Optical system of optical information recording/reproducing appa

Details Optical system of optical information recording/reproducing appa Optical system of optical information recording/reproducing appa

1993-01-14

1994-06-14

Ben, Loha

Optical: systems and elements

Single channel simultaneously to or from plural channels

359641, 359793, 359796, 369 4439, 369112, G02B 2710, G02B 904

Patent

active

053215508

ABSTRACT:
An optical system of an optical information recording/reproducing apparatus including a light source for emitting a generally parallel luminous flux; an objective optical system for converging the luminous flux emitted from the light source onto a medium; a beam splitter for splitting the luminous flux reflected by the medium from a light path directed to the light source and guiding the same to a light receiving system; a chromatic aberration correcting element having almost no power disposed between the objective lens and the beam splitter and adapted to correct a chromatic aberration of the objective lens; and means for independently actuating the objective lens at least in an optical axis direction thereof.

REFERENCES:
patent: 4484803 (1984-11-01), Arai
patent: 4557564 (1985-12-01), Rosmalen
patent: 4572623 (1986-02-01), Tanaka et al.
patent: 4721373 (1988-01-01), Sugiyama
patent: 4753524 (1988-06-01), Sugiyama
patent: 4791625 (1988-12-01), Nakamura
patent: 4909616 (1990-03-01), Arai
patent: 4976526 (1990-12-01), Oshima et al.
"Single Lens CD Player Pickup System Using a Bi-aspheric Molded Glass Lens" (Sunohara et al.), I.E.E.E. Transactions on Consumer Electronics, vol. CE-33, No. 4, pp. 520-530, Nov. 1987, New York, N.Y.

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