JPH08214199A - Silver salt camkcorder - Google Patents

Abstract

PURPOSE: To allow an image pickup element to pick up a dynamic image and a still image by a silver salt film by conducting exposure control with an electronic shutter of the image pickup element and an aperture in the case of picking up a dynamic image and operating the shutter based on the exposure condition in the case of picking up a still image so as to use a lens used for a general-purpose video camera. CONSTITUTION: An optical distribution means distributes an incident light of a main lens 1 to an image pickup element and a silver salt film. The light distributed to the silver salt film is magnified by using a magnification lens 3 from an image pickup area of the main lens 1 till an image pickup area of the silver salt film (up to a size easily developed, printed and fixed in a laboratory) and exposed onto the silver salt film. An aperture 2 of the main lens 1 is used for exposure control of video image pickup. In the case of image pickup by the silver salt film, based on the proper exposure detected by video image pickup, the aperture 2 of the main lens 1 and the shutter 4 are controlled by an exposure control circuit 7 to apply proper exposure to the silver salt film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silver salt camera integrated camera capable of both moving image recording using an image pickup device and still image recording using a silver salt photosensitive material.

[0002]

2. Description of the Related Art As a known example of a silver salt camera-integrated video camera capable of both moving image recording using an image pickup device and still image recording using a silver salt photosensitive material, there is known Japanese Patent Laid-Open No. 62-107.
There is an imaging device described in Japanese Patent No. 230.

In the prior art disclosed in the above-mentioned prior application, 1
The light obtained by one shooting lens is sent to the TV camera section and the film camera section using a silver salt film, so that the TV camera shooting and the film camera shooting can be performed by one shooting lens.

Further, in the above-mentioned prior art, when shooting with a TV camera, the TV camera section behind the shooting lens shoots a moving image. However, when it is necessary to shoot a picture with the film camera section, the shooting lens is used. The optical path is bent by inserting a movable mirror that can be inserted between the TV camera section and the TV camera section. And after that, the focal length etc. is corrected by the relay lens,
The variable mirror arranged at the tip of the mirror bends the optical path again and guides it to the film camera section.

With this arrangement, it is possible to switch between TV camera shooting and film camera shooting as needed using a single shooting lens, so that moving images and still images without parallax can be obtained. Will be obtained.

As described above, the moving image of the TV camera and the high-quality still image of the film camera can be easily obtained, and the size and weight of the photographing apparatus can be reduced as compared with the case where the two photographing equipments are used for photographing. The feature is that it also has the advantage that is possible.

[0007]

As described above, in the above-mentioned prior application, a video camera (in the above-mentioned prior application, it is described as a TV camera, but the names of the constituent elements of the present invention which will be described later in detail). For the sake of convenience, hereinafter, it will be referred to as a video camera) and a silver salt camera (also described as a film camera in the above-mentioned prior application, but in the present invention, a high quality still image is taken using a silver salt film. , Which will be referred to as a “silver-salt camera” hereinafter), is described as an example in which one photographing lens is used.

However, in order for such an apparatus to be widely used by various users, it is necessary to reduce the cost of the camera itself and to realize high performance, downsizing, and improvement of usability.

To this end, a widely used high-magnification zoom lens for movies, for example, is used as a photographing lens, or a so-called laboratory where a development process of a silver salt film is processed inexpensively and easily. 35m full of
It is important to recognize the need to define basic specifications, such as using a silver salt film, and only after realizing such a configuration will a handful of users use it for business purposes. Instead, it is possible to realize an imaging device that can be widely used by general users.

However, in the prior art disclosed in the above-mentioned prior application, no consideration is given to constructing a silver salt camera integrated type video camera by making full use of such a movie lens, and it is simply a video camera. And a silver halide camera with one lens in common are only described.

The present invention has been made in view of the above points,
The purpose is to realize an image pickup device that is compatible with both moving images and still images with a small size, light weight, and low price.
To realize a silver-salt camera integrated video camera with a configuration that makes the best use of both features, for example, by commonly using an image pickup device for shooting moving images as a component necessary for exposure control. is there.

[0012]

In order to achieve the above-mentioned object, the silver salt camera-integrated video camera according to the present invention has a lens with a diaphragm (hereinafter referred to as a main lens).
And so-called 35 mm from the image pickup area of the video image pickup device
A variable-magnification lens that changes the image magnification to an image pickup area equivalent to the silver salt film image pickup area of the camera, a shutter that prevents exposure to the silver salt film except when shooting, and an exposure that controls the aperture of the main lens and controls the shutter. A control circuit and an image pickup device of a video camera and a light distribution means for distributing light on the silver salt film are provided.

[0013]

According to the present invention, the light distribution means distributes the incident light of the main lens onto the image pickup device and the silver salt film. The light distributed to the silver salt film is scaled using a variable magnification lens from the main lens shooting area to the silver salt film shooting area (up to a size that facilitates development, printing and printing in the lab), Exposure is performed on a silver salt film.

The exposure control for video shooting is performed using the diaphragm device of the main lens.

In the case of photography with a silver salt film,
Based on the proper exposure amount detected by video shooting, the aperture control device and shutter of the main lens are controlled by the exposure control means to perform proper exposure on the silver salt film.

With this structure, the video camera and the silver halide camera can be composed of one main lens with a simple structure without the need for a special exposure meter.

[0017]

The details of the present invention will be described below with reference to the illustrated embodiments.

