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A Method of Obtaining Correction Factors of Different Wavelengths of Laser Power Meter

A technology of laser power meter and correction coefficient, which is applied in photometry, optical radiation measurement, and photometry using electric radiation detectors, etc., can solve problems such as large economic burdens, expand the working range, reduce calibration costs, and avoid The effect of limitations

Inactive Publication Date: 2018-01-23
北京市计量检测科学研究院
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Problems solved by technology

This is difficult to achieve. On the one hand, due to the limitation of experimental conditions, a laser source usually outputs laser light with one or two wavelengths. Generally, the standard device for calibrating laser power meters cannot be equipped with many laser sources.
On the other hand, it will also cause a great economic burden to the client of the calibrated instrument

Method used

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  • A Method of Obtaining Correction Factors of Different Wavelengths of Laser Power Meter
  • A Method of Obtaining Correction Factors of Different Wavelengths of Laser Power Meter
  • A Method of Obtaining Correction Factors of Different Wavelengths of Laser Power Meter

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Embodiment Construction

[0008] 1. If figure 1 As shown in , measure the same stable laser source, compare the indicated value of the standard power meter with the indicated value of the calibrated power meter, and obtain the correction factor K of the calibrated power meter under the light source of this wavelength λm =P λm Indication of standard power meter / P λm Indicated value of the calibrated power meter;

[0009] 2. If figure 2 As shown, the wide-spectrum stable light source outputs monochromatic light of different wavelengths through the monochromator, and the output current values ​​of the standard detector and the detector of the calibrated power meter at different wavelengths are measured respectively, and the output current values ​​of the detector of the calibrated power meter at different wavelengths are obtained. The following spectral response curve S(λ)=I(λ) is calibrated output current / I(λ) standard output current;

[0010] 3. In such as image 3 Find the measured wavelength poi...

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Abstract

The invention discloses a method for obtaining the correction coefficient of the different wavelengths of a laser power meter. According to the method, firstly, the correction coefficient under a certain wavelength of a power meter is measured. In combination with the corresponding curve of the spectrum of the power meter detector, the correction coefficient of the power meter of different wavelengths can be obtained so that the correction coefficient can be applied for the precise measurement of laser power of various wavelengths within its application scope. The research achievement of the invention resides in that through the use of the method for obtaining the correction coefficient for a laser power meter under different light sources, the calibration workload under different wavelengths is reduced and the cost in doing so is also reduced. As a result, the limitation that the method can only be applied to calibrate the designated wavelength is overcome, making the method capable of performing measurement precisely in more areas. This also makes up the shortage of currently limited number of calibration laser sources, opens the possibility for precise measurement of new type wavelength laser sources and blazes a new path in precise measurement field of laser power.

Description

technical field [0001] This patent is a method for obtaining correction coefficients of different wavelengths of a laser power meter, which is mainly used in the field of measurement and detection and the field of strict precision measurement. Especially in the fields of ophthalmic laser, cosmetic laser, military laser and laser precision processing where the accuracy of laser power is very high, the calibration measurement of laser power meter is very important in the process of measuring laser power. Background technique [0002] A laser power meter is an instrument used to measure the power of a laser source. Before making precise measurements, it is generally necessary to calibrate the power meter in the metrology and testing department to ensure the accuracy of the test results. Usually, for a stable laser source of a certain wavelength, the ratio of the measured value of the standard power meter to the measured value of the calibrated power meter is used as the correc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/02G01J1/42G01J3/28
CPCG01J1/0295G01J1/4257G01J3/28
Inventor 贾亚青陈赤孙向林张建亮崔磊
Owner 北京市计量检测科学研究院
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