Light diffuser for optical microscopes replacing condenser...

Details Light diffuser for optical microscopes replacing condenser... Light diffuser for optical microscopes replacing condenser...

2005-11-08

2005-11-08

Dunn, Drew A. (Department: 2872)

Optical: systems and elements

Compound lens system

Microscope

C359S368000, C359S599000

Reexamination Certificate

active

06963445

ABSTRACT:
A light diffuser for use in illumination systems of optical microscopes which utilize a light source to illuminate a specimen staged on the microscope for observation. The light diffuser includes a light diffusing plate made of opal glass positioned closely adjacent the specimen. The light diffusing plate randomly breaks up light transmitted from a light source which passes therethrough into spatially isotopic light. The isotropic light illuminates the specimen for observation of a specimen image through the microscope with substantially reduced diffraction shadows which obscure the specimen. The light diffuser is utilized as part of an illumination lens system for microscopes and a method of use thereof which includes a plurality of lenses, an aperture diaphragm, and a field diaphragm which allow adjustment of the contrast and field of illumination of the image.

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patent: 2002/0001074 (2002-01-01), Baer et al.

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