Image pickup devices and image pickup tubes utilized therein
AssigneeTokyo Shibaura Electric Co., Ltd.
InventorSetsuya Yoshizaki
Life of this patent
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Abstract
The image pickup device comprises an optical system including an objective lens, light beam spliters such as dichroic mirrors and filters, and image pickup tubes for converting incident light into an electric signal. There is provided at least one transparent bias light source disposed between the objective lens and the light beam spliters or between the light beam spliters and the image pickup tubes and comprising a transparent luminescent layer and a pair of transparent electrode layers for applying operating voltage across the luminescent layer. The bias light source can also be built into the image pickup tube.
Claims16
An imagge pickup device comprising at least one image pickup tube including a photoelectric converting section, an optical system for projecting the light beam containing the image information of an object upon said image pickup tube and at least one transparent bias light source arranged between the photoelectric converting section of said image pickup tube and said object on the optical axis of said optical system and said image pickup tube for transmitting said light beam and for superposing thereon uniform bias light.
In an image pickup tube of the type including an envelope containing the electron gun assembly generating an electron beam, and a photoelectric converting section disposed in said envelope to receive said electron beam, the improvement wherein said image pickup tube further comprises at least one transparent bias light source mounted on the light incident surface of said photoelectric converting section, and said bias light source transmits a light beam containing the image information of an object and superposes uniform bias light upon said light beam.
Dependencies are inferred from the claim text.