<First Embodiment> First, a first embodiment of the present invention will be described with reference to FIG. FIG. 4 is a diagram showing the configuration of the first exemplary embodiment of the present invention.

In the figure, 1 is a main lens, and 2 is a diaphragm added to the main lens 1. For convenience of explanation, they are shown separately from the main lens 1 (this is done in each of the following embodiments). The same is true in the example). Also, 3 is a variable power lens,
4 is a shutter for controlling the exposure on the silver salt film, 6 is a silver salt film, 7 is an exposure control circuit, 8 is an image sensor, 5 is the image sensor 8 and the silver salt film 6, and the incident light from the main lens 1 is incident on the image sensor 8. A half mirror, which is a light distributing means for distributing, 81 is a camera circuit.

The light that has passed through the main lens 1 and is incident on the image pickup element 8 by the half mirror 5 is subjected to exposure control by the diaphragm 2 so that the output of the camera circuit 81 is at an appropriate level.

When a signal for photographing the silver salt film 6 is generated by a still image photographing button (not shown) during photographing of a moving image by the image pickup device 8, the output of the camera circuit 81 and the transmission coefficient of the half mirror 5 cause Since the exposure amount on the silver salt film is known, the exposure is controlled by opening / closing the shutter 4 so as to obtain a proper exposure, and a still image is taken.

Although it varies depending on the electronic shutter of the image pickup device 8, if the sensitivity of the image pickup device 8 and the value of the diaphragm 2 are known, the exposure amount on the image pickup device 8 can be known and the brightness of the subject can be detected. Therefore, the sensitivity of the silver salt film 6, the F value of the variable power lens, and the value of the shutter 2 are known in advance,
And since it can be set, if the brightness of the subject is known,
The set amount of exposure on the silver salt film 6 is obtained, and the exposure can be controlled.

As the exposure control, for example, well-known APEX (Additive System of Photographic Expos) is used.
ure) method can be easily realized. Now, when the sensitivity of the image pickup device 8 including the half mirror 5 which is the light distribution means is equivalent to 100 (SV = 5) in ISO display, the aperture 2 is adjusted so that the output of the image pickup device 8 becomes a constant value. Feedback control is performed. As a result, the electronic shutter speed is 1/60 (TV = 6) and the aperture value is F = 2.8 (A
If V = 3), the subject brightness BV is calculated by the above equation: BV = AV + TV-SV, and BV = 3 + 6-5 = 4.

Therefore, the aperture value of the silver salt film optical system including the variable magnification lens system, which is known in advance when the aperture is open, is set to, for example, F = 8 (AV = 6), and the silver including the light distribution means is included. The sensitivity of the salt film is, for example, 40 in ISO display.
When 0 (SV = 7), the TV of the shutter speed of the shutter 4 is calculated by TV = BV + SV-AV based on the subject brightness BV, and TV = 4 + 7-6 = 5, and the shutter speed is Is calculated as T = 1/30. Therefore, if the shutter 4 is controlled with this value after the aperture is opened, proper exposure can be provided on the silver salt film.

Of course, even if the aperture value in that case is set to AV and the same calculation is performed after setting the aperture value to an appropriate value and the exposure conditions are set, the appropriate exposure to the silver salt film is still obtained. It goes without saying that it is possible.

<Second Embodiment> Next, a second embodiment of the present invention will be described, in which exposure control is performed more simply. In addition,
The configuration of this embodiment is similar to that of FIG.

Now, using the electronic shutter control of the image sensor 8, for example, when a moving image is captured by controlling the aperture 2 while applying the electronic shutter at a constant speed, the image sensor determined by the electronic shutter speed of the image sensor 8. Only a certain amount of light corresponding to the amount of exposure on the image sensor 8 is incident on the image sensor 8.
As a result, only the light amount determined by the electronic shutter speed is incident on the silver salt film 6.

Therefore, a constant amount of light can be provided on the silver salt film 6 with respect to the brightness of any subject that can be controlled by the diaphragm 2.

Therefore, when the exposure control is performed by the diaphragm in moving image shooting and the silver salt film is exposed with the diaphragm value kept, the shutter 4 can be operated at a constant shutter speed to perform the exposure control with sufficient accuracy. It will be possible.

FIG. 5 shows an example of control characteristics of exposure control using this operation principle. In the figure, the vertical axis represents the aperture value of the aperture stop 2, and the aperture stop (Fopen) is used to narrow the aperture stop 2 to perform appropriate exposure on the image sensor 8. The horizontal axis represents the electronic shutter speed of the image sensor 8, which is initially fixed at the shutter speed SSc at a certain brightness of the subject, and when the brightness further increases and the aperture value reaches Fb, the shutter speed is set to SSd. Change to. Appropriate exposure control is performed by opening / closing control of the diaphragm 2.

When the subject becomes dark and the value of the diaphragm 2 drops to Fa, the shutter speed is set to SSc again.
To, and the aperture control corresponding to the change in brightness is continued. That is, exposure control with priority on shutter speed is performed.

By doing so, only the amount of light corresponding to the electronic shutter speed of the image pickup device 8 is incident on the variable power lens 3, and the shutter speed of the shutter 4 in this case is the electronic shutter speed. SSc or SSd
It is understood that it is sufficient to prepare only the shutter speed corresponding to the above, and the specification of the shutter speed required for the shutter 4 may be simple, and cost reduction can be realized.

