Reproducing objective for video disks

Details Reproducing objective for video disks Reproducing objective for video disks

1978-08-30

1980-06-10

Sacher, Paul A.

350175ML, G02B 934

Patent

active

042069777

ABSTRACT:
A reproducing objective for video disks comprising a first, second, third and fourth lenses in which the first lens is a biconvex lens, the second lens is a negative meniscus lens, and the third and fourth lenses are positive lenses and for which the working distance is large, flatness of image is high, resolving power is high and weight is extremely light.

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