And a structure for fixing the photographing member in a direction in which the optical axis of the lens of the photographing member is perpendicular to the center of the visual field. One end is attached to the photographing member 1, and the other end is brought into contact with the subject 3. The member 1 is fixed.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a photographing apparatus for photographing a line-sequential scanning screen. For example, the present invention relates to a photographing apparatus used for clearly photographing an image displayed on a home television without uneven exposure.

[0002]

[Problems to be solved by conventional techniques and devices]

 Conventionally, an optical camera has been widely used to photograph a certain scenery or the like, but this camera is used to photograph a screen to be displayed by scanning the screen line-sequentially, such as a screen of a home television. In order to do so, special settings are required, and if the settings are incorrect, there is a problem that clear shooting is impossible.

[0003] Specifically, such a line-sequential scanning screen does not display the entire screen at a certain moment, but displays light spots having a certain size by scanning the screen. Therefore, the exposure time required for the time required for one vertical scan by the line sequential scanning (hereinafter, abbreviated as one vertical scan period) was required. For example, for a broadcast signal in the NTSC format, which is a common broadcasting format in Japan, since one vertical scanning period is set to 1/60 second, it is necessary to secure an exposure time of at least 1/60 second. was there. Similarly, in the PAL format, it was necessary to secure an exposure time of 1/50 second or more. The adjustment of the exposure time is usually performed by adjusting the shutter speed.

Further, when the shutter speed is set to one vertical scanning period or more, the number of times of scanning an arbitrary place on the line-sequential scanning type screen differs depending on the selection. This caused exposure unevenness that caused shading in photographs depending on the number of scans. In other words, in order to expose the entire screen uniformly, an exposure time that exactly matches one vertical scanning period of the TV is secured, or a period in which the TV display operation and shutter opening / closing timing are good and there is no brightness on the TV screen. There was no other way but to let the shutter release the shutter so that it overlapped.

[0005] In addition, for taking a picture of a screen, it is preferable to take a picture at a close distance in consideration of the angle of the picture. It was difficult to set the whole screen to be included within the depth of field. In particular, TV screens often have a shape that is a part of a sphere cut out, and if the screen is not a flat CRT, the difference in the distance is even greater, and it is impossible to take clear pictures of the entire screen. It was difficult.

According to the present invention, it is possible to easily photograph a line-sequential scanning screen by photographing such a line-sequential scanning screen without causing exposure unevenness and clearly photographing the entire screen. It is an object of the present invention to provide a line-sequential scanning screen photographing apparatus (hereinafter, may be simply referred to as a photographing apparatus).

[0007]

[Means for Solving the Problems]

 As a result of intensive studies, the present inventors have found that the above configuration can be solved by adopting the following configuration, and have completed the present invention. The present invention comprises a photographing member having a lens and a shutter, and a fixing member, wherein the lens is located at different distances from a center of the lens to a central portion of the visual field and a distance from a center of the lens to a peripheral portion of the visual field. The shutter has an effective aperture for including the whole within the depth of field, the shutter has a time for displaying one screen by line-sequential scanning or an exposure time longer than that, and the fixed member has It has a structure to fix the imaging member in a direction where the field of view is the entire screen or a partial area of the screen and the optical axis of the lens of the imaging member is perpendicular to the center of the field of view. A line-sequential scanning type screen photographing apparatus characterized in that the photographing member is fixed by attaching the other end to the subject.

In the present specification, the screen means a line-sequential scanning type screen to be photographed, and does not mean an image shown on a film which is usually used when photographing with a camera. The field of view of the photographing member means a range that can be photographed by the main-line sequential scanning screen photographing apparatus.

[0009] The image capturing apparatus of the present invention is effective to fit the entire subject at different distances from the center of the lens to the center of the field of view and the distance from the center of the lens to the periphery of the field of view within the depth of field. It is necessary to employ a lens having an aperture. As a result, when shooting at a relatively short distance, an image is formed even on the entire portion where the distance between the central portion of the visual field and the peripheral portion of the visual field is different, and the entire screen can be clearly captured. . Here, the effective aperture includes not only the diameter of the lens itself but also the case where it is stopped down by a stop, and refers to the diameter of a lens that functions effectively effectively. Specifically, by reducing the effective aperture of the lens, the depth of field is increased, and this requirement is achieved.

In the present invention, the effective aperture of the lens is used as a parameter for obtaining the depth of field that forms an image on the entire subject. Here, the depth of field means the width of the distance between the film surface and the subject that appear to be in focus with respect to the subject at a different distance. As a result, the depth of field is When the distance is deep, it has a property that it is easy to form an image on a subject at a farther distance. The depth of field is similar to the depth of field, but this is the depth of field projected onto the inside of the device, and it can be considered as having substantially the same meaning. Therefore, in the present invention, the depth of field is used in a sense almost synonymous with the depth of focus, and is interpreted as a depth of focus which is not affected by other parameters than the effective aperture of the lens. It is possible to

The fixing member fixes the photographing member in a direction in which the field of view of the photographing member is the entire screen or a partial area of the screen and the optical axis of the lens of the photographing member is perpendicular to the center of the field of view. It is provided for the purpose. More specifically, for example, a rod-shaped arm or the like has a structure in which the relative distance between the photographing member and the subject is determined by being brought into contact with the television device as the subject. In this way, it is necessary that the distance determined by the fixing member has a relationship in which the screen is projected over the entire field of view of the photographing member. Since various sizes of screens are used for the television device, the length of the fixing member is adjusted according to the size of the screen, and the relative distance between the television device and the photographing member is changed so that the screen covers the entire field of view. Can be projected.

A second aspect of the present invention includes a photographing member having a lens and a shutter, and a fixing member, wherein the lens has a distance from a center of the lens to a central portion of the visual field and a distance from a center of the lens to a peripheral portion of the visual field. The shutter has an effective aperture for including the entire subject at different distances within the depth of field, the shutter has a time for displaying one screen by line-sequential scanning or an exposure time longer than that, and the fixed The member includes a frame portion and an arm portion. The fixed member has a length corresponding to a field of view of the photographing member in a region surrounded by the frame portion, and the arm portion is attached to the photographing member. A line-sequential scanning screen photographing apparatus characterized in that the photographing member is fixed in a direction in which the optical axis of the lens of the photographing member is perpendicular to the center of the visual field by bringing the photographing member into contact with a subject. It is an effect.

The present invention relates to a line-sequential scanning type screen photographing apparatus capable of confirming an area to be photographed in advance by the structure of the fixing member. The fixing member described in the present invention includes a frame portion and an arm portion. The frame portion has a frame shape, and can be specified by surrounding an arbitrary area. The arm portion is used by being attached to a photographing member. And a structure for relatively determining the distance between the photographing member and the frame portion. The distance determined in this manner is such that the area surrounded by the frame portion becomes the field of view of the photographing member. By adopting the fixing member having such a structure, a portion to be photographed when photographing a television screen is surrounded by a frame portion, so that an image on the screen shown in the enclosed area is directly photographed. Can be done.

A third aspect of the present invention is that the exposure unevenness of a photograph (hereinafter referred to as “scanning unevenness”) caused by the difference in the exposure amount due to the difference in the number of scans at a specific portion on the screen exposed to the film surface while the shutter is open. In order to eliminate the problem, there is provided a photometric device and an exposure control device, and the exposure control device releases the shutter in synchronization with a signal emitted from the photometric device.

[0015] Further, by providing the calculating means, the timing of a period during which there is no screen brightness for a certain period or more in the signal of the photometric means is calculated, and the shutter is released at that timing to perform scanning during the exposure time. Can be made uniform over the entire field of view.

[0016]

[Embodiment of the invention]

 FIG. 1 is a schematic view showing the concept of the line sequential scanning type screen photographing apparatus of the present invention. In FIG. 1, 1 is a photographing member, 2 is a fixed member, and 3 is a line-sequential scanning type screen.

The photographing member 1 includes at least a lens 11 and a shutter 12. The lens 11 has an effective aperture for including within the depth of field subjects at different distances from the center of the lens to the center of the field of view and the distance from the center of the lens to the periphery of the field of view. It is necessary to be. That is, since the photographing device according to the present invention aims to photograph a screen such as a television, it is preferable that the distance between the photographing device and the photographing device is relatively short. Therefore, for example, compared to landscape photography, the relative ratio of the distance between the subject in the center of the field of view and the subject in the periphery becomes larger, and the lens is selected so that the entire field of view is in focus. It is preferable to use a lens having a small effective aperture.

The focal length of the lens 11 affects the range of the field of view of the photographing device. Generally, the shorter the focal length, the wider the field of view. Therefore, it is preferable to select a lens with a short focal length in order to maintain a short photographing distance and photograph a wide angle range. It should be noted that a colored lens can be used for correcting the color temperature generated by the screen. The angle of spread of the field of view of the photographing member differs depending on the selected lens, and the fixing member is designed based on this field of view as described later.

The structure and type of the shutter 12 are not particularly limited as long as the exposure time can be at least one vertical scanning period by line-sequential scanning. For example, conventionally used focal plane shutters and lens shutters can also be suitably used. In addition, a liquid crystal shutter or the like can be used in combination in order to uniformly expose the entire film surface. In the case of television broadcasting in Japan, since one vertical scanning period is 1/60 second and 1/2 interlacing is employed, the exposure time is preferably 1/30 second or more.

Further, more preferably, the exposure time is preferably a natural number multiple of one vertical scanning period of an image, and according to this, the number of scans of the entire screen is likely to be uniform.

The fixing member 2 is attached to the photographing member to fix the distance and the direction of the photographing member 1 from the television screen. And fixed at a fixed distance in the direction perpendicular to the center of the. The fixed distance when fixed in this way is determined by the structure of the fixing member, and the distance at that time should be such that the entire television screen or most of the television screen is present in the entire field of view of the photographing member. It must be designed.

This distance may be determined in consideration of the focal length of the lens used for the photographing member, and the fixed member is designed so that the field of view that expands with a distance becomes, for example, a distance that matches the television screen. I do. Specifically, as shown in FIG. 2, the visual field at the distance a is Va and the visual field at the distance b is Vb. Here, assuming that the visual field Vb at the distance b is the size of the television screen, if a fixing member having such a size as to fix the distance to the television screen at the distance b is attached, the entire visual field is set to the television. It can be a picture with the screen. On the other hand, if the photograph is taken at a distance c that is longer than the distance b, the photograph is a photograph in which the television screen is shown in a part of the photograph. That is, in the present invention, the structure of the fixing member is determined uniformly according to the type of the selected lens and the size of the television screen as the subject. Since the aspect ratio of the visual field is determined by the shape of the so-called easel mask of the photographing member, the shape of the easel mask in the present invention is preferably 3: 4 or 9:16, which is the same as that of the television screen.

