Optical head receiver

Details Optical head receiver Optical head receiver

G - Physics

11

B

352/32.21

G11B 7/00 (2006.01) G02B 27/16 (2006.01) G11B 7/08 (2006.01) G11B 7/09 (2006.01) G11B 7/135 (2006.01)

Patent

CA 1177165

OPTICAL HEAD DEVICES ABSTRACT OF THE DISCLOSURE An optical head device for generating and controlling a light beam comprises a cylindrical supporting member, a semiconductor laser contained in the supporting member for generating a laser light beam and a hologram operative to convert a spherical light wave diverging from one point into another spherical light wave converging to another point, such hologram being attached to the cylin- drical supporting member so that the laser light beam gener- ated by the semiconductor laser passes through the hologram in the direction along the axis of the cylindrical supporting member. A beam splitter and a photo-sensor may also be contained in the cylindrical supporting member at positions between the semiconductor laser and the hologram.

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