Title:
内視鏡対物レンズ系
Document Type and Number:
Japanese Patent JP4681921
Kind Code:
B2
Abstract:
The system has a filter group (30) provided in the form of coplanar plates and arranged directly before an image surface of a solid body-imaging device. A positive rear lens group (20) is provided with positive and negative lens units and a biconvex positive lens unit, which are arranged in the order viewed from an object. A negative front lens group (10) is provided with an individual lens unit or several non-cemented lens units.
Inventors:
Minoru Murayama
Application Number:
JP2005099930A
Publication Date:
May 11, 2011
Filing Date:
March 30, 2005
Export Citation:
Assignee:
HOYA CORPORATION
International Classes:
G02B13/00; A61B1/00; G02B13/22; G02B23/26
Domestic Patent References:
| JP2004117607A | ||||
| JP2002228926A | ||||
| JP1048514A | ||||
| JP968648A |
Attorney, Agent or Firm:
Kunio Miura
Iwao Hirayama
Iwao Hirayama