Optical system for optical disc apparatus including anamorphic p

Details Optical system for optical disc apparatus including anamorphic p Optical system for optical disc apparatus including anamorphic p

1992-07-23

1995-12-19

Sikes, William L.

Optical: systems and elements

Lens

Anamorphic

359638, 359831, 359833, 369112, G02B 718, G02B 1310, G02B 2710, G11B 712

Patent

active

054773865

ABSTRACT:
An optical system of an optical disc apparatus is disclosed for converging and projecting a bundle of rays emitted from a light source onto an optical disc. The optical system includes a collimating lens which collimates the bundle of rays emitted from the light source, two anamorphic prisms for shaping the cross section of the collimated bundle of rays transmitted through the collimating lens, and an objective lens which converges the bundle of rays shaped by the anamorphic prisms onto the optical disc. At least one of the anamorphic prisms is detachably mounted to an immovable body portion of the optical system.

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