Epi-illumination apparatus

Details Epi-illumination apparatus Epi-illumination apparatus

2005-11-08

2005-11-08

Robinson, Mark A. (Department: 2872)

Optical: systems and elements

Compound lens system

Microscope

C359S389000

Reexamination Certificate

active

06963446

ABSTRACT:
An epi-illumination apparatus has, in the following order from an light source device side, a first imaging lens which forms an image of the light source and a field lens which projects the image of the light source to an object to be illuminated. Either one of a first magnification varying unit or a second magnification varying unit is selectively disposed between the first imaging lens and the field lens in order to vary a magnification of the image of the light source. The first magnification varying unit has a first aperture stop and a second imaging lens that is disposed in the field lens side of the first aperture stop, while the second magnification varying unit has a second aperture stop and a third imaging lens that is disposed in the first imaging lens side of the second aperture stop.

REFERENCES:
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patent: 5777784 (1998-07-01), Tanaka
patent: 2002/0159143 (2002-10-01), Yonezawa
patent: 6-289301 (1994-10-01), None

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