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Title:
NEAR-INFRARED RADIATION ILLUMINATOR AND NEAR-INFRARED PICKUP APPARATUS
Document Type and Number:
WIPO Patent Application WO/1985/005220
Kind Code:
A1
Abstract:
An illuminator (4) which radiates light in the near-infrared region, together with a near-infrared pickup apparatus which applies the near-infrared light radiated from the illuminator (4) onto an object and catches the light reflected from the object, thereby picking up the image thereof. The illuminator (4) is composed of a discharge lamp and filters (1), (5), (8) which remove the visible portion of the light radiated from the discharge lamp, but pass the near-infrared portion thereof. Thus it is possible to provide a near-infrared radiation illuminator (4) which has a high efficiency and low deterioration characteristics. If a near-infrared pickup apparatus is composed of the near-infrared radiation illuminator (4) and a pickup apparatus (14), and applies near-infrared light radiated from the illuminator (4) onto an object and catches the light reflected from the object to pick up the image thereof, it is possible to pick up the image of the object without people noticing the image pickup operation. This means that the present invention can be applied to a burglar monitor (13), making it possible to watch any intruder satisfactorily. When the present invention is applied to a visitor-verification device, a visitor is not subjected to any unpleasantness due to the glare of illuminating light, or the realization of being imaged.

Inventors:
Anzai
Yoshinori, Saikatsu
Takeo, Saito
Masato, Tsuchihashi
Michihiro
Application Number:
PCT/JP1984/000238
Publication Date:
November 21, 1985
Filing Date:
May 11, 1984
Export Citation:
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Assignee:
MITSUBISHI DENKI KABUSHIKI KAISHA ANZAI
Yoshinori, Saikatsu
Takeo, Saito
Masato, Tsuchihashi
Michihiro
International Classes:
G08B13/194; H01J61/38; (IPC1-7): H01J61/38
Foreign References:
JPS56167252A1981-12-22
JPS4818085A
JPS4736563A
JPS4536996B1
Other References:
See also references of EP 0181400A4
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