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Handheld optical source color illumination spectral measuring instrument for optimizing cosine response design

A technology of response design and measuring instruments, which is applied in the direction of color measurement devices, color measurement using electric radiation detectors, spectrum investigation, etc., and can solve the problems that cannot meet the requirements of cosine response error, etc.

Active Publication Date: 2014-09-24
HANGZHOU CHNSPEC TECH
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  • Application Information

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Problems solved by technology

The measured cosine response data such as Figure 4 As shown, the error f of the cosine response 2 If it is greater than 10%, it cannot meet the requirements of the error of the cosine response of the instrument in the national verification regulations JJG245-2005 or JISC1609-1-2006

Method used

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  • Handheld optical source color illumination spectral measuring instrument for optimizing cosine response design
  • Handheld optical source color illumination spectral measuring instrument for optimizing cosine response design
  • Handheld optical source color illumination spectral measuring instrument for optimizing cosine response design

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Embodiment Construction

[0099] The present invention will be further described below in conjunction with accompanying drawing.

[0100] In order to make the hand-held light source color illuminance spectroscopic measuring instrument capable of measuring the spectral distribution of the measured light source and have better cosine response characteristics at the same time, the present invention proposes a new design idea and adopts a dual-sensor design. One way uses a split light path combined with an array sensor to measure the spectral distribution of the measured light source. The other way uses a silicon photodiode as a sensor device to detect the signal of the light source under test at the same time. The measurement result of the spectrometer is corrected by the measurement result of the silicon photodiode, and the cosine characteristic of the measurement result is improved.

[0101] The optical path of the measuring instrument is designed as follows: Figure 5 As shown, a hemispherical shell-...

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Abstract

The invention discloses a handheld optical source color illumination spectral measuring instrument for optimizing the cosine response design. A dual-sensor design is adopted, on one channel, a spectrum sensor is used to measure the spectrum distribution of a measured optical source; and on the other channel, a silicon photodiode is used as the sensor element to detect a measured optical source signal at the same time. The measurement signal of the silicon photodiode is used to correct the measurement result of the spectrum signal to improve the cosine characteristic of the spectrum signal measurement result. The handheld optical source color illumination spectral measuring instrument for optimizing the cosine response design of the invention adopts two sampling modes at the same time: in one sampling mode, the silicon photodiode is used as the sensor element to perform photoelectric integral measurement; and in the other sampling mode, the spectrum sensor element is used to perform spectral measurement. A hemispherical cosine corrector made from the polytetrafluoroethylene material is used. A mathematical model is established, and comprehensive operation is performed on the two sampling results on algorithm.

Description

technical field [0001] The invention relates to the technical field of color illuminance measurement, in particular to a hand-held light source color illuminance spectroscopic measuring instrument with optimized cosine response design. Background technique [0002] Similar to the measurement of the reflected color of an object, there are two types of measurement of the radiation intensity and color properties of the light source: photoelectric integral and spectroscopic. Photointegral measurements are methods that use filters to match the relative spectral response of the instrument. In the design of the color filter, the relative spectral transmittance of the color filter should meet the requirements of formula (1): [0003] [0004] Formula 1) [0005] [0006] In the formula, Observer response curve for CIE1931 standard chromaticity, such as figure 1 shown; [0007] , Respectively, the relative spectral transmittance of the color filter; [0008] is...

Claims

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Application Information

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IPC IPC(8): G01J3/28G01J3/50
Inventor 袁琨
Owner HANGZHOU CHNSPEC TECH