JPH0537835A - Camera - Google Patents

Abstract

PURPOSE:To provide the camera with small size and light weight in which video image pickup and still picture pickup are implemented simultaneously by using a sole lens system. CONSTITUTION:A beam splitter 12 splits a light from an object passing through a lens system 10 into two directions. A CCD area sensor 22 is arranged on a 1st optical path split by the beam splitter 12 to convert a light into an electric signal. The electric signal is inputted to a VTR 26 and recorded on a VTR tape 30. On the other hand, when a shutter 32 arranged on the 2nd optical path 20 split by the beam splitter 12 is released by a shutter switch 34, a photosensing film 38 accommodated in a film holder 36 is sensitized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a video image shooting function and a still image shooting function.

[0002]

2. Description of the Related Art Conventionally, as a camera provided with a video image shooting function and a still image shooting function, Japanese Patent Laid-Open No. 3-31835 is known.
A camera as shown in Japanese Patent Publication has been proposed. This camera is a combination of a video camera for shooting video images and a photo camera for shooting still images.It has a first lens system for video cameras and a second lens system for photo cameras. However, the same subject can be photographed through the first lens system and the second lens system. Moreover, since the first lens system and the second lens system are configured to be driven in conjunction with each other so that the same subject is in focus, it is possible to simultaneously capture still images while capturing video images. ..

[0003]

However, the camera described in the above publication is provided with a lens system and a lens system drive device for focus adjustment for capturing a video image,
Aside from that, the camera has a small size because it is equipped with a lens system for still image shooting and a focus adjustment lens system driving device.
There is a problem that it is difficult to reduce the weight.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to perform video image shooting and still image shooting at the same time by using only one lens system, and to reduce the size and weight. The purpose is to provide a camera that can do this.

[0005]

In order to achieve this object, a camera of the present invention comprises a lens system that allows light from an object to pass therethrough, and a first optical path and a second optical path for the light that has passed through the lens system. An optical path splitting means for splitting the optical path into a magnetic recording medium, a photoelectric conversion means arranged on the first optical path split by the optical path splitting means for converting the light into an electric signal, A recording unit, a shutter arranged on the second optical path divided by the optical path dividing unit, a photosensitive member mounted on the second optical path and behind the shutter and having a photosensitive film loaded therein. Film mounting means.

[0006]

In the camera of the present invention having the above structure,
The optical path splitting means splits light that has passed through the lens system from the subject into a first optical path and a second optical path. The photoelectric conversion means is arranged on the first optical path divided by the optical path dividing means and converts light into an electric signal. The magnetic recording unit records the electric signal converted by the photoelectric conversion unit on the magnetic recording medium. The shutter is arranged on the second optical path split by the optical path splitting means. The photosensitive film mounting means is arranged on the second optical path and behind the shutter,
Load photosensitive film.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the structure of a camera 1 of the present invention. The lens system 10 of the camera 1 is composed of one or a plurality of lenses. The beam splitter 12 and the mirror 14, which are optical path splitting means, are configured so that the light from the subject 16 is incident through the lens system 10 and split into a first optical path 18 and a second optical path 20. The CCD area sensor 22, which is a photoelectric conversion unit, is arranged on the first optical path 18 and converts incident light into an electric signal.
The finder 24 inputs the electric signal converted by the CCD area sensor 22 and outputs the image information of the subject 16, so that the operator can confirm the image. The VTR 26, which is a magnetic recording unit, records the electric signal on the VTR tape 30, which is a magnetic recording medium, when the recording switch 28 is pressed. The shutter 32 is arranged on the second optical path 20 and normally blocks the second optical path 20. However, by pressing the shutter switch 34, the shutter 32 is released for a preset exposure time. , Close again.

A film holder 36, which is a photosensitive film mounting means, is provided with a photosensitive film 3 in a photosensitive film storage portion 36a.
8 is accommodated, the photosensitive film 38 to which the image of the subject 16 is exposed when the shutter 32 is released is arranged on the second optical path 20, and the exposed photosensitive film 38 is wound onto the photosensitive film. It is configured to be stored in the portion 36b. The lens driving device 40 focuses one or more lenses in the lens system 10 when focusing the image of the subject 16 projected on the CCD area sensor 22 and the photosensitive film 38 and enlarging or reducing the image. Is configured by an arithmetic unit (not shown), a drive motor, and a gear so as to move along the optical axis. The housing 2 of the camera 1 is provided with a light intake port 42 formed of transparent plastic, glass, or the like so that light from the subject 16 is incident on the lens system 10.

Next, the operation of the camera 1 thus constructed will be described.

First, a video image taken by the camera 1 is VTR.
The operation of recording on the tape 30 will be described.

