Object lens and condenser

Details Object lens and condenser Object lens and condenser

2004-11-24

2010-02-09

Nguyen, Thong (Department: 2872)

Optical: systems and elements

Lens

Microscope objective

C359S387000, C359S227000, C359S236000

Reexamination Certificate

active

07660045

ABSTRACT:
An object lens includes a first optical system that obtains a magnified image of an object, a second optical system that guides dark field illumination light to the object, a barrel that contains the first optical system and the second optical system and has an optical path around the first optical system for the dark field illumination light, and a shield mechanism that is disposed on the optical path and that varies the incident area of the dark field illumination light to shield the dark field illumination light.

REFERENCES:
patent: 2007/0127117 (2007-06-01), Vodyanoy et al.
patent: 34 09 657 (1985-09-01), None
patent: 60-225817 (1985-11-01), None
patent: 03-157609 (1991-07-01), None
patent: 09-068655 (1997-03-01), None
patent: 10-031164 (1998-02-01), None
patent: 10-039227 (1998-02-01), None

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