The structure of the fixing member is not particularly limited, and any shape may be used as long as it can perform the above function. Specifically, for example, any rod may be used as long as the distance between the television device and the photographing member can be uniformly determined by attaching one end to the photographing member and bringing the other end into contact with the television device. . The structure of the connection to the photographing member is not particularly limited as long as the two can be firmly joined together, such as a tenon and a tenon.

FIG. 3 is a schematic diagram of the line sequential scanning type screen photographing apparatus of the present invention having such a rod-shaped fixing member. In FIG. 3, the fixing member is composed of three rods 2a, 2b, and 2c, each having one end attached to the photographing member. Here, at the time of shooting, the other end 21a, 21b of the fixing member is brought into contact with the upper corner of the television screen, and the contact 21c is brought into contact with the lower end of the television screen, whereby a virtual area F1 specified by these three points is displayed. Match the screen. Further, the fixing member 2 is designed such that the area F1 is the field of view of the photographing member, so that when photographing in a fixed state, it is possible to take a photograph in which only the entire screen is taken up.

One of the preferable shapes of the fixing member is, for example, a fixing member having a frame portion 24 and an arm portion 23 as shown in FIG. The fixed member 2 having this shape has a length for uniformly determining the relative position between the frame portion 24 and the photographing member 1 at a distance such that an area F2 surrounded by the frame portion 24 matches the field of view of the photographing member. It has a structure having an arm portion 23. According to the fixing member 2 having such a shape, the region F2 surrounded by the frame portion is always a region photographed as a photograph. In use, the photographing device of the present invention is arranged so that the television screen is actually surrounded by the frame portion. The image displayed in the enclosed area can be taken as a photo as it is. Note that the shape of the easel mask in this case is preferably similar to the shape of the frame portion 24.

The photographing apparatus of the present invention may further include a light-blocking member that plays a role of blocking light other than light emitted from the screen as light entering the field of view. By providing such a light blocking member, only light emitted from the screen can be clearly photographed. The shape and structure of the light-shielding member are not particularly limited, and those that exhibit the above functions are included in the light-shielding member of the present invention.

Further, there is no particular problem even if the light shielding member is formed of one component as the fixed light shielding member together with the fixing member. Specifically, for example, the cylindrical body can serve as a light-blocking member that blocks light other than light emitted from the screen, and can also serve as a fixing member that fixes the imaging unit under the above conditions. Therefore, it can be suitably used as a fixed light shielding member. Such a cylindrical fixed light-shielding portion may be, for example, a quadrangular prism-shaped member or a member having different shapes at both ends, for example, a truncated quadrangular pyramid-shaped member.

The fixed light-blocking member having a cylindrical shape has one end attached to the photographing member so that the lens 11 of the photographing member 1 is located inside the cylinder, and the other end is in contact with a screen as a subject to shield light. At this time, in order to prevent reflection of light emitted from the screen, a plurality of grooves may be provided on the inner wall as a measure for preventing reflection. Further, it is preferable that, when the imaging device is fixed as described above, the area of the cylindrical body at the other end is such that a region surrounded by the fixed light shielding member substantially matches the field of view of the imaging device. In FIG. 1, θ is the angle of view of the photographing member, which is fixed by the fixed light-blocking member, and is located on the screen surrounded by the fixed light-blocking member 2d at the distance between the screen and the photographing member that is relatively determined. The area matches the field of view of the imaging member. In addition, if the shape of the cylindrical body is a substantially square pyramid having a head shape and the angle of the adjacent hypotenuse is made to coincide with the angle of view, the shape of the cylindrical body is always in the field of view of the imaging member regardless of the length of the fixed light shielding member. This is preferable in that a matched area can be specified.

Note that a small window may be provided on the cylindrical fixed light shielding member to check the state of the screen. In this case, it is preferable to use a slit-shaped small window or to provide smoked glass in order to reduce light incident from the small window.

It is preferable that the photographing apparatus of the present invention has a film feed mechanism, which is a mechanism for feeding 35 mm film or the like used in a photographing member and an angle of view of the photographing apparatus. It includes the so-called easel mask that determines the Normally, television screens have an aspect ratio of 3: 4 or 9:16, while the angle of view used in ordinary photographs is about 2: 3. When the screen was shot at the full angle of view, the left and right sides of the photo were completely aligned. In the present invention, in consideration of this point, it is preferable to set the easel mask of the film feed mechanism to have the same ratio as the screen.

The photographing device of the present invention may further include a photometric device and an exposure control device. FIG. 5 is a diagram showing the configuration of the photographing apparatus according to the present invention, which includes a photometric unit and an exposure control unit, and is controlled to release a shutter in synchronization with a luminance signal emitted from the photometric unit. In the figure, reference numeral 14 denotes a photometric unit, 15 denotes an exposure control unit, and 16 denotes a photographing switch.

The photometric unit 14 measures light emitted from a screen as a subject. In the present invention, since the light-shielding member having the light-shielding member blocks light other than light emitted from the subject, by measuring the presence or absence of light in the field of view of the photographing member, when the light-shielding member is not provided, In addition, photometry is possible by detecting light emitted from the screen. The structure of the photometric means is not particularly limited, but is not particularly limited, for example, a photodiode, a phototransistor, a CDS photocell, or the like, as long as it generates some kind of electric signal when exposed to light. is not. Considering the sensitivity of detection, a phototransistor is optimal.

The location where the photometric means is provided is not particularly limited. For example, the photometric means may be provided beside the lens 11 or may be provided between the lens and the shutter inside the photographing member. . Further, for example, when a cylindrical fixed light shielding member is used, it may be provided on the inner wall thereof.

In the scanning of the line-sequential scanning type screen, the scanning lines usually move from the upper left to the lower right, and there are horizontal blanking periods and vertical blanking periods during which there is no luminance. Therefore, for example, the luminance signal emitted by the photometric means is as shown in FIG. 6, and a signal in a square wave state in which the luminance is not confirmed during the vertical blanking period and the horizontal blanking period is obtained. Become. Further, a portion where the screen image is black has no scanning line, and a period during which such a portion is scanned corresponds to a period where the screen has no brightness. Therefore, when attention is paid to one horizontal scanning period, only the portion corresponding to the black portion of the image captured on the screen has no luminance, and the required luminance signal is the horizontal blanking period and the black image. During the scanning period (hereinafter, sometimes referred to as a black scanning period), a square wave signal having no luminance as shown in FIG. 7 can be obtained.

The exposure control unit 15 releases the shutter 11 in synchronization with the signal obtained by the photometric unit 14. The synchronization of such a signal is not particularly limited, but it is preferable to release the shutter in synchronization with a portion having no luminance. Specifically, by releasing the shutter in a portion where there is no luminance and setting the exposure time to a natural number multiple of one vertical scanning period, it is possible to prevent the scanning of the screen from overlapping during the shooting time. Considering the time from when the shutter completely opens to when the shutter completely closes, it is difficult to exactly match the exposure time with one vertical scanning period, so as shown in FIG. Is also preferably slightly longer. FIG. 8 is a diagram illustrating the timing of opening the shutter. Normally, in the line-sequential scanning type, the exposure at the scanning portion of the screen corresponding to the protruding portion is duplicated, which causes scanning unevenness. In the present invention, for example, as shown in FIG. 8, when the shutter is released in synchronization with the signal corresponding to the vertical blanking period and the exposure time is set to one vertical scanning period, the shutter is opened vertically. By starting during the blanking period, double exposure of scanning can be prevented, and a photograph without scanning unevenness can be obtained.

Note that the method of synchronizing the luminance signal from the photometric means is not limited to the above method. For example, the shutter may be opened in synchronization with a non-luminance part and the shutter may be closed in another non-luminance part, or the exposure time may be set in advance to a natural value of one vertical scanning period as described above. It may be set to several times, and only the opening is performed in synchronization with the luminance signal.

The photographing switch 16 is used to start photographing with a photographing member, and performs a function corresponding to a shutter button of a conventional camera. However, the present invention differs from the shutter button in that the shutter is not released at the same time as the photographing switch is pressed, but merely plays a role of issuing an allowable signal to the exposure control means. That is, at the same time that the image capturing apparatus determines the relative position with respect to the screen by the fixing member 2, the photometric means starts measuring the presence or absence of luminance on the screen, and the exposure control means is ready to start releasing the shutter. In such a case, the photographing switch 16 plays a role of actually allowing the release of the shutter to be released.

FIG. 9 is a diagram showing the configuration of a line-sequential scanning type screen photographing apparatus according to the present invention, which further includes a calculating means. In the figure, reference numeral 17 denotes an operation means. The arithmetic means in the present invention means a means for selecting only a signal corresponding to a preset luminance signal from the luminance signals obtained from the photometric means 14 and transmitting the selected signal to the exposure control means. The calculating means may be composed of one functional block, or as shown in FIG. 9, a plurality of functional blocks may be combined to constitute one calculating means.

As described above, three types of non-brightness periods from the photometric means 14 include a horizontal blanking period, a vertical blanking period, and a period during which a black image is scanned. Depending on the image taken, there is a width in that period. In other words, when there is a thin black line on the screen, when scanning over that line, an extremely short non-luminous period will occur. If the exposure control means opens the shutter in synchronization with the non-luminance period, double exposure of scanning is likely to occur and the resulting image tends to be uneven. For example, the function of the arithmetic means is to select only a non-luminance period equal to or longer than the vertical blanking period set to 1250 μs and to send a signal to the exposure control means to release the shutter.

[0040]

【Example】

 FIG. 10 is a perspective view schematically showing a line sequential scanning type screen photographing apparatus according to the present invention. In the drawing, reference numeral 1 denotes a photographing member, and 2a denotes a fixed light shielding member.

