Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
DIAPHRAGM
Document Type and Number:
WIPO Patent Application WO/2004/107036
Kind Code:
A1
Abstract:
A small, lightweight diaphragm being fixed readily to the lens-barrel of a CCTV camera and equipped with an optical filter being inserted retractably on the optical path. The diaphragm comprises a diaphragm substrate (10) having an opening (10a) forming the optical path, a pair of diaphragm blades (12, 13) placed on one plate surface of the diaphragm substrate and restricting the optical path by sliding along that plate surface, a driver (20) for driving the diaphragm blades (12, 13) in order to restrict the optical path, an optical filter (infrared cut filter) having transmission characteristics dependent on the wavelength, and a filter driver (30) for inserting the optical filter on the optical path or removing it from the optical path. The optical filter is formed into a thin film shape and placed between two diaphragm blades (12, 13) slidably along the diaphragm blades. The optical filter (15) is supported rotatably on a supporting shaft (10c), and the diaphragm driver (20) and the filter driver (30) are arranged on the same side with respect to the optical path.

Inventors:
Negishi, Shigeto c/o NIHON SEIMITSU SOKKI CO. LTD. (2508-13, Nakago, Komochi-mur, Kitagunma-gun Gunma, 377-0293, JP)
Saitoh, Shigeki c/o NIHON SEIMITSU SOKKI CO. LTD. (2508-13, Nakago, Komochi-mur, Kitagunma-gun Gunma, 377-0293, JP)
Tomaru, Takashi c/o NIHON SEIMITSU SOKKI CO. LTD. (2508-13, Nakago, Komochi-mur, Kitagunma-gun Gunma, 377-0293, JP)
Application Number:
PCT/JP2003/006753
Publication Date:
December 09, 2004
Filing Date:
May 29, 2003
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NIHON SEIMITSU SOKKI CO., LTD. (2508-13, Nakago Komochi-mur, Kitagunma-gun Gunma, 377-0293, JP)
Negishi, Shigeto c/o NIHON SEIMITSU SOKKI CO. LTD. (2508-13, Nakago, Komochi-mur, Kitagunma-gun Gunma, 377-0293, JP)
Saitoh, Shigeki c/o NIHON SEIMITSU SOKKI CO. LTD. (2508-13, Nakago, Komochi-mur, Kitagunma-gun Gunma, 377-0293, JP)
Tomaru, Takashi c/o NIHON SEIMITSU SOKKI CO. LTD. (2508-13, Nakago, Komochi-mur, Kitagunma-gun Gunma, 377-0293, JP)
International Classes:
G03B9/02; G03B9/04; G03B11/00; (IPC1-7): G03B9/02; G03B11/00
Foreign References:
JP2002189238A
JPH11109440A
JPH11149104A
JPH0267530A
JPH10133254A
JP2003005005A
JP2000106649A
JPH10254022A
JP2002049073A
Attorney, Agent or Firm:
Aniya, Setuo (21 TOWA BLDG. 3F, 4-6-1 Iidabash, Chiyoda-ku Tokyo, 102-0072, JP)
Download PDF: