US 3,945,034 AGranted

Optical system for a color television camera

AssigneeCanon Kabushiki Kaisha

InventorMichiko Suzuki

Life of this patent

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Abstract

An optical system for a color television camera device, wherein a first color-selecting filter is located in a substantially afocal light beam between the front group and the rear group of the relay portion; a first color component light separated by a first color-separating filter forms a first color component image on a first pickup tube with the aid of the first rear group of the relay portion; the light containing the remainder of the color components separated by the first color separating filter is directed to the second rear group of the relay portion; the light from the second rear group containing the abovementioned remainder of the color components is directed to a second color-separating filter; the lights containing second and third color components separated by the second color-separating filter are respectively directed to second and third pickup tubes; and these second and third lights form second and third color component images on second and third pickup tubes with aid of the second rear group of the relay portion.

Claims1

Dependent claims

An optical system for color television camera which comprises in combination:

a. an objective zoom lens composed of a zooming section and a relaying section, wherein said zooming section has a negative Petzval's sum, and said relaying section has a positve Petzval's sum, and includes a front group of a positive refractive power and a first rear group of a positive refractive power, reflectively manner and the other light component light in a transmitting manner, said transmittingly separated light being directed to said first rear group;
b. a second rear group of a positive refractive power, to which said reflexively separated light component by said first color resolving filter is directed, a monochromatic image being formed on a pick-up tube by said second rear group;
and
c. a second light resolving filter disposed after said first rear group of said relaying section, and which resolves further the light transmitted through said first light resolving filter into two light component lights, each of said further resolved light component lights forming a monochromatic image on each of second and third pick-up tubes.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 05/573,587Filed 30 Apr 1975 · continuation in part
Priority: JA 48-4670126 Apr 1973
Granted: 16 Mar 1976
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G02B 27/1013
For splitting or combining different wavelengths: for colour or multispectral image sensors, e.g. splitting an image into monochromatic image…
G02B 27/14
Beam splitting or combining systems: operating by reflection only
H04N 23/16
With multiple sensors: optical arrangements associated therewith, e.g. for beam-splitting or for colour correction
G02B
Optical elements, systems or apparatus