In the photographing apparatus according to the present embodiment, the fixed light shielding member 2 d has a truncated quadrangular pyramid shape, and the side of the pyramid coincides with the angle of view determined by the lens 14 of the photographing member. The side surface has a bellows region J, and the size of the region surrounding the subject can be adjusted. Therefore, for example, the bellows can be shortened when photographing the entire 14-inch screen, and the bellows can be lengthened when photographing the entire 15-inch screen. A deformable sponge 21 is attached to the inner end face of the bellows 22 of the fixed light shielding member 2d to prevent light from entering from a gap between the bellows 22 and the screen.

The fixed light-shielding member 2 d is provided with a small window 22 for confirming the state of the screen at the time of photographing, and the state of the screen can be confirmed through the finder 19 of the photographing member. By looking through the viewfinder 19 during shooting, the influence of light entering from the viewfinder 19 can be reduced. Further, by attaching a smoke acrylic plate to the finder 19, the influence of light is reduced, and the contrast of the screen is increased, so that the display screen can be easily checked.

On the inner wall of the fixed light shielding member 2d, a surface treatment is performed in black by painting or the like so that light emitted from the screen is reflected and indirect light does not enter the lens, and a groove (not shown) is provided to prevent total reflection. ing.

FIG. 11 is a perspective view schematically showing a photographing member of the photographing apparatus. In this embodiment, a lens 11, a photometric unit 14 composed of a phototransistor, a photographing switch 16, a grip 18, and a finder 19 are shown in the drawing as the components constituting the photographing member 1.

The lens 11 used for the photographing member 1 has a short focal length in order to increase the angle of view. In this regard, although a lens having a long focal length can be used, in order to photograph the same area, the length of the fixed light-shielding member becomes long, which is not convenient for use. Further, a colored lens is used to correct the color temperature of the screen.

When photographing a screen using the present photographing apparatus, the relative position to the screen is determined by holding the grip 18 and bringing the end surface of the fixed light-shielding member into contact with the screen, and the trigger button-shaped photographing is performed. Pressing switch 16 releases the shutter.

The photometric means composed of a phototransistor attached to the photographing member measures the presence or absence of light on the screen and transmits a luminance signal. The electrical configuration of the photographing member is the same as that shown in FIG. In this embodiment, the arithmetic means is a central processing unit 171, a read only memory (ROM) 172, a random access memory (RAM) 173, an input port 174a from a photographing switch, an input port 174b from a photometric means, and an output port 175. Consists of

[0048] The luminance signal transmitted from the photometric means is input to the arithmetic means through the input port 174b. In the arithmetic means, the central processing unit 171 stores the luminance signal in the ROM 172, measures the length of the non-luminous period based on a program, and stores the information in the RAM 173 at the same time. In the present embodiment, the shutter is set to release only during the non-luminance period longer than the vertical blanking period (1250 μsec). In a still screen, the same signal is emitted every one vertical scanning period, so that the calculation means can predict the start of the non-luminance period under the above condition by the calculation.

When the non-brightness period corresponding to the above condition is started, a signal for starting the release of the shutter is transmitted to the exposure control means through the central processing unit 171 output port 175, so that the exposure control means Opens the shutter.

In this embodiment, the shutter is used in combination with a mechanical shutter and a liquid crystal shutter to prevent the timing of mechanical scanning from being delayed. As a result, accurate shutter timing and exposure time can be obtained. The exposure time is automatically set as a natural number multiple of one vertical scanning period (1/60 second in the NTSC system), and is automatically set based on the luminance information obtained from the photometer.

An aperture is provided to determine the effective aperture of the lens, and the aperture can be switched according to the luminance information obtained from the photometric means and the sensitivity of the film used.

According to the line sequential scanning type screen photographing apparatus of this embodiment, the exposure time is set to one vertical scanning period of the screen, and the shutter is released when there is no brightness such as a blanking period. Since the scanning is started, it is possible to prevent scanning unevenness due to a difference in the number of times of scanning. Further, the photographing member is completely fixed by the fixed light shielding member, and a clear photograph can be taken without the problem of disturbance light.

[0053]

[Effect of the invention]

 The present invention includes a photographing member having a lens and a shutter, and a fixing member, wherein the lenses are at different distances from a center of the lens to a center of the field of view and a distance from the center of the lens to a periphery of the field of view. The shutter has an effective aperture for including the entire subject within the depth of field, the shutter has a time for displaying one screen by line-sequential scanning or a longer exposure time, and the fixed member has It has a structure to fix the imaging member in a direction where the field of view of the member is the entire screen or a partial area of the screen and the optical axis of the lens of the imaging member is perpendicular to the center of the field of view. Since this is a line-sequential scanning screen photographing apparatus characterized by fixing the photographing member by attaching it to the photographing member and bringing the other end into contact with the subject, scanning unevenness occurs when photographing the line-sequential scanning screen. Without straining, and the like in focus on the entire screen, a line-sequential scanning screen can be clearly photographed.

As a second effect of the present invention, a fixing member includes a frame portion and an arm portion, and the fixing member has a length whose area surrounded by the frame portion matches the field of view of the photographing member. When the arm is attached to the imaging member and the frame is brought into contact with the subject, the imaging member is fixed so that the optical axis of the lens of the imaging member is perpendicular to the center of the visual field. In the case of, the image existing in the area previously surrounded by the frame part becomes a photograph, so that the convenience of shooting is improved.

