Optical source module with two wavelengths and optical pickup ap

Details Optical source module with two wavelengths and optical pickup ap Optical source module with two wavelengths and optical pickup ap

1998-04-01

2000-03-28

Spyrou, Cassandra

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 1, 359 27, 369109, 369103, G02B 532, G03H 100, G03H 102, G11B 700

Patent

active

060439114

ABSTRACT:
A light source module with two wavelengths that is adapted to generate laser beams different in wavelength. In the light source module, a hologram optical element (HOE) is used to allow a first laser beam generated at a first light source and a second laser beam generated at a second light source to progress along same path. The HOE diffracts the second laser beam to change a progressive path of the second laser beam into that of the first laser beam. The first light source generates the first laser beam having a different wavelength from the second laser beam generated at the second light source.

REFERENCES:
patent: 5025488 (1991-06-01), Yeh et al.
patent: 5696749 (1997-12-01), Brazas et al.

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