Optical: systems and elements – Lens – Multiple component lenses
Patent
1996-09-05
1999-05-04
Font, Frank G.
Optical: systems and elements
Lens
Multiple component lenses
G02B 1700
Patent
active
059009942
ABSTRACT:
In a four-sheet lens configuration composed of convex, concave, convex, and concave lenses, predetermined conditional expressions are satisfied so as to attain a compact size and a wider field angle in a lens system for reading out images, while correcting various kinds of aberration. Further, a bright lens system is obtained. Successively from the object side, a first lens (L.sub.1) comprising a positive meniscus lens with a convex surface directed onto the object side, a second lens (L.sub.2) comprising a biconcave lens, a third lens (L.sub.3.sub.)comprising a biconvex lens, and a fourth lens (L.sub.4) comprising a negative meniscus lens with a convex surface directed onto an imaging surface side are disposed, while the following conditional expressions (1) to (3) are satisfied:
REFERENCES:
patent: 2446402 (1948-08-01), Aklin
patent: 4303313 (1981-12-01), Imai et al.
patent: 4368956 (1983-01-01), Yamada et al.
patent: 4373786 (1983-02-01), Yamada
patent: 4413888 (1983-11-01), Sato
patent: 4443069 (1984-04-01), Mihara
patent: 4477155 (1984-10-01), Sato et al.
patent: 4606607 (1986-08-01), Kurihara
patent: 4659190 (1987-04-01), Mihara
patent: 4688903 (1987-08-01), Fujita et al.
patent: 4767201 (1988-08-01), Fujita et al.
patent: 4792216 (1988-12-01), Kudo
Jap.Pat.Public.No. 1-183614, Jul. 21, 1989, Japan (same as Japanese Patent No. 2-38925, Mar. 9, 1990).
Jap.Pat.Public.No. 61-6616 (A), Jan. 13, 1986, Japan (same as Japanese Patent No. 2-51485, Jul. 11, 1990).
Ishii Akiko
Otomo Ryoko
Font Frank G.
Fuji Photo Optical Co., Ltd.
Snider Ronald R.
Stafira Michael P.
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