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Laser diode power independent correction method

A laser diode and optical power technology, which is applied in the direction of material analysis, measuring device, suspension and porous material analysis by optical means, can solve the problems of no theoretical basis, prone to large errors, output power attenuation, etc. The effect of strong operability, low cost of use and high accuracy

Active Publication Date: 2017-05-31
榛硕(武汉)智能科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] During the use of existing laser diodes, the laser diode is affected by its own service life. After a period of use, its output power will attenuate to a certain extent. At this time, when the laser diode is used for detection work, it is affected by the output Due to the influence of power attenuation, there will be some errors in the detection data
[0003] However, the existing laser diode power correction methods mostly use changing the circuit at the input end of the laser diode to increase the input power of the laser diode for correction. This method has no theoretical support. After increasing the input power, the laser diode cannot be adjusted. The output power is grasped, and when it is detected, it is prone to large errors, and the effect of power attenuation correction is not good.

Method used

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Embodiment 1

[0037] like figure 1 As shown, a laser diode power autonomous correction method specifically includes the following steps: step (1): sequentially arrange a concave lens and a first photoelectric receiving tube on the optical path of the laser diode emitting laser; step (2): the first photoelectric receiving tube The two sides of the second photoreceiving tube and the third photoreceiving tube are arranged at intervals respectively, and the alignment direction of the first photoreceiving tube, the second photoelectric receiving tube and the third photoreceiving tube are perpendicular to the light path of the laser diode emitting laser light; step (3 ): When the laser diode is turned on, the first photoelectric receiving tube, the second photoelectric receiving tube, and the third photoelectric receiving tube are used to receive the laser light scattered by the concave lens from the laser diode, and the processing module calculates the first photoelectric receiving tube. Optical...

Embodiment 2

[0049] like figure 2 As shown, this embodiment provides a laser diode power autonomous correction method, and the difference from Embodiment 1 is that this laser diode power autonomous correction method also includes step (9): when any two of K1, K2, and K3 are less than 60 %, the processing module recognizes that the laser diode is in an abnormal state;

[0050] The processing module calculates the attenuation coefficient. When the attenuation coefficient is less than 60%, the laser diode is in an abnormal state. Even if the error is compensated by self-correction, it cannot avoid the impact on the final detection result. At this time, the staff can perform replacement or maintenance work , to ensure the normal progress of follow-up work.

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Abstract

The invention discloses a laser diode power independent correction method, which comprises the following steps of step (1), sequentially installing a concave lens and a first photoelectric receiving tube on an optical path of the laser; step (2), installing a second photoelectric receiving tube and a third photoelectric receiving tube at intervals at the two sides of the first photoelectric receiving tube; step (3) calculating the light power P1, the light power P2 and the light power P3; step (4) recording the attenuation light power Pr1, the attenuation light power Pr2 and the attenuation light power Pr3; step (5) calculating the attenuation coefficient of the first photoelectric receiving tube, the second photoelectric receiving tube and the third photoelectric receiving tube; step (6), calculating the respective detection concentration of the first photoelectric receiving tube, the second photoelectric receiving tube and the third photoelectric receiving tube; step (7) calculating the respective detection correction values of the first photoelectric receiving tube, the second photoelectric receiving tube and the third photoelectric receiving tube; step (8) calculating the average detection correction value. The laser diode power independent correction method has the advantages that the operation is convenient; the accuracy is higher.

Description

technical field [0001] The invention relates to the technical field of laser diodes, in particular to a method for autonomously correcting laser diode power. Background technique [0002] During the use of existing laser diodes, the laser diode is affected by its own service life. After a period of use, its output power will attenuate to a certain extent. At this time, when the laser diode is used for detection work, it is affected by the output Due to the influence of power attenuation, there will be some errors in the detection data. [0003] However, the existing laser diode power correction methods mostly use changing the circuit at the input end of the laser diode to increase the input power of the laser diode for correction. This method has no theoretical support. After increasing the input power, the laser diode cannot be adjusted. When the output power is grasped and then detected, large errors are prone to occur, and the effect of power attenuation correction is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06G01N21/53G01N21/01
CPCG01N15/06G01N21/01G01N21/53G01N2021/0112G01N15/075
Inventor 林雅露
Owner 榛硕(武汉)智能科技有限公司
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