[Brief description of the drawings]

FIG. 1 is a schematic view showing the concept of a line sequential scanning type screen photographing apparatus of the present invention.

FIG. 2 is a schematic diagram illustrating a relationship between a visual field and a photographing distance.

FIG. 3 is a schematic view showing an example of a line sequential scanning type screen photographing apparatus according to the present invention.

FIG. 4 is a schematic view showing another example of the line sequential scanning type screen photographing apparatus according to the present invention.

FIG. 5 is a diagram showing a configuration of the photographing apparatus according to the present invention, which is controlled so as to release a shutter in synchronization with a luminance signal emitted from a photometric unit.

FIG. 6 is an example of a luminance signal emitted by the present photometric means.

FIG. 7 is an example of a luminance signal corresponding to a horizontal scanning period.

FIG. 8 is a diagram illustrating the timing of opening a shutter.

FIG. 9 is a diagram showing a configuration of a line-sequential scanning type screen photographing apparatus according to the present invention including a calculating means.

FIG. 10 is a perspective view schematically showing a line sequential scanning type screen photographing apparatus according to the present invention.

11 is a perspective view schematically showing a photographing member of the photographing device in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Photographing member 11 Lens 12 Shutter 14 Photometry means 15 Exposure control means 2 Fixed member 21 Frame part 22 Arm part 2d Fixed light shielding member 3 Line-sequential scanning type screen

Claims (15)

