Objective for video disks

Details Objective for video disks Objective for video disks

1979-06-18

1981-06-02

Corbin, John K.

350410, 350414, G02B 906

Patent

active

042708435

ABSTRACT:
An objective for video disks comprising a first and second lens components, the first lens component being a positive cemented doublet, the second lens component being a positive meniscus lens, the objective for video disks being very light in weight and having aberrations such as spherical aberration, sine condition, etc. which are corrected favourably.

REFERENCES:
patent: 1620339 (1927-03-01), Frederick et al.
patent: 3272071 (1966-09-01), Zieglar
patent: 4029398 (1977-06-01), Koizumi

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