Surgical microscope with rapid focal-length changer

Details Surgical microscope with rapid focal-length changer Surgical microscope with rapid focal-length changer

1989-09-20

1990-12-04

Arnold, Bruce Y.

350256, 350409, G02B 702, G02B 300

Patent

active

049749510

ABSTRACT:
The invention contemplates a stereoscopic binocular surgical microscope wherein a principal objective of defined focal length is rigidly attached to the microscope and serves both observation-ray paths; an additional lens system is swingably positionable in and out of the ray paths for quick change of focal length, without changing the principal objective, and the additional lens system has provision for selective small radial adjustment of the axis of the additional lens system with respect to the axis of the principal objective, when in operative position.

REFERENCES:
patent: 1717755 (1929-06-01), Brady
patent: 4448498 (1984-05-01), Muller et al.

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