JPS5813660Y2 - Imaging device for color camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color camera image pickup device used in a telecine device, for example, and provides an image pickup device for a color camera that allows the use of a line scanning type image pickup tube or image pickup element.

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

1 passes the incident light from a subject such as a film through a slit that moves in the Yo-Yo force direction as shown in Figure 2.
2..., and this scanning means is, for example, a slit scanning means used in a telecine device to match the number of film frames and the number of television frames.

2 is an imaging lens, 3, 6.6-1.6-2 is a cylindrical lens, and these cylindrical lenses 3, 6 and 4-1 are provided before and after the spectroscopic prism 4 as a dichroic mirror, and the imaging lens 2 At the same time, compression and imaging in the vertical Yo-Yo direction are performed.

Moreover, the imaging lens 2 is Xo-X. It performs directional imaging.

In this way, the optical path 5-
1 is for the color signal, 5-2 is for the luminance signal, and a stripe filter 7-11 is provided on the image-forming surface 7-1 for the color signal among the image-forming surfaces 7-1 and 7-2. .

Further, θ indicates the angle at which the optical paths 5-1 and 52 form images on the lens system B without overlapping on the way.

This lens system B is composed of an imaging lens 8 and a cylindrical lens 9.10, and when the images on the imaging plane 7-1, 7-2 are relayed again by the lenses 8 to 10, the optical axis of the lenses 8 to 10 is 1
The two optical paths 5-1 and 5-2 that are not parallel to lens system B
The beams are made to cross each other, and the same lens 8 is used for Xo-X.

Image formation in the Yo-Yo direction is performed and compressed using l/lenses 8 to 10, and the width 11- in front of the reduction lens 11 is
1 and can be detected by a line scanning type image sensor 12-1, 12-2 provided on the rear surface 11-2.

As explained above using the embodiments, according to the present invention, compression is performed in one direction by the lens system 4 and the spectroscopic prism, and then further compression is performed by the lens system B. A color signal and a luminance signal can be obtained.

Furthermore, since two images are relayed using one lens 4B, the device can be made smaller and lighter.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an imaging device for a color camera according to an embodiment of the present invention, and FIG. 2 is a block diagram of a main part of one optical path thereof. 2.8...Imaging lens, 3,6,9.10...
... Cylindrical lens, 4... Spectroscopic prism.

Claims (1)

[Scope of utility model registration request] Consists of a spectroscopic prism that separates the incident light in the X direction obtained by sequentially scanning the subject in the Y direction into two intersecting optical paths of a luminance signal and a color signal, a first imaging lens, and a first cylindrical lens. The first imaging lens forms an image in the X direction, and the first imaging lens and the first cylindrical lens form an image in the Y direction and compress it, so that a Y image is formed on each of the optical paths.
a first lens system forming an image forming surface compressed in the direction; and a stripe lens system disposed on the image forming surface of the optical path of the color signal.
The second imaging lens is configured to form an image in the X direction of both the imaging planes, and also to form the second image. a second lens system that forms and compresses images on both imaging planes in the Y direction using a lens and a second cylindrical lens to obtain two images that are further compressed in the Y direction; An imaging device for a color camera consisting of two line-scanning imaging tubes or imaging elements that receive images compressed in the Y direction by a system.