<Third Embodiment> Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 6 shows a third embodiment of the present invention.
It is a figure which shows the structure of an Example, In this figure, the component which has the same number as FIG. 4 is equivalent to the component of the same number of FIG.

In FIG. 6, reference numeral 82 denotes an electronic viewfinder (hereinafter abbreviated as EVF), which displays a video image by a signal from the camera circuit 81 and makes it visible to the user. Reference numeral 9 denotes a total reflection mirror, which distributes light to either the image sensor 8 side or the silver salt film 6 side. Reference numeral 91 is a mirror drive circuit, which drives the total reflection mirror 9 to distribute light. That is, in this embodiment, the total reflection mirror 9 and the mirror drive circuit 91 constitute a light distribution means.

The operation of the light distributing means of this embodiment is shown in FIGS. FIG. 7 shows a case where the light from the main lens 1 is distributed to the image sensor 8 by the mirror drive circuit 91, and FIG. 8 shows the light from the main lens 1 to the variable magnification lens 3 by the mirror drive circuit 91. The case is shown.

Even in such a light distributing means, if the control method shown in the configuration example of FIG. 4 or the control having the exposure control characteristic shown in the example of FIG. The exposure control of the diaphragm 2 and the shutter 4 having the same operation and action as above can be performed.

In that case, the required specifications of the shutter 4 can be simplified, and a low-cost video camera with an integrated silver salt camera can be realized.

<Fourth Embodiment> Next, a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a fourth embodiment of the present invention.
It is a figure which shows the structure of an Example, In this figure, the component which has the same number as FIG. 6 is equivalent to the component of the same number of FIG.

In FIG. 1, reference numeral 92 denotes an image pickup element moving circuit which is a part of the light distribution means, and when the image pickup element 8 is moved in and out of the optical path of the main lens 1, the image pickup element 8 side or
Light is distributed to the silver salt film 6 side.

The present embodiment is different from the embodiments of FIGS. 4 and 6 in that light distribution is realized by the image pickup device moving circuit 92 and the image pickup device moving mechanism (not shown). That is, in the case of video shooting, shooting is performed by pushing the image pickup element 8 toward the image forming surface of the main lens 1, and in the case of silver halide camera shooting, the image pickup element 8 is removed from the optical path of the main lens 1. The structure is characterized in that the incident light of the main lens 1 can be distributed to the silver salt film 6 side and the silver salt film photography is performed.

This operation is shown in FIGS. 2 shows the case of video shooting, and FIG. 3 shows the case of silver salt film shooting.

Even in such a light distributing means, if the exposure control shown in FIG. 4 or the exposure control characteristic shown in FIG. 5 is provided, the operation and action explained in the above-mentioned embodiment in video shooting and still image shooting. Similarly, the exposure control of the diaphragm 2 and the shutter 4 is possible.

Therefore, since the specifications required for the shutter 4 are simple, the silver salt camera-integrated video camera can be constructed at low cost.

<Fifth Embodiment> Next, a fifth embodiment of the present invention will be described with reference to FIGS. FIG. 9 is a diagram showing the configuration of the fifth embodiment of the present invention. In FIG. 9, the components having the same numbers as in FIG. 1 are equivalent to the components having the same numbers in FIG.

In FIG. 9, reference numeral 93 denotes an image pickup element rotating circuit which is a part of the light distribution means, and the image pickup element 8 is moved in and out of the optical path of the main lens 1 so that the image pickup element 8 side or
Light is distributed to the silver salt film 6 side.

The present embodiment is different from the embodiment of FIG. 1 in that light distribution is realized by the image pickup element rotating circuit 93. That is, in the case of video shooting, shooting is performed by rotating the image sensor 8 and inserting it into the image forming surface of the main lens 1, and in the case of silver halide camera shooting, rotating the image sensor 8 It is characterized in that the incident light of the main lens 1 can be distributed to the silver salt film 6 side by removing it from the optical path of the main lens 1, and the silver salt film photography is performed.

This operation will be described with reference to FIGS. In both figures, reference numeral 94 denotes an image pickup element rotation mechanism, which is based on drive control by the image pickup element rotation circuit 93.
Is inserted into the image forming position of the main lens 1 while rotating, or the image pickup element 8 is separated from the optical path of the main lens 1 while rotating.

FIG. 10 shows a case of video shooting in which the image pickup device 8 is inserted into the image forming position of the main lens 1 based on the drive input of the image pickup device rotation circuit 93, and FIG. It shows a case of silver halide film photography in which the film is removed from the imaging position.

Since the light distributing means according to this embodiment only rotates about one axis, the structure and movement itself are simple if the precision of the stopper that determines the stop position of rotation is increased. A durable and inexpensive mechanism can be constructed.

Needless to say, if the exposure control illustrated in FIGS. 4 and 5 is performed, the exposure control can be performed with high precision and the specifications required for the shutter 4 can be simplified. .

<Sixth Embodiment> A sixth embodiment of the present invention will be described with reference to FIG. FIG. 12 is a diagram showing the configuration of the sixth embodiment of the present invention. In FIG. 12, the components having the same numbers as the components in FIG. 1 are equivalent to the components having the same numbers in FIG. .

In FIG. 12, 71 is a strobe,
It is controlled by the exposure control circuit 7. Here, the strobe 71 is, for example, a so-called auto strobe, which measures the reflected light of the emitted light by the exposure control means itself incorporated in the strobe and stops the light emission when a total amount of the measured reflected light is obtained. And

When exposure is performed by using such an automatic strobe, there is no need to perform real-time photometric control to be incorporated in the exposure control circuit 7, and the operation of the exposure control circuit itself becomes simple.

