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Title:
CAMERA AND DEVICE FOR SWITCHING OPTICAL FILTERS
Document Type and Number:
WIPO Patent Application WO/2001/016649
Kind Code:
A1
Abstract:
A device for switching optical filters of a camera constantly provides clear images during the day and night. A lens (1a) mounted on a camera body (1) forms an image on an imaging device (2), which in turn converts the image into an electric signal to obtain an image signal. Means (3) for switching optical filters (3a, 3b) depending on the level of the image signal is provided in front of the imaging device (2). The camera can be advantageously used in a monitoring system to improve reliability since it provides clear images during the day and night.

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Inventors:
IKOMA KEN (JP)
TAMURA KAZUSHIGE (JP)
TAKAKUWA MAKOTO (JP)
Application Number:
PCT/JP2000/005934
Publication Date:
March 08, 2001
Filing Date:
August 31, 2000
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
IKOMA KEN (JP)
TAMURA KAZUSHIGE (JP)
TAKAKUWA MAKOTO (JP)
International Classes:
G02B5/20; G03B7/18; G03B11/00; G03B11/06; G03B15/00; G03B17/20; H04N5/225; H04N5/238; H04N7/18; H04N5/33; (IPC1-7): G03B7/18
Foreign References:
JP2000224469A2000-08-11
US4437111A1984-03-13
JPH0283538U1990-06-28
US5982423A1999-11-09
JPH05110938A1993-04-30
JPH04128471U1992-11-24
US4695878A1987-09-22
JPH11125852A1999-05-11
JP2000162665A2000-06-16
JPH11196308A1999-07-21
JPH1195092A1999-04-09
JPH11196307A1999-07-21
JP2000059798A2000-02-25
JPS59101576U1984-07-09
JPH0998322A1997-04-08
JPH11202398A1999-07-30
JPH10112816A1998-04-28
US5982423A1999-11-09
US4695878A1987-09-22
JPH11125852A1999-05-11
JPH0418888A1992-01-23
US4945367A1990-07-31
Other References:
See also references of EP 1130457A4
Attorney, Agent or Firm:
Oguri, Shohei (28th floor ARK Mori Buidling 12-32 Akasaka 1-chome Minato-ku, Tokyo, JP)
Download PDF:
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