Center masking add-on illuminator

Details Center masking add-on illuminator Center masking add-on illuminator

1997-03-14

1999-10-19

Nguyen, Thong

Optical: systems and elements

Compound lens system

Microscope

359385, 359388, G02B 2106

Patent

active

059698560

ABSTRACT:
Apparatus for masking (center and peripheral) the microscope condenser lens to simultaneously maximize resolution, contrast and depth of field utilizing, at a conjugate plane of the aperture plane where an image of the rear aperture of the condenser lens has been created, a plurality of light sources to illuminate two or more of the faces of a multi-faced mirror in the shape of a pyramid which moves relative to the light sources to vary the amount of center masking continuously over a range including zero while directing multiple oblique beams of light onto the objective lens including such apparatus for connection to the illumination port of a light microscope in place of a standard light source.

REFERENCES:
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patent: 4407569 (1983-10-01), Piller et al.
patent: 4585315 (1986-04-01), Sincerbox et al.
patent: 5046837 (1991-09-01), Stroomer et al.
patent: 5078473 (1992-01-01), McKeown et al.
patent: 5245175 (1993-09-01), Inabata
patent: 5345333 (1994-09-01), Greenberg
patent: 5684626 (1997-11-01), Greenberg

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