Laser light source device and image display apparatus

Details Laser light source device and image display apparatus Laser light source device and image display apparatus

H - Electricity

01

S

H01S 5/062 (2006.01)

Patent

CA 2751231

A laser light source device has a laser light source (21) for emitting a laser beam (L), a laser driver (31) for driving the laser light source, a light-collecting lens (24) for collecting the laser beam and reflecting a part of the laser beam, an optical sensor (29) for receiving a reflected laser beam (LS) which has been reflected by the light-collecting lens and outputting a detection signal corresponding to intensity of the reflected laser beam, and a controller (30) for controlling driving of the laser light source by the laser driver (31) in accordance with the detection signal, and the light-collecting lens (24) is disposed in a eccentric-rotated state so that an optical axis of the light-collecting lens (A24) has a tilt (angle .alpha.) with respect to a central ray (L0) of the laser beam (L) being incident on the light-collecting lens.

L'invention porte sur un appareil de source de lumière laser comprenant : une source de lumière laser (21) qui émet une lumière laser (L) ; une unité d'attaque de laser (31) qui attaque la source de lumière laser ; une lentille de focalisation (24) qui focalise la lumière laser et réfléchit une partie de la lumière laser ; un capteur de lumière (29) qui reçoit la lumière laser réfléchie (LS) réfléchie par la lentille de focalisation et délivre un signal de détection correspondant à l'intensité de la lumière laser réfléchie ; et une unité de commande (30) qui commande l'attaque de la source de lumière laser par l'unité d'attaque de laser (31), sur la base du signal de détection. La lentille de focalisation (24) est agencée d'une façon rotative excentrique de sorte que l'axe optique (A24) de la lentille de focalisation est incliné (par un angle a) par rapport au faisceau central (L0) de la lumière laser (L) émise vers la lentille de focalisation.

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