Laser & Optoelectronics Progress, Volume. 59, Issue 1, 0112002(2022)
Calibration Method of Pinhole Aperture Attenuation in Reflectance Transfer Spectrometer
Fig. 1. Experimental setup for laser nonlinearity measurement[15]
Fig. 2. Calibration diagrams of pinhole aperture attenuation factor. (a) Spectral radiance of high luminance source and response of the reflectance transfer spectrometer with a pinhole aperture are measured; (b) spectral radiance of low luminance source and response of the reflectance transfer spectrometer without a pinhole aperture are measured
Fig. 3. Spectral radiance of integrating sphere light source measured by wide dynamic spectrometer. (a) High luminance; (b) low luminance
Fig. 4. Measurement results of pinhole aperture attenuation factor. (a) Signal value of reflectance transfer spectrometer; (b) pinhole aperture attenuation factor calculated from Eq. (13)
Fig. 5. Experiment diagram of measuring reflectance outdoor. (a) Directly imaging the solar; (b) observing the white diffusing plate
Fig. 6. Experimental test results. (a) Oversampled image of the solar disk; (b) spectral response of reflectance transfer spectrometer to solar and diffuse reflector
Fig. 7. Influence of non-full-aperture imaging on the uniformity of attenuation factor
Fig. 8. Results of non-uniformity correction. (a) Ratio of solar response signal of reflectance transfer spectrometer to white diffusing plate response signal; (b) normalized result of ratio non-uniformity corrected by pinhole aperture attenuation factor
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Feng Jiang, Xinhua Niu, Kai Yin. Calibration Method of Pinhole Aperture Attenuation in Reflectance Transfer Spectrometer[J]. Laser & Optoelectronics Progress, 2022, 59(1): 0112002
Category: Instrumentation, Measurement and Metrology
Received: Mar. 18, 2021
Accepted: Apr. 22, 2021
Published Online: Dec. 23, 2021
The Author Email: Niu Xinhua (nxh@mail.sitp.ac.cn)