Title:
【発明の名称】眼科手術顕微鏡の照明装置における遮光装置
Document Type and Number:
Japanese Patent JPH0771551
Kind Code:
B2
Abstract:
A microscope for examinations and surgical operations on the eye, having provision for projecting onto the eye a hollow beam of illuminating light, the beam having a dark center portion of the same diameter as the pupil of the eye. Thus the surgeon may have adequate illumination of the external surface of the eye around the pupil, without projecting light which might be disturbing or damaging to the patient, onto the retina or fundus of the eye. The light blocking structure, in the form of an annular diaphragm with a light-impervious central portion, is located in the illuminating light beam at a point which is conjugated with respect to the object plane, i.e., the plane of the pupil of the eye being examined. The diaphragm may be moved aside to an ineffective position when required.
Inventors:
Claus Beaver
Gerhard Wohnold
Gerhard Wohnold
Application Number:
JP22139984A
Publication Date:
August 02, 1995
Filing Date:
October 23, 1984
Export Citation:
Assignee:
KARL TWICE-Stiff Tung
International Classes:
A61B3/10; A61B3/13; A61B3/15; A61B19/00; A61F9/008; G02B21/06; (IPC1-7): A61B3/10; A61B19/00; G02B21/06
Domestic Patent References:
| JP51139194A | ||||
| JP52123592A | ||||
| JP56167309U | ||||
| JP4885495U | ||||
| JP5854810U | ||||
| JP56167309U | ||||
| JP429421B1 |
Attorney, Agent or Firm:
Toshio Yano
Next Patent: 核磁気共鳴装置