In the control operation in this case, first, the diaphragm 2 is adjusted to the exposure condition by the auto strobe, the light of the main lens 1 is guided to the variable power lens 3 by the light distributing means, the shutter 4 is opened, and then the auto strobe is turned on. To operate. Then, the shutter 4 is closed and the exposure on the silver salt film 6 is completed. This is, of course, because it is necessary to continue opening the shutter 4 during the light emission in order to perform all exposure by the light emitted by the strobe light.

<Seventh Embodiment> Next, a seventh embodiment of the present invention will be described with reference to FIG. FIG. 13 is a diagram showing the configuration of the seventh embodiment of the present invention. In FIG. 13, the components having the same numbers as the components in FIG. 12 are equivalent to the components having the same numbers in FIG. is there.

In FIG. 13, a DX code reading circuit 61 reads the DX code (film sensitivity information) written on the outside of the cartridge loaded with the silver salt film 6. 83 is a display circuit, and in this example, E
The data and the like are displayed on the VF 82 to notify the warning and the like.

Now, when the video camera and the silver salt film camera are integrated, the equivalent magnification of the variable magnification lens 3 which is usually produced by expanding from the size of the image pickup area of the image pickup device 8 to the size of the image pickup area of the silver salt film. The amount of light radiated on the silver salt film 6 becomes small due to such a decrease in F value. Therefore, the exposure time on the silver salt film tends to be long. Therefore, although it is convenient to use a high-sensitivity film as the silver salt film, the user may load a film having various sensitivities as in a normal dedicated silver salt camera.

Therefore, when the camera of the present invention is loaded with an unusable film because the sensitivity of the silver salt film is too low,
It is necessary to warn the user of this. Therefore, the exposure control circuit 7 determines whether or not the loaded film is usable based on the read data of the DX code reading circuit 61, and displays it on the display circuit 83.

Even if the film has sufficient sensitivity and can be used, if the ISO sensitivity, that is, the SV, which is the film sensitivity, is changed, the exposure condition described in FIG. It is necessary to change the exposure condition because it is necessary to determine with a new SV value.

Therefore, for example, when moving images are controlled by giving priority to the shutter speed as shown in FIG. 5 and silver halide film photography is performed, in order to perform exposure without changing the shutter speed that can be set by the shutter 4, It is necessary to change the electronic shutter speeds SSc and SSd of the image sensor 8 to match the sensitivity change of the silver salt film 6.

That is, the SV of the silver salt film is +1 EV
(Exposure Value; exposure value, 1EV corresponds to 6dB) is increased (for example, replaced from ISO400 film to ISO800 film), and the DX code reading circuit 61
In order to maintain the same shutter speed, the light amount incident on the variable power lens 3 needs to be changed by -1 EV to reduce the light amount. For that purpose, it is necessary to improve the sensitivity of the image sensor 8 by 1 EV and reduce the amount of light transmitted by the diaphragm 2 by -1 EV. Therefore, the electronic shutter speed of the image sensor 8 may be reduced by +1 EV (for example, SSc = 1/250 to 1/125). The same applies to SSd.

Although the case where the film sensitivity of the silver salt film 6 is improved has been described above, the case where the sensitivity is decreased can be dealt with in the same manner. Further, in the present example, this is dealt with by changing the shutter speed of the image sensor 8, but it goes without saying that the same effect can be obtained even if the setting of the amplification degree of the camera circuit 81 is changed.

Although the operation of the strobe 71 has been described with reference to FIG. 12, it goes without saying that the exposure condition by the strobe 71 also needs to be changed in accordance with the change in film sensitivity.

In the case of strobe exposure, as is well known, in realizing light emission control, there are some light emission amounts that can be actually controlled because of the light emission characteristics of the light emitting section and the characteristics of the control circuit. The light emission control condition corresponding to the aperture can be set.

This also applies to a video camera integrated with a silver salt camera, the setting of the aperture 2 is changed according to the film sensitivity from the DX code reading circuit 61, and
It goes without saying that the setting of the diaphragm 2 and the light emission control condition of the strobe 71 are changed according to the zoom value of the main lens 1.

The above is premised on input from a switch (not shown) for inputting an instruction to use a strobe,
Although the strobe shooting operation has been described, it is necessary to perform strobe shooting based on the image signal output of the image sensor 8 and the value of the aperture 2 when a silver salt film shooting instruction is issued during movie shooting. Needless to say, even if it is determined that there is such a situation, the control of the strobe described above may be performed.

In the case of stroboscopic photography, the aperture value is used as a set value, but stroboscopic photography usually occurs when the illuminance of the subject is low, so the aperture is often open during movie shooting.

Therefore, in the flash emission control conditions,
Including the light emission control when the aperture is open is effective in increasing the operation start speed of shooting with a silver salt film camera.

<Eighth Embodiment> Next, an eighth embodiment of the present invention will be described with reference to FIG. FIG. 14 is a diagram showing the configuration of the eighth embodiment of the present invention, in which the components having the same numbers as the components in FIG. 13 are equivalent to the components having the same numbers in FIG. is there.

In FIG. 14, reference numeral 72 is a photometric circuit,
For example, a subject image formed by the light emitted from the strobe 71 is formed on the silver salt film 6 via the main lens 1, and the reflected light of the image is integrated to measure the amount of light emitted from the strobe 71.

The exposure control circuit 7 controls the light emission period of the strobe 71 by the output of the photometry circuit 72. That is, if the output of the photometric circuit 72 from the start of the light emission of the strobe 71 is observed and it is determined that a constant light emission amount is obtained,
Immediately cut off the light emission of the strobe 71 and end the exposure,
The exposure control is performed by so-called TTL direct photometry.

In such exposure, there is a feature that the exposure control by the mixed light of the external light and the strobe light can be relatively easy, and the usability is further improved.

In the present invention, the image pickup device 8 may be used in place of the photometry circuit 72 to perform strobe exposure control by TTL photometry.

An example of this case will be described with reference to FIG. In the configuration shown in FIG. 4, light from the subject is always incident on the image sensor 8 and the silver salt film 6 when the shutter 4 is opened. Therefore, after the shutter 4 is opened, if a strobe (not shown) emits light, it is exposed to the silver salt film 6 and at the same time, is exposed to the image sensor 8.

By the way, when the image signal of the image pickup device 8 is generated, one of the charges pair-generated by photoelectric conversion is accumulated on the picture element of the image pickup device, and the charge is read out by the image pickup device. It is read out and becomes a video signal.
The other charge is discharged in real time through the well of the image pickup device at the same time as the pair is generated. Therefore, if the discharged charges are detected and the integrated amount thereof is obtained, the incident light from the strobe can be detected in real time.

Since this detected value is equivalent to the output of the photometry circuit 72 in FIG. 14, the exposure control circuit 7 can control the start and cutoff of strobe light emission, and the TTL by the image pickup device 8.
Direct metering is possible.

<Ninth Embodiment> Next, a ninth embodiment of the present invention will be described with reference to FIG. FIG. 15 is a diagram showing the configuration of the ninth embodiment of the present invention. In FIG. 15, the components having the same numbers as the components in FIG. 14 are equivalent to the components having the same numbers in FIG. is there.

In FIG. 15, reference numeral 62 denotes a winding mechanism for the silver salt film 62, which has not been illustrated and described up to this example. Each time the silver salt film 6 is exposed, the film is wound in preparation for the next exposure. To do. Reference numeral 63 is a recording head for recording photographing data and the like on a magnetic recording portion (not shown) of the silver salt film 6. Reference numeral 64 denotes a recording circuit, which records the photographing data and the like from the exposure control circuit 7 through the recording head 63.

The magnetic recording portion of the silver salt film 6 can be obtained by applying a magnetic recording medium on a part of the film or by applying a transparent magnetic recording medium on the entire surface.

Photographing data includes, for example, normal exposure conditions such as date and time and aperture value, as well as on the silver salt film 6 by the variable magnification lens 3 for indicating a photographed size required for printing in a laboratory. Record the magnification, the distinction of the imaging area for panoramic shooting, and high-definition shooting.

Further, if necessary, GPS (Global Pos) using radio waves from an artificial satellite whose position on the earth is known.
itioning System), after obtaining the position information at the time of shooting,
It goes without saying that it may be written as data.

<Tenth Embodiment> Next, a tenth embodiment of the present invention will be described with reference to FIG. FIG. 16 is a diagram showing the configuration of the tenth embodiment of the present invention, in which FIG.
The components having the same numbers as the components of 5 are equivalent to the components having the same numbers in FIG.

In FIG. 16, 86 is a recording medium, and 85 is a recording head for recording on the recording medium 86. Further, in the camera circuit 81, reference numeral 812 denotes a still image processing circuit that performs signal processing for still image recording from the output of the image pickup element 8, 813.
Is a moving image processing circuit that performs signal processing for recording a moving image from the output of the image sensor 8, and generates a video signal. A recording circuit 84 is a circuit for recording the still image signal of the still image processing circuit 812 and the moving image signal of the moving image processing circuit 813 on the recording medium 86 using the recording head 85.

As an example of the recording medium 86, there is a magnetic tape used in so-called 8 mm video. In this case, a rotary head is used as the recording head 85 for recording moving images, and video signals are analog-recorded. In addition, as a still image recording, a so-called PCM (Pulse Code Modul) of 8 mm video is used.
If the still image data is recorded in the data recording area of (ation), the moving image signal and the still image signal can be simultaneously recorded.

In this case, it goes without saying that the still picture signal may be recorded one shot at a time in sequence or in response to the operation of a still picture recording switch (not shown).

What is important in this embodiment is that while recording a moving image and a high-quality still image with an electric signal, a still image with a higher-quality silver salt film can be chemically recorded, if necessary. .

Further, the magnetic tape is used as the recording medium for the video signal, and the analog recording is used as the moving image recording method.
Of course, the present invention is not limited to this, and a moving image signal may be converted into digital data and digitally recorded. Furthermore, it goes without saying that compression can be performed for longer recording, or that an individual memory such as a flash memory can be used instead of the magnetic tape.

