JPH0530408A - Video camera with still camera - Google Patents

Abstract

PURPOSE:To provide the video camera with a still camera executing automatic focusing to a still camera section and a video camera section in common. CONSTITUTION:An automatic focusing processor 5 applied focus control to optical lens systems 1, 10 via automatic focus drivers 6, 13 based on an electric signal from a solid-state image sensor 3 of a video camera section. Thus, a sharp optical image is formed onto a photo film 12. In this case, the focusing of both the camera sections is not required inexpensively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video camera with a still camera, which is capable of recording moving images and still images of the same subject.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram of a conventional video camera. In the figure, 1 is an optical lens system provided so as to be movable in the front-back direction of the optical axis, and 2 is a position behind the optical lens system 1. The lens barrel 3 is a solid-state image sensor composed of, for example, a CCD or the like, and is fixed in the rear end portion of the lens barrel 2.

A magnetic recording device 4 is connected to the solid-state image sensor 3 and magnetically records a video signal on a magnetic tape.
Is connected to the solid-state image sensor 3 to calculate a control amount for focusing, and an automatic focus control signal (hereinafter,
It is called a control signal. ) Is output, 6 is an autofocus driving device that drives the optical lens system 1 in the front-back direction by a control signal from the autofocus processor 5, 7 is a gear of the autofocus driving device 6, and the optical lens Mechanically coupled to system 1.

Next, the operation of the conventional example will be described with reference to FIG. The light from the subject captured by the optical lens system 1 passes through the lens barrel 2 and forms an image on the solid-state image sensor 3. This optical image is converted into an electric signal by the solid-state image sensor 3 and magnetically recorded on a magnetic tape by the magnetic recording device 4. On the other hand, the electric signal from the solid-state image sensor 3 is transmitted to the autofocus processor 5, and in order to make the optical image on the solid-state image sensor 3 clearer, the amount of forward and backward movement of the optical lens system 1 to the in-focus position. That is, the control amount is calculated by the autofocus processor 5. This calculated value is transmitted to the automatic focus drive device 6 as a control signal. As a result, the automatic focus driving device 6 moves the optical lens system 1 back and forth to the in-focus position by the gear 7.

Since the conventional video camera is constructed as described above and recording is only magnetic recording using a solid-state image sensor, it is better than a still camera which optically exposes a photographic film in terms of resolution and image quality. Was inferior.

Therefore, for example, in Japanese Unexamined Patent Publication No. 1-126635, a still camera is built in and integrated in the same case as a video camera to enable recording of a moving image of the same subject and shooting of a still image by the still camera. A video camera with a still camera has been proposed. In this video camera with a still camera, a beam splitter lens is placed in front of the solid-state image sensor to split the light from one optical lens system, and one of the split lights is introduced into the photographic film through a shutter. It was done.

In addition to this, for example, JP-A-63-7404
A video camera with a still camera is proposed in Japanese Patent Publication No. 4 or the like. In this video camera with a still camera, the still camera is integrated with the video camera, but the optical lens system has separate systems for the video camera and the still camera.

[0008]

Since the conventional video camera with a still camera is configured as described above, there is no concept of moving the optical lens system to the automatic focus, and the automatic focus for both the still camera section and the video camera section is not provided. There was a problem that they could not be matched and were very troublesome in operation.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a video camera with a still camera in which automatic focusing can be commonly performed in the still camera unit and the video camera unit. And

[0010]

According to the video camera with a still camera of the present invention, a common or individual optical lens system of the video camera unit and the still camera unit is set to a focus position based on an electric signal from a solid-state image sensor. A focusing means for driving is provided.

[0011]

In the video camera with a still camera according to the present invention, focusing of the video camera unit and the still camera unit is performed by the focusing means by commonly using the electric signal from the solid-state image sensor of the video camera unit.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In the figure, the same or corresponding parts as those in the conventional example are designated by the same reference numerals as those in FIG. 3, and the description thereof is omitted. In FIG.
The components 1 to 7 are the same as those in the conventional example, and the symbol 1
The video camera unit is configured by the components 4 to 4.

Reference numeral 8 is a shutter, 9 is a diaphragm for adjusting the exposure amount, 10 is an optical lens system that is movable in the front-back direction, 11 is a lens barrel, and 12 is a photographic film loaded in a film mounting mechanism. , 8 to 12 are arranged rearward in this order. Reference numeral 13 denotes an autofocus driving device that drives the optical lens system 10 according to a control signal from the autofocus processor 5, and reference numeral 14 denotes a gear of the autofocus driving device 13, which is mechanically coupled to the optical lens system 10.

