Optical information reproducing apparatus

G - Physics – 11 – B

Patent

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Details

G11B 7/00 (2006.01) G11B 7/12 (2006.01) G11B 7/135 (2006.01)

Patent

CA 2088701

An optical information reproducing apparatus of the invention includes a light emitting and receiving unit and an optical system. The optical system converges light from the light emitting and receiving unit on a recording medium and converges the light after reflected by the recording medium. The light emitting and receiving unit includes: a semiconductor laser device disposed on a substrate for generating light; a photo detector formed, integrally with the substrate, on the substrate on which the semiconductor laser device is disposed, for outputting a signal corresponding to the intensity of light incident thereon; and a beam splitter provided on an optical axis of the reflected light, the beam splitter leading part of the reflected light to the photo detector.

Appareil de reproduction d'information optique comprenant une unité émettrice-réceptrice de lumière et un système optique. Le système optique fait converger la lumière provenant de l'unité émettrice-réceptrice sur un support d'enregistrement de même que la lumière réfléchie par le support d'enregistrement. L'unité émettrice-réceptrice comprend : un laser semi-conducteur situé sur un substrat et servant à générer de la lumière; un détecteur de lumière faisant partie intégrante du substrat sur lequel se situe le laser et destiné à émettre un signal correspondant à l'intensité lumineuse qui l'atteint; et un diviseur de faisceau disposé dans l'axe optique de la lumière réfléchie et servant à diriger une partie de cette lumière sur le détecteur de lumière.

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