JPH0784312A - Still camera integrated video camera - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the space factor and obtain a still camera integrated video camera with excellent portability. [Structure] A first photographing lens group that transmits photographing light, and a first photographing lens group.
A reflecting surface disposed behind the photographing lens group and reflecting the photographing light transmitted through the first photographing lens group to the outside of the optical path to form an image forming surface; and a reflecting surface arranged on the image forming surface formed by the reflecting surface. One image pickup means, a second image pickup lens group forming an image formation surface of the photographing light transmitted through the first image pickup lens group, and a second image pickup means arranged on the image formation surface formed by the second image pickup lens group. To have.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a still camera integrated video camera in which a still camera and a video camera are integrated.

[0002]

2. Description of the Related Art Generally, the screen size of an image pickup element of a video camera is smaller than the image pickup screen size of a 35 mm film. Therefore, a still camera integrated type video in which a conventional still camera of this type and a video camera are integrated. In order to make the angle of view the same, the camera has independent photographing optical systems with different image magnifications (JP-A-63-25774).
(See Japanese Patent Publication No. 1).

[0003]

If the photographing optical systems having different image magnifications are independently provided like the conventional still camera integrated type video camera, the space factor is deteriorated, and the still camera integrated type video camera is portable. There is a problem that damages.

The present invention has been made in view of the above problems, and an object thereof is to obtain a still camera-integrated video camera having an improved space factor and excellent portability.

[0005]

In order to achieve this object, a video camera integrated with a still camera according to the present invention comprises:
A first photographing lens group that transmits photographing light; and a reflecting surface that is disposed behind the first photographing lens group and that reflects the photographing light that has passed through the first photographing lens group to the outside of the optical path to form an image plane. A first image pickup means arranged on the image forming surface formed by the reflecting surface, a second image pickup lens group forming an image forming surface of the image pickup light transmitted through the first image pickup lens group, and a second image pickup lens group. It is configured to include a second image pickup unit arranged on the image forming plane to be formed.

[0006]

In the still camera-integrated type video camera having the above-mentioned structure, since the photographing lens group is used for both the video camera and the still camera, as compared with the case where the still camera and the video camera are independent, By improving the space factor, it becomes possible to obtain a still camera integrated video camera with excellent portability.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an embodiment of a video camera integrated with a still camera according to the present invention.

In FIG. 1, reference numeral 1 denotes a first photographing lens group which constitutes a convergent lens system as a whole and is held by a lens frame 9. A male screw 9 a is formed on the outer periphery of the lens frame 9 and is screwed with a female screw 11 a of the focusing frame 11. A diaphragm 7 and a diaphragm mechanism 12 are arranged around the focusing frame 11. The diaphragm mechanism unit 12 is
A driving device (not shown) for the focusing drive ring 10 that rotates around the optical axis of the taking lens group 1 is held.

A reflecting surface 3 is arranged behind the taking lens group 1. The reflecting surface 3 is composed of a total reflection mirror or a semi-transmissive reflection mirror. In the case of the total reflection mirror, at the time of filming a silver salt film, the exposure operation is performed after flipping up by means not shown. The photographic image that the photographic lens group 1 converges to the CCD
Reflect toward 5. As a result, the first on the CCD5
The image plane of is formed. Behind the reflecting surface 3, a second taking lens group 4 which constitutes a diffusing lens system as a whole is arranged. The taking lens group 4 cooperates with the taking lens group 1 to form a second image plane on the silver salt film 6. A shutter 8 exposes the silver salt film 6 for a predetermined time.

A feed screw 19a is inserted through the lens frame 19 which holds the photographing lens group 4, and the feed screw 19a is rotationally driven by a motor 19b. When the feed screw 19a rotates, the taking lens group 4 reciprocates in the optical axis direction. Thereby, the movement of the image plane accompanying the focusing operation of the photographing lens group 1 is corrected. The correction of the image plane movement due to the movement of the photographing lens group 4 is performed before the opening operation of the shutter 8. Further, the rotation amount of the feed screw 19a is detected by the combination of the slit 19d directly connected to the motor shaft 19c and the photo interrupter 13, and thus the movement amount of the photographing lens group 4 is detected.

As shown in FIG. 2, the screen size (h ₁ ) of the image sensor (CCD 5) of the video camera is smaller than the screen size (h ₂ ) of the 35 mm film. Since the photographic lens group 4 forming the image plane of the photographic light transmitted through 1 is provided,
The image magnification β ₁ on the first image plane (see FIG. 2A) and the second
The relationship with the image magnification β ₂ on the image plane (see FIG. 2B) is
β ₁ <β ₂ . That is, it becomes possible to use the photographing lens group 1 for the video camera as the one for the silver salt film.

3 and 4 are side views showing a second embodiment of a still camera-integrated video camera according to the present invention. In the figure, the same components as those in FIGS. 1 to 3 are designated by the same reference numerals, and a duplicate description will be omitted. In this embodiment, the first taking lens unit is composed of a variable power lens (zoom lens).

In FIGS. 3 and 4, reference numeral 15 is a straight guide cylinder, and 14 is a cam cylinder. When the cam barrel 14 rotates, a cam surface (not shown) formed on the cam barrel 14 moves the lens groups 21 and 22 back and forth while changing the distance in the optical axis direction. In FIG. 3, the lens groups 21 and 22 are set to Wi.
4 shows a state in which the lens groups 21 and 22 have been moved to the Tele (telephoto) side. Other than that, the configuration is the same as that of FIGS. 1 to 3, and duplicate description is omitted.

Next, the operation will be described. FIG. 5 is a block connection diagram showing the circuit configuration of the camera. 6 and 7 show operation flowcharts. Note that FIG.
~ FIG. 7 is common to the 1st Example and 2nd Example mentioned above.

In FIG. 6, in step S1, it is determined whether or not the power switch SW1 (FIG. 5) is on, and after waiting for the power switch SW1 to be on, step S2.
Proceed to. In step S2, the light metering means 22a (FIG. 5) is used to perform light metering, the proper exposure is calculated, and then the diaphragm mechanism section 12 (diaphragm control means 12 in FIG. 5) sets the diaphragm 7 in an appropriate state. In step S4, the distance measuring means 21
Distance measurement is performed using b, and in step S5, the first focusing unit 25 moves the taking lens group 1 to a predetermined position,
The CCD 5 is set to be in focus. Step S
In 6, the white balance sensor 26 adjusts the white balance. In step S7, the video circuit 31 is driven to display the captured image on the viewfinder 32.

In step S8, in the case of the second embodiment,
When it is recognized that the zoom-up switch SW2 is turned on, the lens groups 21 and 22 are zoom-up driven, and the zoom-up drive is stopped when the zoom-up switch SW2 is turned off.

In step S9, in the case of the second embodiment,
When it is recognized that the zoom down switch SW3 is turned on, the lens groups 21 and 22 are zoomed down, and when the zoom down switch SW3 is turned off, the zoom down driving is stopped.

In step S10, when it is recognized that the silver salt film photographing release switch SW4 is turned on, the process shown in FIG. 7 described below is started.

In FIG. 7, the film sensitivity is read in step S101, the amount of light reduction due to the half mirror (reflection surface 3) is corrected from the current aperture value and the photometric value in step S102, and the appropriate shutter speed is calculated (step). S1
02). In the case of a shutter speed that may cause camera shake from the calculated shutter speed (step S103), it is determined that the flash light emission mode is set and the flag F =
1 is set (step S104).

Next, when the reflecting surface 3 is a total reflection mirror, the mirror is raised in step S105. After the mirror is raised, the second focusing drive is performed (step S106), and the photographing lens group 4 is moved to an appropriate position so that the light flux passing through the photographing lens group 1 forms an image on the silver salt film 6.
In step S107, shutter control is started at the shutter speed previously obtained. In step S108, it is determined whether or not the shutter is fully open. When it is determined that the shutter is fully open, the strobe light is emitted via step S109 (step S110). However, in step S109, the flag F
If = 1 is not satisfied, the process immediately proceeds to step S111 without emitting strobe light.

In step S111, since exposure unevenness occurs when the shutter is not fully opened, the flash reflected light from the subject is adjusted. When the proper exposure is reached, step S
Proceed to 112 and stop flash emission.

When it is determined in step S108 that the shutter is not fully opened, in step S114
Step S to set the shutter time determined previously
The process proceeds to 113 and the shutter closing operation is started.

Next, when it is confirmed in step S114 that the shutter is fully closed, the film is released in step S115.
Roll up the frames. In step S116, the flag F is reset and the process returns to the main flow (FIG. 6).

In step S12 of FIG. 6, when it is confirmed that the video recording start switch SW5 is turned on, recording start processing is performed (step S13), and the recording means 33 is driven.
When it is confirmed in step S14 that the video recording start switch SW5 is off, recording is stopped (step S15), and the recording means 33 is stopped. Then, it is determined whether or not the power switch SW1 is off. If not, the process returns to step S2 to repeat the above operation. When the power switch SW1 is off, a series of operations is ended.

During recording, the audio signal supplied through the audio sampling means 34 and the microphone (FIG. 5) is also recorded in the recording means 33. The display means 30 is an LCD.
The panel or LED is turned on to notify the flash emission, or the film counter is displayed.

[0027]

As described above, according to the still camera-integrated video camera of the present invention, the photographing lens group 1 is used for both the video camera and the still camera.
Compared with the case where the still camera and the video camera are independent, it is possible to improve the space factor and obtain a still camera-integrated video camera having excellent portability.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of a still camera-integrated video camera according to the present invention.

FIG. 2 is a conceptual diagram showing a first embodiment of a still camera-integrated video camera according to the present invention.

FIG. 3 is a side view showing a second embodiment of a still camera-integrated video camera according to the present invention.

FIG. 4 is a side view showing a second embodiment of a still camera-integrated video camera according to the present invention.

FIG. 5 is a block connection diagram showing an electric circuit of a still camera-integrated video camera according to the present invention.

FIG. 6 is a flowchart illustrating an operation of the still camera-integrated video camera according to the present invention.

FIG. 7 is a flowchart illustrating an operation of the still camera-integrated video camera according to the present invention.

[Explanation of symbols]

 1 Photographic lens group 3 Reflective surface 4 Photographic lens group 5 CCD 8 Shutter 9 Lens frame 9a Male screw 10 Focusing drive ring 11 Focusing frame 11a Female screw 12 Aperture mechanism section 13 Photointerrupter 14 Cam barrel 19 Lens frame 19a Screw 19b Motor 19c Motor Axis 19d Slit 21 Lens group

Claims (3)

[Claims] 1. A first photographing lens group which transmits photographing light, and a photographing lens which is disposed behind the first photographing lens group and reflects the photographing light transmitted through the first photographing lens group to the outside of an optical path to form an image. A reflecting surface forming a surface, a first image pickup unit arranged on the image forming surface formed by the reflecting surface, and a second taking lens forming an image forming surface of the photographing light transmitted through the first taking lens group. And a second lens arranged on an image forming plane formed by the second photographing lens group.
A still camera integrated video camera equipped with an image pickup means. 2. The video camera with integrated still camera according to claim 1, wherein the first image pickup means is an image pickup means for a video camera, and the second image pickup means is an image pickup means for a still camera. camera. 3. The video camera with integrated still camera according to claim 1, wherein the reflecting surface is a semi-transmissive mirror.