1980-01-16
1981-09-29
Clark, Conrad J.
G01B 942
Patent
active
042919525
ABSTRACT:
A Gauss type lens system comprising a first, second, third and fourth lens components, the first lens component being a positive meniscus lens, the second lens component being a cemented doublet consisting of a positive lens and negative lens, the third lens component being a cemented doublet consisting of a negative lens and positive lens, the fourth lens component being a biconvex lens, the Gauss type lens system having the aperture ratio of 1.8 and field angle of 46.degree. and being made low in price by using high refractive-index high dispersion glass materials for many of lenses.
REFERENCES:
patent: 3485549 (1969-12-01), Woltche
patent: 4123144 (1978-10-01), Mandler et al.
Fujii Toru
Takase Hiroshi
Clark Conrad J.
Olympus Optical Co,. Ltd.
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