[Utility model registration claims] 1. A photographing member having a lens and a shutter, and a fixing member, wherein the lenses are at different distances from a center of the lens to a center of the field of view and a distance from the center of the lens to a periphery of the field of view. The shutter has an effective aperture for including the whole subject within the depth of field, the shutter has a time for displaying one screen by line-sequential scanning or an exposure time longer than that, and the fixed member has It has a structure to fix the photographing member in a direction where the field of view of the member is the entire screen or a part of the screen and the optical axis of the lens of the photographing member is perpendicular to the center of the field of view, and one end is photographed A line-sequential scanning type screen photographing apparatus, wherein the photographing member is fixed by attaching the photographing member to a member and bringing the other end into contact with a subject. 2. A photographing member having a lens and a shutter, and a fixing member, wherein the lenses are at different distances from a center of the lens to a center of the field of view and a distance from the center of the lens to a periphery of the field of view. The shutter has an effective aperture for including the entire subject within the depth of field, the shutter has a time for displaying one screen by line-sequential scanning or an exposure time longer than that, and the fixing member has a frame. The fixed member has a length corresponding to the field of view of the photographing member, and the arm is attached to the photographing member, and the frame portion is brought into contact with the subject. A line-sequential scanning type screen photographing apparatus characterized in that the photographing member is fixed in a direction in which the optical axis of the lens of the photographing member is perpendicular to the center of the visual field. 3. A photographing member having a lens and a shutter, a fixing member, and a light-blocking member, wherein the lens has different distances from a center of the lens to a central portion of the visual field and a distance from the center of the lens to a peripheral portion of the visual field. Has an effective aperture for including the entire subject within the depth of field, the shutter has a time for displaying one screen by line-sequential scanning or an exposure time longer than that, Among the light incident on the field of view of the photographing member, those other than those emitted from the screen are blocked. Has a structure for fixing the photographing member in a direction perpendicular to the center of the visual field, and fixing the photographing member by attaching one end to the photographing member and bringing the other end into contact with the subject. The symptom, line-sequential scanning-screen imaging device. 4. A photographing member having a lens and a shutter, a fixing member, and a light-blocking member, wherein the lens has different distances from a center of the lens to a central portion of the visual field and a distance from the center of the lens to a peripheral portion of the visual field. Has an effective aperture for including the entire subject within the depth of field, the shutter has a time for displaying one screen by line-sequential scanning or an exposure time longer than that, The light incident on the field of view of the photographing member is cut off except for the light emitted from the screen. The fixing member includes a frame portion and an arm portion, and the region surrounded by the frame portion is a field of view of the photographing member. The arm part is attached to the photographing member, and the optical axis of the lens of the photographing member is perpendicular to the center of the field of view by bringing the frame part into contact with the subject. Line-sequential scanning type screen for capturing apparatus, characterized in that to fix the imaging member in countercurrent. 5. A photographing member having a lens and a shutter, and a fixed light shielding member, wherein the lenses are at different distances from a center of the lens to a center of the field of view and a distance from the center of the lens to a periphery of the field of view. The shutter has an effective aperture for including the entire subject within the depth of field, the shutter has a time to display one screen by line-sequential scanning or an exposure time longer than that, and the fixed light shielding member has In a cylindrical shape, an area surrounded by the other end has a length corresponding to the field of view of the imaging member, and one end is attached to the imaging member, and the other end is brought into contact with a subject, thereby forming a lens of the imaging member. A line-sequential scanning image characterized by fixing the photographing member in a direction where the optical axis is perpendicular to the center of the visual field and blocking light other than light emitted from the screen from light incident on the visual field of the photographing member. Surface imaging device. 6. A photographing member having a lens, a shutter, photometric means, and exposure control means, and a fixing member, wherein the lens has a distance from a center of the lens to a center of the visual field and a distance from the center of the lens to a peripheral part of the visual field. An effective aperture for including the entire subject at different distances within the depth of field, the photometric unit detects light in the field of view, and the exposure control unit detects a screen output from the photometric unit. The shutter is released in synchronization with a signal corresponding to a period in which no light is emitted, the shutter has a time for displaying one screen by line-sequential scanning or an exposure time longer than that, and the fixing member has A structure for fixing the photographing member in a direction in which the field of view of the photographing member is the entire screen or a part of the screen and the optical axis of the lens of the photographing member is perpendicular to the center of the field of view. , Attached at one end to imaging member, characterized by securing the imaging member by contacting the other end to the object, line-sequential scanning-screen imaging device. 7. An image pickup member having a lens, a shutter, photometric means, and exposure control means, and a fixing member, wherein the lens has a distance from a center of the lens to a central portion of the field of view and a distance from the center of the lens to a peripheral portion of the field of view. An effective aperture for including the entire subject at different distances within the depth of field; the photometric unit detects light in the field of view; and the exposure control unit emits light from a screen emitted from the photometric unit. Releasing a shutter in synchronization with a signal corresponding to a period of no light to be emitted, wherein the shutter has a time for displaying one screen by line-sequential scanning or an exposure time longer than that, and the fixed member has a frame. The fixing member has a length corresponding to a field of view of the photographing member in a region surrounded by the frame portion, and the arm is attached to the photographing member. Line-sequential scanning type screen for capturing apparatus characterized by securing the imaging member in a direction perpendicular to the central field-of-view portion of the optical axis of the lens of the imaging member by contacting the arm portion to the subject. 8. A lens having a photographing member having a lens, a shutter, photometric means, and an exposure control means, a fixing member, and a light shielding member, wherein the lens has a distance from a center of the lens to a central part of the visual field and a peripheral part of the visual field from the center of the lens. Has an effective aperture for including the entire subject at different distances within the depth of field, the shutter has a time for displaying one screen by line-sequential scanning or an exposure time longer than that. Wherein the photometric means detects the presence or absence of light in the field of view, the exposure control means releases a shutter in synchronism with a signal corresponding to a period without brightness emitted from the photometric means, The fixing member blocks light other than that emitted from the screen out of the light incident on the field of view, and the distance between the field of view of the image capturing member and the area of the entire screen or a part of the screen and the distance of the image capturing member. Has a structure for fixing the photographing member in a direction where the optical axis of the lens is perpendicular to the center of the field of view, and fixing the photographing member by attaching one end to the photographing member and bringing the other end into contact with the subject. Characteristic, a line-sequential scanning type screen photographing device. 9. A photographing member having a lens, a shutter, a photometric unit, and an exposure control unit, a fixing member, and a light blocking member, wherein the lens is a distance from a center of the lens to a central portion of the field of view and a peripheral portion of the field of view from the center of the lens. Has an effective aperture to include the entire subject at different distances within the depth of field, the photometric unit detects the presence or absence of light in the field of view, and the exposure control unit emits light from the photometric unit. The shutter is released in synchronization with a signal corresponding to a period of no brightness, the shutter has a time for displaying one screen by line-sequential scanning or an exposure time longer than that, and the light-blocking member is a photographing member. Of the light incident on the field of view, except for those emitted from the screen, wherein the fixing member comprises a frame portion and an arm portion, and the fixing member has an upper region surrounded by the frame portion. It has a length that matches the field of view of the photographing member, the arm part is attached to the photographing member, and the optical axis of the lens of the photographing member is perpendicular to the center of the visual field by contacting the frame part with the subject A line-sequential scanning type screen photographing apparatus characterized by fixing a photographing member in a direction. 