JP2805819B2 - Television camera - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television camera, and more particularly, to a television camera using a decomposition optical system such as a prism.

[Conventional technology]

Conventionally, this type of television camera is of a single-plate, two-plate or three-plate type, and in the case of a two-plate or three-plate type, the incident light is separated into two or three colors by a prism, and the image is simultaneously captured. .

[Problems to be solved by the invention]

The above-described conventional television camera, which uses only one solid-state imaging device, has a disadvantage that the image is inverted when the camera is mounted on a ceiling or the like and rotated in the vertical direction of the camera. Also, in a television camera using two or more solid-state imaging devices, two or more solid-state imaging devices are mounted in the same direction.
As in the case of a single solid-state imaging device, there is a disadvantage that the image is reversed when the camera is mounted on the ceiling and rotated in the vertical direction of the camera.

[Means for solving the problem]

A television camera according to the present invention includes a prism that divides incident light from an incident surface into substantially equal amounts in two directions and emits the light from two emission surfaces, and one of the prisms that is disposed to face each of the emission surfaces. The solid-state imaging device includes two solid-state imaging devices that are vertically inverted with respect to the other image, and a switch that switches the output of the solid-state imaging device so that the image is always in one direction.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

 FIG. 1 is a block diagram of one embodiment of the present invention.

As shown in FIG. 1, the light incident on the camera condensed by the lens 6 forms an image on the light receiving surfaces of the two solid-state imaging devices 3 and 4 of the imaging optical unit 1.

 FIG. 2 is a side view of the imaging optical unit of FIG.

As shown in FIG. 2, the imaging optical unit 1 includes prisms 2 and 2
The solid-state imaging devices 3 and 4 have the same characteristics, and any type such as CCD and MOS can be used. The prism 2 divides the light input into two, and is set so that the transmittances of the divided optical paths are equal and the wavelength components of the respective transmitted lights are equal. The solid-state imaging device 3 outputs the input image A is an image signal of the image A ₁ taken in the same vertical direction, the solid-state imaging device 4 of the image A ₂ input image A is captured in the opposite vertical direction image signal Is attached to the prism 2 so as to output.

In FIG. 1, a switch 5 is connected to solid-state imaging devices 3 and 4.
Is input, and only one of the video signals is always output in accordance with the movement of the optical axis of the imaging optical unit 1.

The lens 6 condenses the reflected light from the subject to the solid-state imaging devices 3 and 4 via the prism 2. Video signal processing circuit 7
Is a device to which a video signal of the switch 5 is input, subjected to various processes, and taken out as a video output.

Now, consider a case where the television camera having the configuration shown in FIG. 1 is suspended from the ceiling. When facing directly below the ceiling, one of the solid-state imaging devices 2 and 3 is defined and used.

When the television camera is rotated in the vertical direction of the screen from this state, the subject becomes an upright image in some cases, and the subject becomes an inverted image in some cases. When rotating the screen in the vertical direction to avoid this, the switch 5 is switched so that the video signal from the television camera is always erect by a control signal corresponding to the rotation.

Note that a control signal for switching the switch may be combined with the gyro.

〔The invention's effect〕

As described above, the present invention equally divides the transmittance of the prism into two, attaches two identical solid-state image sensors to both of them so that the output images are vertically inverted, and outputs the output from the solid-state image sensor. By inputting to a switch and switching and extracting either output signal, the image is projected without turning upside down, even if the camera is rotated up and down or left or right when looking down under a ceiling, etc. The effect can be.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG.
It is a side view of the imaging optical part of the figure. Reference numeral 1 denotes an image pickup optical unit, 2 denotes a prism, 3, 4 denotes a solid-state image pickup device, 5 denotes a switch, 6 denotes a lens, and 7 denotes a video signal processing circuit.

Claims (1)

(57) [Claims] 1. A prism which divides incident light from an incident surface in two directions by approximately equal amounts and emits the light from two emission surfaces, and one of the images arranged opposite to each emission surface so that one image is the other image. 1. A television camera comprising: two solid-state imaging devices that are vertically inverted; and a switch that switches an output of the solid-state imaging device so that an image is always in one direction.