Title:
MICROSCOPE PHOTOGRAPHIC LENS
Document Type and Number:
Japanese Patent JP3121068
Kind Code:
B2
Abstract:
PURPOSE: To provide the photographic lens which has various aberrations excellently compensated and is used for such a microscope that its objective and ocular have curvature of field compensated independently of each other.
CONSTITUTION: The microscope photographic lens consists of a 1st lens group G1 in a meniscus shape which is convex to the objective, a 2nd lens group G2 in a meniscus shape which is concave to the objective across an intermediate image position, and a 3rd lens group G3 with positive refracting power, and (1) -0.3<FB/D<0.5 and (2) 0.1<d11/D<0 hold. Here, FB is the back focus of the whole system, d11 is the overall thickness of the 2nd lens group G2, and D is the overall length from the 1st surface of the 1st lens group G1 to the final surface of the 3rd lens group G3.
Inventors:
Suzuki Toshinobu
Yasushi Fujimoto
Yokoya Asako
Yasushi Fujimoto
Yokoya Asako
Application Number:
JP28122491A
Publication Date:
December 25, 2000
Filing Date:
October 28, 1991
Export Citation:
Assignee:
Olympus Optical Co., Ltd.
International Classes:
G02B9/12; G02B21/00; G02B21/02; G02B25/00; (IPC1-7): G02B25/00; G02B21/00
Domestic Patent References:
| JP57108822A |
Attorney, Agent or Firm:
Hiroshi Nirazawa (7 outside)