The light from the subject 16 is received by the light intake port 42.
After passing through the lens system 10 via the beam path, the beam is incident on the beam splitter 12 and is split into two directions, that is, a straight traveling direction and a direction reflected at a right angle. Of the split light, the light in the straight traveling direction travels along the first optical path 18 and enters the CCD area sensor 22. On the other hand, the light reflected at a right angle travels through the second optical path 20 and is incident on the shutter 32 after the optical path is changed again by the mirror 14 in the right angle direction. When the camera is powered on,
The light from the subject 16 incident on the CCD area sensor 22 is converted into an electric signal. At this time, in order to always focus the image of the subject 16 on the CCD area sensor 22, the lens drive device 40 performs arithmetic processing on the electric signal by a known method to optimize the lens of the lens system 10. The position is calculated, and if necessary, the lens driving device 40
Is used to move one or more lenses along the optical axis. Further, since the electric signal is input to the finder 24 and the image information of the subject 16 is output, the operator can confirm the image of the subject 16.

When the recording switch 28 is pressed here, V
The electric signal input to the TR 26 is recorded on the VTR tape 30 by a known method. The operator is the subject 1
While checking the image of 6 with the viewfinder 24,
An image of the subject 16 can be recorded on the tape 30.

Next, the operation of recording an image taken by the camera 1 on the photosensitive film 38 will be described.

The light from the subject 16 is received by the light intake port 42.
After passing through the lens system 10 via the beam path, the beam is incident on the beam splitter 12, and is split into two directions, that is, a straight traveling direction and a direction reflected at a right angle. Of the split light, the light in the straight traveling direction travels along the first optical path 18 and enters the CCD area sensor 22. On the other hand, the light reflected at a right angle travels through the second optical path 20 and is incident on the shutter 32 after the optical path is changed again by the mirror 14 in the right angle direction. When the camera is powered on,
The light from the subject 16 incident on the CCD area sensor 22 is converted into an electric signal. At this time, in order to always focus the image of the subject 16 on the CCD area sensor 22, the lens driving device 40 performs arithmetic processing on the electric signal by a known method to optimize the lens of the lens system 10. The position is calculated, and if necessary, the lens driving device 40
Is used to move one or more lenses along the optical axis. Further, since the electric signal is input to the finder 24 and the image information of the subject 16 is output, the operator can confirm the image of the subject 16.

When the shutter switch 34 is pressed here, the shutter 32 is released for an exposure time preset by a method (not shown), so that the light traveling along the second optical path 20 is stored in the film holder 36. 38
And the photosensitive film 38 is exposed. Then, when the shutter 32 is closed, the photosensitive film 38 moves within the film holder 36 by a predetermined length and is stored in the photosensitive film winding section 36b, and the photosensitive film 38 is stored in the photosensitive film 38 for the next shooting. Pulled out from the portion 36a,
It is arranged behind the shutter 32.

Next, the operation of recording the image taken by the camera 1 on the VTR tape 30 and also on the photosensitive film 38 will be described. According to the above-described operation, the light from the subject 16 travels along the first optical path 18, enters the CCD area sensor 22, is converted into an electric signal, and is transmitted to the VTR 2
6 is input. The operator can record the image on the VTR tape 30 while always confirming the image of the subject 16 with the finder 24. If the shutter switch 34 is pressed during the recording, the shutter 32 is opened for the exposure time set by a method not shown, and the light traveling along the second optical path 20 receives the photosensitive film 38 in the film holder 36.
And the photosensitive film 38 is exposed. Shutter 32
When is closed, the photosensitive film 38 moves within the film holder 36 by a predetermined length and is accommodated in the photosensitive film take-up portion 36b.
Is pulled out from the photosensitive film storage portion 36 a and is arranged behind the shutter 32.

As described above, in the camera 1, the light passing through one lens system 10 is used as the beam splitter 12
Since it is divided into two directions by, it is not necessary to provide two lens systems for video image shooting and still image shooting,
The structure is simple, and it is easy to reduce the size and weight.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

For example, in the above-described embodiment, the mirror 14 is fixed and the shutter 32 is opened and closed so that the light from the subject 16 is incident on the photosensitive film 38. However, the shutter 32 is removed and the position of the mirror 14 is changed. May be made movable so that the mirror 14 functions as a shutter so that the light from the subject 16 is incident on the photosensitive film 38 for a desired exposure time.

Although the beam splitter 12 is used as the optical path splitting means in the above embodiment, a half mirror may be used.

[0022]

As is apparent from the above description, according to the camera of the present invention, by using the optical path splitting means for splitting the light passing through the only lens system into two directions, the size and weight can be reduced. Moreover, the optical system is simplified, and video image shooting and still image shooting can be performed at the same time.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a configuration of a camera that is an embodiment of the present invention.

[Explanation of symbols]

 10 lens system 12 beam splitter 16 subject 18 first optical path 20 second optical path 22 CCD area sensor 26 VTR 30 VTR tape 32 shutter 36 film holder

Claims (1)

Claim: What is claimed is: 1. A lens system for passing light from a subject, an optical path splitting device for splitting light passing through the lens system into a first optical path and a second optical path, and the optical path. A photoelectric conversion unit that is disposed on the first optical path divided by the dividing unit and that converts the light into an electric signal, a magnetic recording unit that records the electric signal on a magnetic recording medium, and the optical path dividing unit that divides the electric signal. A camera provided with a shutter arranged on the second optical path and a photosensitive film mounting means arranged on the second optical path and behind the shutter.