Objective lens device for a microscope

Details Objective lens device for a microscope Objective lens device for a microscope

2006-09-05

2006-09-05

Nguyen, Thong Q (Department: 2872)

Optical: systems and elements

Compound lens system

Microscope

C359S368000, C359S425000

Reexamination Certificate

active

07102817

ABSTRACT:
An objective lens for a microscope has a casing, a telescopic tube assembly and a cap. The casing is tubular and has a through hole and a window. The telescopic tube assembly has an outer tube, an inner tube and an objective lens. The outer tube is mounted rotatably in the casing and has an inner thread and an annular knob aligned with the window. The inner tube mounted rotatably and moveably in the outer tube. The objective lens is mounted in the inner tube. The cap is mounted on the casing and has two guides mounted between the casing and the cap and slidably engaging the inner tube so the inner tube can move along the guides. The magnification and focal length of the microscope changes when the inner tube with the objective lens moves in the outer tube.

REFERENCES:
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patent: 5894346 (1999-04-01), Gu-pin et al.
patent: 6147797 (2000-11-01), Lee
patent: 6407768 (2002-06-01), Ishikawa
patent: 6690510 (2004-02-01), Kanao
patent: 52-25653 (1997-02-01), None

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