1989-12-05
1990-10-23
Henry, Jon W.
350401, 350402, 350404, G02B 2728, G02B 2114, G02B 530, G02B 108
Patent
active
049647075
ABSTRACT:
The differential interference microscope comprises a beam splitter and a compensator, either one being made of a positive birefringent substance and the other being made of a negative birefringent substance, which are arranged in such a manner that the optic axes of both the prisms are located substantially on the same plane, or a polarizing optical element composed by combining a wedge-shaped prism made of a positive birefringent substance with another wedge-shaped prism made of a negative birefringent substance in such a manner that the optic axes of both the prisms are located substantially on the same plane. The differential interference microscope is capable of providing a uniform visual field without enhancing manufacturing cost therefor nor enlarging the space to be occupied thereby.
REFERENCES:
patent: 3614195 (1971-10-01), Voller
patent: 3868168 (1975-02-01), deVeer
patent: 3904267 (1975-09-01), deVeer
Henry Jon W.
Olympus Optical Co,. Ltd.
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