Lens system for optical recording type disks

Details Lens system for optical recording type disks Lens system for optical recording type disks

1983-09-07

1986-06-17

Corbin, John K.

350432, G02B 906

Patent

active

045952647

ABSTRACT:
A lens system for optical recording type disks comprising a first and second lenses wherein the first lens is a positive lens and the second lens is a positive lens, the lens system being arranged that at least one of the exit surface of the first lens and respective surfaces of the second lens is formed as an aspherical surface, the lens system being small in size and light in weight and having a long working distance and favorably corrected aberrations.

REFERENCES:
patent: 3014407 (1961-12-01), Altman
patent: 4002406 (1977-01-01), Sussman

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