Objective for video disks

Details Objective for video disks Objective for video disks

1976-05-12

1978-02-14

Clark, Conrad J.

350215, 350175ML, G02B 1132, G02B 1134

Patent

active

040735753

ABSTRACT:
An objective for video disks comprising six lens components of single lenses for which the numerical aperture on the recording surface side is large, working distance is large and aberrations especially spherical aberration and coma are corrected favorably.

REFERENCES:
patent: 3592530 (1971-07-01), Klein

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