10. A photographing member having a lens, a shutter, photometric means, and exposure control means, and a fixed light shielding member, wherein the lens has a distance from a center of the lens to a center of the visual field and a distance from the center of the lens to a peripheral part of the visual field. An effective aperture for including the entire subject at different distances within the depth of field; the photometric unit detects the presence or absence of light in the field of view; and the exposure control unit includes a luminance emitted from the photometric unit. The shutter is released in synchronization with a signal corresponding to a period without the image, the shutter has a time for displaying one screen by line-sequential scanning or an exposure time longer than that, and the fixed light shielding member has a cylindrical shape. The area surrounded by the other end has a length that matches the field of view of the photographing member. Line-sequential scanning, wherein the photographing member is fixed in a direction in which the optical axis of the lens is perpendicular to the center of the visual field, and light incident on the visual field of the photographing member other than that emitted from the screen is blocked. Photographing device for mold screen. 11. A photographing member having a lens, a shutter, a photometric unit, an exposure control unit, and a calculating unit, and a fixed member, wherein the lens has a distance from a center of the lens to a center of the visual field and a periphery of the visual field from the center of the lens. Having an effective aperture for including the entire subject at different distances to the unit within the depth of field, the photometric unit detects light in the visual field, and the arithmetic unit is obtained from the photometric unit. A signal-free period is calculated from the signal, and a signal is transmitted to the exposure control unit at a timing when the shutter is completely released within the period, and the exposure control unit transmits the light emitted from the screen emitted from the photometry unit. The shutter is released in synchronization with a signal corresponding to a non-existent period, and the shutter has a time for displaying one screen by line-sequential scanning or an exposure time longer than that. The fixing member is for fixing the photographing member in a direction in which the visual field of the photographing member is the entire screen or a partial area of the screen and the optical axis of the lens of the photographing member is perpendicular to the center of the visual field. A line-sequential scanning type screen photographing apparatus having a structure, wherein one end is attached to a photographing member, and the other end is brought into contact with a subject to fix the photographing member. 12. A photographing member having a lens, a shutter, a photometric unit, an exposure control unit, and a calculating unit, and a fixing member, wherein the lens has a distance from a center of the lens to a center of the visual field and a periphery of the visual field from the center of the lens. Having an effective aperture for including the entire subject at different distances to the unit within the depth of field, the photometric unit detects light in the visual field, and the arithmetic unit is obtained from the photometric unit. A signal-free period is calculated from the signal, and a signal is transmitted to the exposure control unit at a timing when the shutter is completely released within the period, and the exposure control unit transmits the light emitted from the screen emitted from the photometry unit. The shutter is released in synchronization with a signal corresponding to a non-existent period, and the shutter has a time for displaying one screen by line-sequential scanning or an exposure time longer than that. The fixing member includes a frame portion and an arm portion, and the fixing member has a length corresponding to a field of view of the photographing member in a region surrounded by the frame portion, and attaches the arm portion to the photographing member. A line-sequential scanning type screen photographing apparatus, characterized in that a photographing member is fixed in a direction in which an optical axis of a lens of the photographing member is perpendicular to a central portion of a visual field by bringing a frame portion into contact with a subject. 13. A lens comprising a photographing member having a lens, a shutter, photometric means, exposure control means, and arithmetic means, a fixing member, and a light-blocking member, wherein the lens has a distance from the center of the lens to a central portion of the field of view and a field of view from the center of the lens. Has an effective aperture for including the entire subject at different distances to the peripheral portion within the depth of field, and the shutter is capable of displaying one screen by line-sequential scanning or longer than that. Having an exposure time, the photometric means detects the presence or absence of light in the visual field, the computing means computes a period in which there is no luminance in the visual field from a signal obtained from the photometric means, and the shutter is completely closed during that period. A signal is transmitted to the exposure control means at a timing when the light is released, and the exposure control means synchronizes with a signal corresponding to a period during which there is no light emitted from the screen emitted from the photometry means. The light blocking member blocks light other than the light emitted from the screen out of the light incident on the field of view of the photographing member, and the fixed member has a field of view of the photographing member that is an entire screen or a partial area of the screen. It has a structure for fixing the photographing member in a direction in which the distance and the optical axis of the lens of the photographing member are perpendicular to the center of the field of view. One end is attached to the photographing member, and the other end is brought into contact with the subject. A line-sequential scanning type screen photographing apparatus, characterized in that: 14. A photographing member having a lens, a shutter, photometric means, exposure control means, and arithmetic means, a fixing member, and a light-blocking member, wherein the lens has a distance from the center of the lens to a central part of the field of view and a field of view from the center of the lens. Having an effective aperture for including the entire subject at different distances to the peripheral portion within the depth of field, the photometric unit detects the presence or absence of light in the field of view, and the arithmetic unit is a photometric unit Calculates a period during which there is no luminance in the field of view from the signal obtained from, and transmits a signal to the exposure control means at a timing when the shutter is completely released within the period, and the exposure control means emits the luminance emitted from the photometry means. The shutter is released in synchronization with a signal corresponding to a period having no image, and the shutter has an exposure time for displaying one screen by line-sequential scanning or a longer exposure time. The light blocking member blocks light other than the light emitted from the screen out of the light incident on the field of view of the photographing member, and the fixing member includes a frame portion and an arm portion, and the fixing member has an area surrounded by the frame portion. It has a length that matches the field of view of the photographing member, and the optical axis of the lens of the photographing member is perpendicular to the center of the visual field by attaching the arm to the photographing member and bringing the frame into contact with the subject. A line-sequential scanning type screen photographing apparatus characterized in that a photographing member is fixed in a direction. 15. A photographing member having a lens, a shutter, photometric means, exposure control means, and arithmetic means, and a fixed light shielding member, wherein the lens has a distance from the center of the lens to the center of the visual field and a periphery of the visual field from the center of the lens. An effective aperture for including within the depth of field the entire subject at different distances to the unit, the photometric unit detects the presence or absence of light in the field of view, and the arithmetic unit obtains from the photometric unit Calculates a period during which there is no luminance in the field of view from the obtained signal, and transmits a signal to the exposure control unit at a timing when the shutter is completely released within the period, wherein the exposure control unit has no luminance emitted from the photometric unit. Releasing a shutter in synchronism with a signal corresponding to a period, wherein the shutter has an exposure time for displaying one screen by line-sequential scanning or a longer exposure time, The fixed light shielding member has a cylindrical shape, a region surrounded by the other end has a length corresponding to the field of view of the imaging member, one end is attached to the imaging member, and the other end is brought into contact with the subject. The imaging member is fixed in a direction in which the optical axis of the lens of the imaging member is perpendicular to the center of the visual field, and light incident on the visual field of the imaging member other than that emitted from the screen is blocked. A line-sequential scanning screen imaging device.