Prism construction for simultaneous zero-degree and oblique...

Details Prism construction for simultaneous zero-degree and oblique... Prism construction for simultaneous zero-degree and oblique...

2005-07-05

2005-07-05

Nguyen, Thong Q (Department: 2872)

Optical: systems and elements

Compound lens system

Microscope

C359S368000, C359S385000

Reexamination Certificate

active

06914721

ABSTRACT:
The invention concerns an apparatus for simultaneous zero-degree and oblique illumination for an optical viewing device, in particular a stereoscopic surgical microscope, which contains a shiftable prism combination (3) for deflecting a first illumination sub-beam a long distance from the optical axis (12) of the main objective in order to obtain an oblique illumination beam (9) (oblique illumination), and for deflecting a second illumination sub-beam (8) a short distance from the optical axis (12) of the main objective in order to obtain a zero-degree illumination (8).

REFERENCES:
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patent: 5627613 (1997-05-01), Kaneko
patent: 5898518 (1999-04-01), Biber
patent: 6624932 (2003-09-01), Koetke
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patent: WO 99/59016 (1999-11-01), None
Carl Zeiss Brochure for the OMPI MDO.—Zeiss, Germany—Oct. 1991, pp 1-4.

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