Title:
【発明の名称】内視鏡対物レンズ
Document Type and Number:
Japanese Patent JP2646350
Kind Code:
B2
Abstract:
An objective for an endoscope comprising, in the order from the object side, a first lens unit I having negative refractive power, a second lens unit II having positive refractive power, a third lens unit III having positive refractive power, an aperture stop S arranged between the front end of the second lens unit and rear end of the third lens unit and a fourth lens group IV comprising a lens component which has a concave surface on the object side, the four unit objective for an endoscope being arranged so that the overall length is short, outer diameter of the objective is small, angle of view is wide, intensity of light in the marginal portion is high, and distortion is corrected favourably.
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| JP2011237525 | IMAGING MODULE |
| JPS6382620 | ELECTRONIC TYPE ENDOSCOPE APPARATUS |
| WO/1991/003201 | ENDOSCOPE WITH TV CAMERA |
Inventors:
OKABE MINORU
NISHIOKA KIMIHIKO
YOKOTA AKIRA
NISHIOKA KIMIHIKO
YOKOTA AKIRA
Application Number:
JP1467386A
Publication Date:
August 27, 1997
Filing Date:
January 28, 1986
Export Citation:
Assignee:
ORINPASU KOGAKU KOGYO KK
International Classes:
G02B23/26; G02B9/60; G02B9/62; G02B9/64; G02B13/18; G02B23/24; (IPC1-7): G02B13/18; G02B9/60; G02B9/62; G02B9/64; G02B23/26
Domestic Patent References:
| JP4744810B1 | ||||
| JP5026364Y1 |
Attorney, Agent or Firm:
Koji Mukai