Further, although the variable power of the variable power lens 3 and the like have not been described in detail, the size of the image pickup area of the image pickup device 8 (in the case of the 1/2 inch sensor, the length × width is about 4.8 m
m × 6.4 mm), for example, is called a Leica plate 35
24m, which is the standard image size for millimeter film cameras
It may be enlarged to a size of m × 36 mm. In this case, the aspect ratio of the imaging area of the image sensor 8 is 3: 4, and that of the 35 mm film camera is 2: 3 (= 3: 4.5), and it is not possible to set the same vertical and horizontal angle of view. It is possible. However, by setting the angle of view to be similar, the EV
The screen displayed in F82 and the screen where the silver salt film 6 is developed and printed can be set to be substantially the same. Further, in this case, it goes without saying that the angle of view may be set in consideration of the cut-out portions at the four corners when printed out, that is, the portion corresponding to so-called overscan of the monitor. Furthermore, if the horizontal is the same angle of view, 3
Since the length becomes narrower with a 5 mm film, the display of the narrowed portion may be displayed as a shooting image frame display on the EVF 82. In this case, by half-pressing the silver halide film shooting switch (not shown), the display is made on the EVF. Needless to say, it may be configured to display the intention as a camera such as.

Further, there are various setting methods for the scaling ratio. For example, the size of the exposed area of the 35 mm film is set to the magnification of the variable magnification system as the size for exposure of the size reduced to 1/2 in the length direction so that two images can be taken within the standard size. Of course, in this case, it goes without saying that the film winding mechanism 62 is configured to correspond thereto.

Further, as the image pickup size, in addition to the two-shot image pickup, a multi-shot image pickup such as three or four image pickup may be performed. In that case, even if the film winding and moving mechanism is configured so that the film can be photographed in a horizontal row within the standard size when the film is wound in accordance with the film winding mechanism 62, it can be photographed vertically and horizontally without a gap. It goes without saying that a so-called panorama size other than the standard size, a high-definition size, a reduced size thereof, or the like may be realized.

In each of the embodiments described above, the main lens 1 has been described based on the video lens, but it is needless to say that the main lens 1 is not limited to this. For example, for a silver salt film camera. It goes without saying that a lens may be used. In this case, in the video lens, the example in which the aperture is controlled to prioritize the electronic shutter speed to shoot a moving image is shown. However, even when the silver halide film camera lens can only take discrete aperture values, the same control is performed. Is possible. That is, after fixing the aperture value to the closest aperture value to be controlled, the exposure control of the moving image is controlled by the electronic shutter, and it is possible to control as if the shutter priority exposure control is performed. It is possible to control the exposure of the moving image optimally even with the brightness of the subject.

With such control, when the shutter speed of the shutter 4 with respect to the silver salt film remains constant, the electronic shutter speed of the image pickup device 1 may slightly deviate from the value originally set. It is easily expected that the exposure accuracy will decrease. However, since the latitude of the silver salt film is sufficiently high, the subject image will not be saturated on the silver salt film as with movie shooting even with a slight exposure error, and even a slight exposure error will occur at the photo lab. There is no problem because it can be corrected.

Of course, the aperture value of the main lens 1 is set to a constant value in advance, the exposure control of the moving image is performed by the electronic shutter, and the exposure to the silver salt film is performed by changing the aperture 2 and the shutter 4 of the main lens 1. It goes without saying that it is okay.

Further, when the aperture 2 is changed in shooting a moving image, the electronic shutter speed can be rapidly changed so as to correct a sudden change in the exposure amount due to the change, and the image disturbance due to the change can be prevented.

The shutter 4 for exposing the silver salt film is also provided.
However, it goes without saying that it is not necessary to provide it exclusively. For example, since the light is not incident on the silver salt film 6 by driving the mirror 9 in FIG. 6, this may be used instead of the shutter 4, or the image sensor element in FIGS. Image pickup element rotating mechanism 94 operated by the moving circuit 93
Needless to say, the shutter 4 can be used instead of the shutter 4.

<Eleventh Embodiment> Next, in addition to the above,
An eleventh embodiment of the present invention will be described with reference to FIG. 17, in which the shutter 4 dedicated to exposing the silver salt film can be removed. FIG. 17 is a diagram showing the configuration of the eleventh embodiment of the present invention, in which the components having the same numbers as in FIG. 16 are equivalent to the components having the same numbers in FIG.

In FIG. 17, reference numeral 95 denotes a shutter / image pickup element moving circuit which also serves as a shutter drive source, and a light distributing means having a shutter function of irradiating the silver salt film 6 with light for a certain period of time by moving the image pickup element 8. Has become a part of.

This shutter / imaging element moving circuit 95 eliminates the need for the shutter of the variable power lens 3 and enables cost reduction.

By the way, when the operation is changed from the moving image shooting mode to the still image shooting mode and then to the moving image shooting mode again, the still image shooting does not cause light to be incident on the image pickup device 8 under the exposure conditions of the moving image shooting thus far. Therefore, there is a case where the exposure control loop is once opened to shift to the moving image shooting mode, and in this case, the screen may be disturbed. Therefore, in this embodiment, a setting storage circuit 72 is provided for temporarily storing exposure conditions such as the electronic shutter speed immediately before shifting to the still image shooting mode. This setting storage circuit 72
By storing the temporary exposure condition in the and storing the temporary exposure condition and starting the moving image shooting, it is possible to maintain the image without the disturbance in the video signal even after the still image shooting is finished.

Of course, if a moving image immediately before still image shooting is recorded in the memory setting circuit 72 and the image is output while still image shooting is performed, moving image shooting with further disturbance prevention is possible. Become. This operation can be realized by connecting the setting storage circuit 72 and the camera circuit 81 and providing the setting storage circuit 72 with an image memory as shown in FIG.

Although the details of the still image processing circuit 812 are not described, generally, a memory for still image processing is required for still image processing, and the image memory is used. The image memory in 812 may be configured to suddenly input the output of the image pickup device 8 at the time of switching to filming of a silver salt film and output this image signal.

Further, in the embodiment of FIG. 15, an example in which the photographing conditions and the like are magnetically recorded on the silver salt film 6 by the recording head 63 has been described, but of course the invention is not limited to the magnetic recording.

In FIG. 17, reference numeral 65 denotes an imprinting head, which imprints data such as photographing conditions on the silver salt film 6 by light based on the recording signal of the recording data of the recording circuit 64. By using the imprinting head 65 to imprint data such as a shooting location and a shooting date on a part of the silver salt film 6, it can be immediately confirmed on the print even after the silver salt film 6 is developed. It will be convenient for organizing.

It should be noted that the data such as the magnification of the variable power lens 3 and the distinction of the image pickup area may be imprinted on a place other than the place to be printed, and the data may be detected at the developing place and used at the time of printing. There is no end.

Furthermore, although it has been described that the main lens 1 may be a lens for a silver salt film camera, in that case, it is easy to deal with an interchangeable lens. In other words, when explaining the exposure control operation in the case of lenses for silver halide film cameras, it was stated that the discrete movement of the diaphragm is not a problem. This is the case when realizing an interchangeable lens with a general lens exchange mount. However, the aperture control is performed from the camera body side, and this can be used.

Reference numeral 11 in FIG. 17 is a mount for an interchangeable lens, and schematically shows that the drive system for driving the diaphragm 2 and the focusing lens of the main lens 1 is controlled through this mount 11. is there.

Furthermore, in the present invention, since a moving image can be photographed by the image pickup device 8, a so-called video autofocus, which is feedback control so that the contour component of the video signal of the image pickup device 8 is maximized, is performed as the focus adjustment. Needless to say, it is suitable.

In FIG. 17, reference numeral 12 denotes an automatic focusing circuit which automatically adjusts the focus of the main lens 1 so that the high frequency component is maximized by using the video signal. The focusing operation is once stopped in the case of silver halide film photography, and the focusing operation is restarted when the moving picture photography is started again.

The diaphragm 2 and the focus are adjusted by the mount 11
As long as the specifications of this control and electrical connection are satisfied, the interchangeable lens can be easily realized.

In FIG. 5, when the illuminance of the subject is increased, it is described that the electronic shutter speed of the image sensor 8 is increased and the required specifications of the shutter 4 are simple. However, the principle of such control is described. It will be described below that even if it is out of the range, it will be sufficiently practical.

For example, when the illuminance of the subject increases, the lens 1
If the aperture value becomes extremely large and becomes a small aperture (a state in which the aperture diameter of the aperture is small), the object is blurred due to the diffraction of light by the small aperture. In this case, it is necessary to increase the electronic shutter speed and increase the diameter of the diaphragm. However, in order to perform the control described in FIG. 5, it is necessary to change and add the shutter speed of the shutter 4, which is a mechanical shutter, according to the shutter speed. However, this is contrary to the construction of an inexpensive camera which was the subject of the present invention.

Therefore, the electronic shutter speed is increased only when shooting a moving image, and the original image is exposed when shooting a still image. The overexposure that occurs here is corrected at the photo lab.
Since it is possible to obtain a practically sufficient image, there is no problem.

Then, by storing the data for changing the exposure control in the control characteristic changing data shown by 73 in FIG. 17 and using it as necessary, a more convenient photographing device can be realized. .

<Twelfth and Thirteenth Embodiments> Here, in each of the above embodiments, the silver salt film 6 and the image pickup device 8 are used.
As for the arrangement and the like, an example of arranging as shown in FIG. 1 and FIG. 4 has been described, but it goes without saying that the application is not limited to this arrangement, and is shown as a twelfth embodiment of the present invention. 18
And FIG. 19 shows a thirteenth embodiment of the present invention. 18 and 19, components having the same numbers as those in FIG. 17 are equivalent to the components having the same numbers in FIG.

In FIGS. 18 and 19, reference numeral 91 is a movable mirror, and by moving this, a silver salt film 6 is formed.
Alternatively, the light is distributed to each of the image pickup elements 8. Reference numeral 92 denotes a reflection mirror, which has a function of sending the light of the variable power lens 3 to the image sensor 8 or the silver salt film 6 to form an image. The line shown by the broken line in the drawing schematically represents the optical path, and is branched and shown by the movable mirror 91 for convenience of explanation. Note that FIG. 18 and FIG.
9 shows an example in which the movable mirror 91 is used instead of the shutter and the shutter 4 is omitted.

As described above, the optical path and the arrangement of the constituent elements can be freely set by using a mirror or the like, but it goes without saying that the control method and the like described in the present invention can be applied to any case. A video camera with a built-in silver-salt camera with high accuracy can be configured.

[0117]

As described above, according to the present invention, a silver salt for performing moving image shooting using an image pickup device and still image shooting using a silver salt film, using a lens used in a general-purpose video camera. A video camera with a built-in camera can be realized at a small size and at low cost.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of a silver salt camera integrated type video camera according to a fourth embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an operation according to a fourth embodiment of the present invention.

FIG. 3 is an explanatory diagram showing an operation according to a fourth embodiment of the present invention.

FIG. 4 is an explanatory diagram showing the configuration of a silver salt camera-integrated video camera according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram showing an example of exposure control characteristics of a silver salt camera-integrated video camera according to a second embodiment of the present invention.

