A Spectrometer-Based Visual Function Correction Method for Visible Light Detectors

Abstract

The invention discloses a visible light detector visual function correction method based on a spectrometer. The method comprises the steps of obtaining an error correction coefficient eta of a visualresponse curve V'(lambda) of a visible light detector according to a spectral curve S(lambda) and a standard visual function curve V(lambda ) of visible light; correcting the visual response curve V'(lambda) of the visible light detector according to the error correction coefficient eta; and obtaining a second brightness value S'a detected by the visible light detector, wherein the second brightness value S'a is close to a practical brightness value of the visible light relative to a first brightness value Sa which is directly detected on the visible light detector. The visual function of thevisible light detector corresponds to the visual response curve V'(lambda). The visual response curve V'(lambda) of the visible light detector is corrected according to the error correction coefficient eta. The deficiency that in the prior art, a correction error is relatively great due to the fact that superposed correction is carried out on the visual function through utilization of glass sheets with different transmittances when a light source is detected through utilization of the light detector is solved, and the deficiency that a measurement result is instable when brightness of the light source is measured through utilization of the spectrometer is also solved.

Description

technical field [0001] The invention relates to the technical field of light measurement, in particular to a spectrometer-based visual function correction method for a visible light detector. Background technique [0002] The current method of measuring the brightness and luminous flux of a light source is to use a visible light detector to measure the light source. The disadvantage is that the correction error of the visual function is large. At present, the correction of the visual function of the light detector is done by using glasses with different transmittances. Because the thickness and material of the glass sheet will affect the correction, the visual function measured by the visible light detector often has a large error, and the visible light detector with high precision and small error is expensive and difficult to produce; another One method is to use a spectrometer to measure the brightness and luminous flux of the light source. Since the spectrometer collects ...

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Problems solved by technology

[0002] The current method of measuring the brightness and luminous flux of a light source is to use a visible light detector to measure the light source. The disadvantage is that the correction error of the visual function is large. At present, the correction of the visual function of the light detector is done by using glasses with different transmittances. Because the thickness and material of the glass sheet will affect the correction, the visual function measured by the visible light detector often has a large error, and the visible light detector with high precision and small error is expensive and difficult to produce; another One method is to use a spectrometer to measure the brightness and luminous flux of the light source. Since the spectrometer collects the light source through an optical fiber, the light-gathering surface of the spectrometer is small, and the position deviation of the light source will directly lead to a large deviation of the measurement data, resulting in unstable measurement results.

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