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Automatic correction laser measurement device and correction method

A technology of laser measurement and automatic correction, which is applied in optical recording/reproduction, head configuration/installation, instruments, etc., and can solve problems such as increased production costs, attenuation of light detection components, and measurement errors

Inactive Publication Date: 2005-12-07
BENQ CORP
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Problems solved by technology

[0003] However, due to the long-term operation of the laser measuring device, the light detection element will attenuate, and the user cannot predict when the light detection element will start to decay. In addition, the attenuation of the light detection element is irregular and often only The attenuation phenomenon will only occur in the range of light energy, thus causing measurement errors. At present, the general solution is to directly replace the light detection element, but this method will increase the production cost. In view of this, the present invention provides an automatic correction The advanced laser measuring device and calibration method can effectively solve the above problems

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  • Automatic correction laser measurement device and correction method
  • Automatic correction laser measurement device and correction method

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Embodiment Construction

[0023] see figure 1 As shown, it is a preferred embodiment of an automatic calibration laser measuring device of the present invention. The laser measurement device 10 includes: a light detection element 11 , an interface unit 12 , a storage unit 13 , a processing unit 14 and a display unit. The storage unit 13 stores a correspondence table, the correspondence table provides the processing unit 14 to calculate the value of the light energy received by the light detection element 11, and the correspondence table has several preset values, each preset value corresponds to Based on a measured light energy signal and a preset light energy. The optical sensor 11 can receive the preset light energy projected from the outside and convert the preset light energy into a measured light energy and send it to the processing unit 14. After the processing unit 14 receives the measured light energy signal, the processing unit 14 Immediately calculate the value of the preset light energy wi...

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Abstract

This invention relates to an automatic corrected laser method, which caries out automatic calibration with the help of a light source device providing a preset light energy and a data value corresponding to the value. Said laser test device includes a test element and a process unit, the test element receives the preset light energy and turns it to a signal for testing the light energy, the process unit receives said signal and data value to provide a modified data value after a preset operation. This invented method includes: the process unit picks up a preset light energy and its data value to generate a modified data value based on them and compares said modified data value and said preset value to correct said preset value.

Description

technical field [0001] The present invention relates to an automatic calibration laser measuring device and calibration method, in particular to a laser measuring device and calibration method which can automatically correct the laser measuring device by means of a light source device. Background technique [0002] At present, the general optical disc drive manufacturers will use a laser power meter (Laser Power Meter) to test the laser pickup head in the optical disc drive. The laser power meter mainly has a light detection element, which is used to detect The amount of light generated by the CD-ROM, according to the amount of light detected by the laser measuring device, it is judged whether the amount of light generated by the CD-ROM falls within a preset range, so as to adjust the parameters of the CD-ROM, so that the light generated by the adjusted CD-ROM falls within the range within the preset range. [0003] However, due to the long-term operation of the laser measu...

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Application Information

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IPC IPC(8): G11B7/09
Inventor 黄耀正刘兴华
Owner BENQ CORP
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