Realizing method and device of high precision radiation brightness standard based on standard detector

Abstract

This invention relates to a visible light wave band based on the standard detector high accuracy radiation brightness datum realization means and the equipment. This invention by the low temperature radiation set took the ray radiation flux measurement the primary datum, has used based on the light trap structure multi- wave bands light filter type radiation brightness idea, has realized the low temperature absolute radiac set to the Trap standard detector standard transmission. This invention multi- wave bands light filter type spoke brightness counts the structure compact, long-term stability high, the design has the precise constant temperature control system, may use in the different ambient temperature but the measuring accuracy not being able to reduce, suits extremely as the spoke brightness laboratory datum performs the long-term preservation or took the daily working standard performs to use, is extremely convenient. May reduce the existing spoke brightness datum greatly the uncertainty, has provided set of brand-new mentalities and the method.

Description

technical field [0001] The invention belongs to the technical field of precise measurement of optical radiation in radiometry, and in particular relates to a novel device and method for realizing a high-precision radiance detection reference based on a standard detector. Background technique [0002] Until now, radiance benchmarks have generally been implemented using a radiation source-based approach. The primary standard using this method is based on the absolute black body theory and determined by Planck's law. The working standard in the visible-short-wave infrared band is the radiance standard lamp of various uncertainty levels. According to Planck's black body radiation law, the emission spectral radiance of a black body corresponds to the temperature of the black body at a specific wavelength. The existing radiance benchmark is based on this principle, and the radiance benchmark is established by accurately measuring the temperature of the black body. Therefore, in ...

AI Technical Summary

Problems solved by technology

Therefore, in the process of establishing the primary benchmark of radiance based on high-temperature blackbody (1500K~3200K), the accurate measurement of high-temperature blackbody temperature is the most important uncertain factor.

In fact, the measurement of high-temperature black body temperature is technically difficult, the required equipment is complicated, and the accuracy is difficult to improve. Therefore, the absolute accuracy of the existing primary benchmark of radiance itself is not high, and the uncertainty is large, about It is about 1% to 4%; after multi-level standard transmission, it finally reaches the user's working standard, and its absolute accuracy is even worse, with an uncertainty of about 5% to 10%.

Due to the low accuracy of the existing radiance working standard itself, the further improvement of the measurement accuracy of various types of spectral radiance meters on the market is limited, and the measurement and measurement level of spectral radiance is currently at a low level, seriously constraining The development needs of those industries that require high accuracy of radiance measurement indicators

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