Laser monitoring system and method for optical disk driver
An optical disc drive and monitoring system technology, applied in optical recording/reproducing/erasing methods, beam sources, optical recording heads, etc., can solve the problems of small light quantity and inability to monitor the intensity of laser light correctly, and achieve the effect of accurate monitoring
Inactive Publication Date: 2006-07-05
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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[0004] If it is formed in this way, the existing laser monitoring system uses the laser light passing through the reflector 120 as the laser used in monitoring, so the amount of light is not large, and the light loss through the reflector 120 is added, so in fact the monitoring The laser, that is, is different from the intensity of the laser output to the optical disc 140, and the intensity of the laser cannot be accurately monitored.
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[0032] Hereinafter, embodiments of the laser monitoring system for an optical disk drive and its method according to the present invention will be described in detail with reference to the accompanying drawings.
[0033] First, refer to figure 2 The laser monitoring system of the present invention will be described.
[0034] Here, symbol 200 is the laser monitoring system of the present invention, and symbol 300 is a group of additional devices used in the laser control system of the present invention. First, the laser monitoring system 200 of the technical idea of the present invention will be described in more detail.
[0035] The direction changing part 210 is a hologram (hologram) used by the pick-up device, that is, the laser diode 310 emits a direction changing part in the same direction; The laser light going in the direction is reflected to the direction in which the disc 320 is located.
[0036] At the same time, the light-collecting and monitoring part 230 picks...
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The invention relates to a laser monitoring system and method for a CD driver, comprising: direction change components, making lasers reflected in different direction pass through a collimating lens to make them advance in the same direction; reflecting components, regulating the lasers to pass through an object lens and reflecting them in the direction of the CD in the course of collimating the lasers to make them advance in the same direction; light focusing and monitoring component, from the lasers reflected by the reflecting component, picking up and focusing the lasers reflected to CD record regenerating regions and outputting them into the CD, and additionally, picking up the lasers reflected to monitoring regions and detecting the laser intensity and transmitting the corresponding results to certain laser intensity regulating components. As compared with the existing techniques, the monitoring of the invention is more accurate.
Description
(1) Technical field [0001] The invention relates to an optical disc drive, in particular to a monitoring system and method for the laser of the optical disc drive. (2) Background technology [0002] Generally speaking, the CD-ROM drive laser monitoring system monitors the strength of the laser used to write information or read the written information to CD-R, CD-RW, DVD (Digital Video Disc) recording media, and adjust the light source laser based on the results. The power supply of the diode makes the laser achieve the best state when recording and reproducing information. figure 1 It is a schematic diagram of the existing laser monitoring system. [0003] Same as shown in the figure, the existing laser monitoring system consists of the following devices: a laser diode 100 that generates laser light; a collimating lens 110 that makes the generated laser light incident in a certain direction parallel to a certain direction; parallel light Mirror 120 that reflects in the dir...
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IPC IPC(8): G11B7/004G11B7/125G11B7/126
Inventor 申容甲
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI