Title:
ズーム結像光学系、及び、それを備えた顕微鏡
Document Type and Number:
Japanese Patent JP5730671
Kind Code:
B2
Abstract:
A zoom image-forming optical system used in combination with an infinity-correction objective lens, the zoom image-forming optical system including: a tube lens for condensing a luminous flux from the objective lens to form an intermediate image; and a relay lens with a zoom function for projecting the intermediate image onto an image plane. The relay lens includes a first lens group with positive power, a second lens group that belongs to a movable group with positive power, a third lens group that belongs to a movable group with positive or negative power, and a fourth lens group with negative power, in this order from the intermediate image side. The zoom image-forming optical system changes its magnifying power by moving the second lens group and the third lens group in an optical axis direction.
Inventors:
Hirofumi Yamamoto
Application Number:
JP2011122211A
Publication Date:
June 10, 2015
Filing Date:
May 31, 2011
Export Citation:
Assignee:
Olympus Endo Technology America Inc.
International Classes:
G02B21/02; G02B15/167; G02B21/00
Domestic Patent References:
| JP9274137A |
Foreign References:
| WO2009031549A1 |
Attorney, Agent or Firm:
Yoshiyuki Osuga