Multi-element grating beam splitter using double refraction to r

Details Multi-element grating beam splitter using double refraction to r Multi-element grating beam splitter using double refraction to r

1996-06-28

1998-01-20

Huber, Paul W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369112, G11B 700

Patent

active

057107530

ABSTRACT:
In an optical system including a multi-element grating beam splitter which includes four separate elements and an optical source with an effective aperture for generating a radiation beam to be applied to a data track of an optical storage medium, optics are disposed between the grating beam splitter and the data track of an optical storage medium which defines an optical axis along which light is projected to the data track and causes the displacement of the return beam to cause it to be substantially outside the effective aperture of the optical source to reduce optical feedback into the optical source.

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patent: 5544143 (1996-08-01), Kay et al.
W. Ophey, "Compact Optical Light Paths," Jpn. J. Apl. Phys., vol. 32, Part 1, No. 11B, pp. 5252-5257, Nov. 1993.
Chapter 26 of F. Jenkins et al, "Fundamentals of Optics," McGraw Hill, New York.
pp. 172-179 of A. Marchant, "Optical Recording: A Technical Overview," Addison-Wesley, Reading, Mass.

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