Illumination system for use with an optical instrument having an

Details Illumination system for use with an optical instrument having an Illumination system for use with an optical instrument having an

1998-08-18

2000-02-08

Nguyen, Thong

Optical: systems and elements

Compound lens system

Microscope

359385, 359390, G02B 2106

Patent

active

060233680

ABSTRACT:
An optical microscope has an illuminator from which light emanates to illuminate an object under examination, and an auxiliary magnifying lens unit which magnifies an image of the object formed by the light reflecting from the object. A reflective cover is connected to the bottom of the ocular lens unit of the microscope. An auxiliary magnifying unit, made up of the auxiliary magnifying lens mounted in a casing, is disposed within the reflective cover adjacent the bottom of the ocular lens unit. The illuminator is located between the reflective cover and the casing of the auxiliary magnifying unit. The auxiliary magnifying lens is thus shielded from the illuminator. The light emitted from the illuminator is prevented from propagating directly to the auxiliary magnifying lens (along any straight line from the illuminator) or indirectly to the auxiliary magnifying lens via reflection from the inner wall of the reflective cover. Accordingly, a clear image of the object is produced. Furthermore, the reflective cover screws the auxiliary magnifying unit onto the bottom of the ocular lens unit. These components can be easily and quickly assembled and disassembled as the need arises.

REFERENCES:
patent: 1444400 (1923-02-01), Silverman
patent: 1873149 (1932-08-01), Perez
patent: 5198927 (1993-03-01), Rathbone et al.
patent: 5820250 (1998-10-01), Betts et al.

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