Optical: systems and elements – Lens – Multiple component lenses
Patent
1994-08-23
1996-02-20
Neyzari, Ali
Optical: systems and elements
Lens
Multiple component lenses
359778, G02B 936
Patent
active
054934494
ABSTRACT:
An imagery lens system for image reading consists of first to fourth lens elements which are arranged in this order from the object side. The first and fourth lens elements respectively are double-convex lenses, and the second and third lens elements respectively are double-concave lenses. The following formulae are satisfied.
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patent: 2407347 (1946-09-01), Sachtleben
patent: 3619036 (1971-11-01), Baken
patent: 4264139 (1981-03-01), Maeda
patent: 4285579 (1981-08-01), Yamada
patent: 4415241 (1983-01-01), Shinohara
patent: 4781449 (1988-04-01), Hirakawa et al.
patent: 5139342 (1992-08-01), Matsuzaki
Ferguson Jr. Gerald J.
Fuji Photo Optical Co., Ltd.
Neyzari Ali
Papalas Michael A.
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