Complex lens with diffraction grating

Details Complex lens with diffraction grating Complex lens with diffraction grating

1993-08-26

1995-12-05

Epps, Georgia Y.

Optical: systems and elements

Diffraction

From grating

359566, 359571, 359574, 359741, 357742, 369109, G02B 518, G02B 308

Patent

active

054734711

ABSTRACT:
A complex lens of one-piece construction has first and second lens surfaces opposite to each other. At least one of the first and second lens surfaces of the complex lens is integrally formed with a diffraction grating. This diffraction grating has a multiplicity of substantially parallel grating grooves each being of a generally triangular, sinusoidal or trapezoidal cross-section. An optical head utilizing the complex lens is also disclosed.

REFERENCES:
patent: 4161040 (1992-11-01), Yokoyama et al.
patent: 4545646 (1985-10-01), Chern et al.
patent: 4968117 (1990-11-01), Chern et al.
patent: 5066138 (1991-11-01), Toide et al.
patent: 5111448 (1992-05-01), Komma et al.
patent: 5161057 (1992-11-01), Johnson
patent: 5260828 (1993-11-01), Londono et al.
G. Bouwhuis, et al., Principles of Optical Disc Systems, Chapter 2, pp. 70-75, Published by Adam Hilger, 1985.

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