FIG. 6 is an explanatory diagram showing the configuration of a silver salt camera-integrated video camera according to a third embodiment of the present invention.

FIG. 7 is an explanatory diagram showing an operation according to the third embodiment of the present invention.

FIG. 8 is an explanatory diagram showing an operation according to the third embodiment of the present invention.

FIG. 9 is an explanatory diagram showing the configuration of a silver salt camera-integrated video camera according to a fifth embodiment of the present invention.

FIG. 10 is an explanatory diagram showing an operation according to the fifth embodiment of the present invention.

FIG. 11 is an explanatory diagram showing an operation according to the fifth embodiment of the present invention.

FIG. 12 is an explanatory diagram showing a configuration of a silver salt camera-integrated video camera according to a sixth embodiment of the present invention.

FIG. 13 is an explanatory diagram showing a configuration of a silver salt camera-integrated video camera according to a seventh embodiment of the present invention.

FIG. 14 is an explanatory diagram showing the configuration of a silver salt camera-integrated video camera according to an eighth embodiment of the present invention.

FIG. 15 is an explanatory diagram showing a configuration of a silver salt camera-integrated video camera according to a ninth embodiment of the present invention.

FIG. 16 is an explanatory diagram showing a configuration of a silver salt camera-integrated video camera according to a tenth embodiment of the present invention.

FIG. 17 is an explanatory diagram showing the configuration of a silver salt camera-integrated video camera according to an eleventh embodiment of the present invention.

FIG. 18 is an explanatory diagram showing a configuration of a main part of a silver salt camera-integrated video camera according to a twelfth embodiment of the present invention.

FIG. 19 is an explanatory diagram showing a structure of a main part of a silver salt camera-integrated video camera according to a thirteenth embodiment of the present invention.

[Explanation of symbols]

 1 Main Lens 2 Aperture 3 Variable Lens 4 Shutter 5 Half Mirror 6 Silver Salt Film 7 Exposure Control Circuit 8 Image Sensor 9 Total Reflection Mirror 61 DX Code Reading Circuit 62 Winding Mechanism 63 Recording Head 64 Recording Circuit 71 Strobe 72 Setting Memory Circuit 73 Control characteristic change data 81 Camera circuit 82 EVF (electronic viewfinder) 83 Display circuit 84 Recording circuit 85 Recording head 86 Recording medium 91 Mirror drive circuit 92 Image sensor moving circuit 93 Image sensor rotating circuit 94 Image sensor rotating mechanism 95 Shutter Dual-purpose image sensor moving circuit 812 Still image processing circuit 813 Video processing circuit

Claims (7)

[Claims] 1. A moving image shooting apparatus comprising: a shooting lens, an image sensor, and a silver salt film, and reading out image information photoelectrically converted by forming an image on the image sensor using the shooting lens.
In a video camera integrated with a silver salt camera that forms a still image by forming a photochemical reaction on the silver salt film by using the shooting lens, a shooting image obtained by the shooting lens is captured on the silver salt film. A variable magnification lens for changing the magnification and re-imaging the image, an aperture added to the photographing lens, a shutter for shielding the silver salt film, and an incident light of the photographing lens is distributed to the image sensor and the silver salt film. And a light exposure control circuit that controls the aperture and the shutter according to the amount of light incident on the image sensor. 2. The electronic device according to claim 1, wherein the image sensor has an electronic shutter function, the electronic shutter is operated during moving image shooting, and exposure control is performed by the diaphragm, and the shutter is used during still image shooting. A video camera with a built-in silver salt camera, which operates according to the speed. 3. The silver salt camera integrated video camera according to claim 2, wherein when the aperture value reaches a first threshold value, the electronic shutter speed is changed to a second value. 4. The size according to claim 1, wherein the size of the first image-capturing surface formed by the image-capturing lens on the image-capturing element and the second image-capturing image formed by the variable-magnification lens on the silver salt film. The size of the surface, the silver salt having the variable magnification lens for forming an image so that the length in the lengthwise direction of the size of the second photographing surface is smaller than the width of the silver salt film. Video camera with integrated camera. 5. A moving image shooting comprising: a shooting lens, an image sensor, and a silver salt film, and reading out image information photoelectrically converted by forming an image on the image sensor using the shooting lens.
In a video camera integrated with a silver salt camera which forms an image on the silver salt film using the shooting lens to obtain an image by a photochemical reaction, a video image obtained by the shooting lens is provided on the silver salt film. A variable magnification lens for changing the magnification and re-imaging the image, a reading unit for reading the sensitivity of the silver salt film, an aperture added to the photographing lens, a shutter for shielding the silver salt film, the image sensor and the Distributing means for distributing the incident light of the taking lens to a silver salt film, and changing the sensitivity to the image pickup device according to the reading value of the reading device, the shutter and the shutter depending on the amount of light incident on the image pickup device. A video camera integrated with a silver salt camera, comprising an exposure control circuit for controlling. 6. The silver according to claim 5, wherein the image sensor has an electronic shutter function, and a change in sensitivity to the image sensor is realized by changing a shutter speed of the electronic shutter function. A video camera with an integrated salt camera. 7. The signal processing circuit according to claim 5, further comprising a signal processing circuit that converts the photoelectrically converted image information of the image pickup device into a moving image signal, and the sensitivity of the image pickup device is changed by amplification of the signal processing circuit. A video camera with a built-in silver salt camera, which is realized by changing the setting of the degree.