A still camera unit is constituted by the components 8 to 12, and the optical lens systems 1 and 10 are integrated with the video camera unit so as to face the same subject.
The autofocus processor 5 and the autofocus driving devices 6 and 13 drive the individual optical lens systems 1 and 10 of the video camera unit and the still camera unit to the in-focus position based on the electric signal from the solid-state image sensor 3. It constitutes a focusing means.

Next, the operation of the first embodiment will be described with reference to FIG. The operation of the video camera unit is the same as the conventional example. The optical image on the solid-state image sensor 3 is converted into an electric signal and sent to the magnetic recording device 4 and also to the autofocus processor 5. The autofocus processor 5 calculates each control amount for moving the optical lens systems 1 and 10 to each in-focus position based on the electric signal from the solid-state image sensor 3, and each control according to the calculation result. The signals are output to the automatic focus driving devices 6 and 13, respectively.

Receiving the respective control signals, the automatic focus driving devices 6 and 13 respectively drive the optical lens systems 1 and 10 in the front-rear direction to position them at respective in-focus positions. On the other hand, when the shutter 8 is temporarily opened and the light from the subject whose light amount has been adjusted by the diaphragm 9 enters through the optical lens system 10, the focus is adjusted on the photosensitive surface of the photographic film 12 as described above. A clear image is formed and the photographic film 12 is exposed. If this photographic film 12 is taken out, developed and printed, a still image of high resolution and high image quality can be obtained on a screen substantially the same as the corresponding screen of the moving image recorded on the magnetic tape by the video camera unit.

Although the video camera unit and the still camera unit are mechanically and electrically integrated in the above embodiment, this is a case where the automatic focus processor 5 and the automatic focus drive device 13 are simply connected by a signal line. However, in the present invention, the concept of integration is included.

FIG. 2 shows a second embodiment of the present invention.
In the above, the difference from the conventional example is that the lens barrel 2 between the optical lens system 1 and the solid-state image sensor 3 has an angle of 45 with respect to the optical axis.
This is that the dichroic mirror 15 tilted is disposed, and the photographic film 12 is disposed on the optical path reflected by the dichroic mirror 15 via the shutter 8. The optical path lengths from the optical lens system 1 to the light receiving surface of the solid-state image sensor 3 and from the optical lens system 1 to the photosensitive surface of the photographic film 12 via the dichroic mirror 15 are equal.

The autofocus processor 5 and the autofocus drive device 6 are focusing means for driving the common optical lens system 1 of the video camera section and the still camera section to the focusing position based on the electric signal from the solid-state image sensor 3. Is composed of.

Next, the operation of the second embodiment will be described with reference to FIG. 2, but a duplicate description with the conventional example will be avoided. After passing through the optical lens system 1, the light from the subject is split by the dichroic mirror 15 toward the solid-state image sensor 3 side and the photographic film 12 side. This beam splitting is performed by the solid-state image sensor 3 and the photographic film 12
The light is split into light having a wavelength corresponding to the sensitivity characteristic of. For example, light having a wavelength with good sensitivity is set to arrive.

When the normally closed shutter 8 is opened, the light reflected by the dichroic mirror 15, that is, one of the light beams split, is imaged on the photosensitive surface of the photographic film 12. Since the formed optical image is equal to the optical path length to the solid-state image sensor 3, it is as clear as the clear optical image on the light receiving surface. It is a solid-state image sensor 3
Based on electrical signals from the autofocus processor 5
This is because the automatic focus drive device 6 adjusts the automatic focus of the optical lens system 1.

In the above embodiment, the simple film mounting system is used, but the automatic winding system also has the same effect as in the above embodiment.

[0023]

As described above, according to the present invention, the automatic focusing of the video camera unit and the still camera unit is performed based on the electric signal of the solid-state image sensor of the video camera unit. There is no need to perform a focusing operation between the camera section and the still camera section, and the electric signal of the solid-state image sensor can be shared by both autofocus points, so there is an effect that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional configuration diagram showing a configuration of a video camera with a still camera according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional configuration diagram showing the configuration of a video camera with a still camera according to another embodiment of the present invention.

FIG. 3 is a simplified cross-sectional configuration diagram showing a configuration of a conventional video camera.

[Explanation of symbols]

 1,10 Optical lens system 2,11 Lens barrel 3 Solid-state image sensor 4 Magnetic recording device 5 Autofocus processor 6,13 Autofocus drive device 8 Shutter 12 Photographic film 15 Dichroic mirror

Claims (1)

Claim: What is claimed is: 1. A video camera with a still camera in which a still camera is integrated with a video camera having a solid-state image sensor to record a moving image and a still image of the same subject. A video camera with a still camera, comprising a focusing means for driving a common or individual optical lens system of the video camera section and the still camera section to a focusing position based on an electric signal from a sensor.