Linear Calibration of Wide Dynamic Range Response of Silicon Detectors Based on Double LEDs Light Source Integrating Sphere

Hui, 刘辉 Liu; Hongyao, 陈洪耀 Chen; Xiaolong, 司孝龙 Si; Liming, 张黎明 Zhang

doi:10.3788/aos201737.0904001

Cited by 3 publications

(2 citation statements)

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“…We compared this phototube with the reference S2281 silicon detector with a known linearity. The linearity of the Si detector, ranging from 1 × 10 −8 A to 2 × 10 −6 A, was better than that (4 × 10 −4 ) obtained through direct measurements [13]. Our measurement method is based on a comparison between the phototube under test and the reference detector with an absolute calibrated linearity.…”

Section: Linear Measurement Of the Phototubementioning

confidence: 92%

Spectral radiance standard transfer for an integrating sphere as a radiation source in the ultraviolet band

Chen

Zhang

et al. 2022

Metrologia

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We developed a new source, having uniform spectral radiance, for a large-aperture UV integrating sphere with pressed polytetrafluoroethylene coating. Since lamp panel systems have high uncertainty due to a low signal-to-noise ratio at 250 nm, to transfer the spectral radiance scale from 250 to 350 nm to the source, we developed and calibrated a filter radiometer based on a solar blind phototube. The spectral radiance was obtained via a model of the source and a recursive estimation of the model parameters. A standard FEL lamp validated the usage of the filter radiometer. Finally, the filter radiometer to calibrate the new source. The results show that the radiance of the source at 250 nm is five times the top-of-the-atmosphere spectral irradiance, and the expanded uncertainty is 4.7%.

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Section: Linear Measurement Of the Phototubementioning

confidence: 92%

Spectral radiance standard transfer for an integrating sphere as a radiation source in the ultraviolet band

Chen

Zhang

et al. 2022

Metrologia

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“…where C n represents the nth order corresponding to the nonlinear correction factor and ε represents the nonlinearity uncertainty. The calculation steps for C n are described in detail in [30].…”

Section: Linearitymentioning

confidence: 99%

High Accuracy Solar Diffuser BRDF Measurement for On-Board Calibration in the Solar Reflective Band

Zhang,

Chen,

Huang

et al. 2023

Remote Sensing

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In the solar reflective band, an on-board calibration method based on a solar diffuser (SD) can realize full aperture, full field of view, and end-to-end absolute radiometric calibration of optical remote sensors. The SD’s bidirectional reflectance distribution function (BRDF) is a key parameter that affects the accuracy of the on-board calibration. High-accuracy measurement of the SD BRDF is required in the laboratory before launch. Due to the uncertainty of the goniometer system, polarization effects, and other factors, the measurement uncertainty of the SD BRDF at large incident angles is much higher than that at a 0° incident zenith angle and 45° reflection zenith angle. In this paper, an absolute BRDF measurement facility is reported. The goniometric system consists of a high-brightness integrating sphere as a radiation source, a six-axis robot arm, and a large rotation stage. The measurement wavelength range was from 350 nm to 2400 nm. An improved data processing method based on the reciprocity theorem was proposed to reduce the measurement uncertainty of the SD BRDF at large incident angles. At an incident zenith angle of 75°, the improved data processing method reduced the measurement uncertainty of the SD BRDF by 52% at 410 nm to 480 nm, by 70% at 480 nm to 1000 nm, and by 20% at other bands compared to the absolute measurement method. The influence of the radiation source, goniometer system, detection system, and other factors on the measurement uncertainty are analyzed in this paper. The results show that the measurement uncertainty (coverage factor k = 2) of the SD BRDF was better than 1.04% at 350 nm to 410 nm, 0.60% at 410 nm to 480 nm, 0.43% at 480 nm to 1000 nm, and 0.86% at 1000 nm to 2400 nm.

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日盲型光电管探测系统响应非线性间接法标校

Cao Hanhui,

Chen Hongyao,

Huang Wenxin

et al. 2024

光学学报

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Linear Calibration of Wide Dynamic Range Response of Silicon Detectors Based on Double LEDs Light Source Integrating Sphere

Cited by 3 publications

References 0 publications

Spectral radiance standard transfer for an integrating sphere as a radiation source in the ultraviolet band

Spectral radiance standard transfer for an integrating sphere as a radiation source in the ultraviolet band

High Accuracy Solar Diffuser BRDF Measurement for On-Board Calibration in the Solar Reflective Band

日盲型光电管探测系统响应非线性间接法标校

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