Objective system for video disc

Details Objective system for video disc Objective system for video disc

1982-03-11

1984-05-08

Corbin, John K.

350414, G02B 934

Patent

active

044471386

ABSTRACT:
An objective system for a video disc comprising four lenses grouped into four lens components. The first lens component is a positive meniscus lens, the second lens component is a positive meniscus lens, the third lens component is a positive meniscus lens having a relatively long focal length or a negative meniscus lens, and the fourth lens component is a positive meniscus lens. The objective system satisfies the following conditions:

REFERENCES:
patent: 4258981 (1981-03-01), Goto

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