Optical system to condense light from a semiconductor laser into

Details Optical system to condense light from a semiconductor laser into Optical system to condense light from a semiconductor laser into

1978-08-30

1980-11-25

Corbin, John K.

1791003V, G02B 2100

Patent

active

042355079

ABSTRACT:
An optical system has an objective lens for focussing on a dotted information carrying video disc the light emitted from a light source of semiconductor laser whose radiant region has different longitudinal and lateral dimensions, and a coupling lens disposed between the objective lens and the laser source for condensing the light from the laser source. The coupling lens has a magnification factor of not greater than 7.

REFERENCES:
patent: 3506329 (1970-04-01), Weaver
patent: 3801181 (1974-04-01), Kitano et al.
patent: 3855426 (1974-12-01), Bouwhuis
patent: 3855607 (1974-12-01), Kressel et al.
patent: 4115809 (1978-09-01), Veno
patent: 4142209 (1979-02-01), Hedlund et al.

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