Optical: systems and elements – Compound lens system – Microscope
Patent
1991-09-04
1992-06-30
Pascal, Robert J.
Optical: systems and elements
Compound lens system
Microscope
359385, G02B 2100
Patent
active
051268779
ABSTRACT:
Disclosed is an illumination system for a surgical microscope comprising an illumination assembly (1), which is located outside the optical axis (2a) of the microscope lens, and two reflecting mirrors (4,6) which are located behind the illumination assembly, each directing respective portions of the illumination light to the operating area. The first reflecting mirror (4) directs its portion of the light onto the operating area at an oblique angle (preferably 6.degree.) relative to the viewing axis (2) of the microscope lens. The position of the second reflecting mirror (6) can be adjusted so that its portion of the light is directed to the operating area along a different path that is either (a) coincident with said viewing axis or (b) oblique to the axis at an angle closer than that formed by the path of the light directed by the first reflecting mirror (i.e., between 0.degree. and 6.degree.). By means of respective diaphragm mechanisms (11,12) associated with each of the reflecting mirrors, the two portions of the light may be individually adjusted to control contrast and/or to select (i) 0.degree. illumination, (ii) oblique illumination, or (iii) various combinations of both types of illumination.
REFERENCES:
patent: 4779968 (1988-10-01), Sander
Carl-Zeiss-Stiftung
Pascal Robert J.
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