1975-12-24
1978-12-05
Sacher, Paul A.
350228, 350231, 350175ML, G02B 304, G02B 912, G02B 906
Patent
active
041283040
ABSTRACT:
A two-component microscope condenser consisting of a biconvex positive doublet as the first component and a convex-plano positive doublet as the second component has excellent correction for spherical aberration and coma with significant reduction of pupillary aberration. The front pupil plane of the condenser is located external to the glass in order to provide utility of the condenser in microscope techniques requiring positioning of optical elements in the pupil plane. A negative lens may be combined with one embodiment of the invention to provide a longer working distance.
REFERENCES:
patent: 2427689 (1947-09-01), Osterberg et al.
patent: 2637242 (1953-05-01), Osterberg et al.
patent: 3743386 (1973-07-01), Aklin et al.
patent: 3914025 (1975-10-01), Dehlink
patent: 3951523 (1976-04-01), Nishimoto
American Optical Corporation
Duggan Jeremiah J.
Sacher Paul A.
Spencer Alan H.
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