Normal temperature point source blackbody

Abstract

The invention discloses a normal temperature point source blackbody which belongs to the field of optical measurement. The normal temperature point source blackbody is technically characterized in that a number of annular drives which are composed of semiconductor refrigeration pieces and radiating pieces are arranged on the outer side wall of a multi prismatic blackbody cavity along the axial direction, so as to realize temperature control on the normal temperature point source blackbody; temperature sensors are uniformly distributed on three different axial positions on the side wall of the blackbody cavity, so that the overall temperature in the blackbody cavity can be accurately controlled; an arc-shaped air inlet and a radiating fan are respectively arranged on front and rear end faces of a chassis, so that an air circulating passage is formed with a void in the chassis; the uniformity of the temperature in the blackbody cavity is ensured; the emission rate of the normal temperature point source blackbody provided by the invention can reach 0.998; the problem of a high emissivity blackbody radiation source required by field test and rapid measurement occasions is solved; and the normal temperature point source blackbody has the advantages of small volume, light weight, fast temperature fluctuation speed and portability.

Description

technical field [0001] The invention belongs to the field of optical metrology and relates to a standard infrared radiation source, in particular to a normal temperature point source black body. Background technique [0002] Generally, the temperature range of normal temperature blackbody is -30℃~100℃. In this temperature range, there are two types of blackbody that can be used as a standard infrared radiation source. One is a normal temperature point source blackbody, and the other is a normal temperature surface source blackbody. . Both SBIR and EOI of the United States have normal temperature point source blackbody products, which include a cylindrical cavity and a liquid circulation component attached to it. The liquid in the liquid circulation component communicates with the external temperature control system through the pipeline, and the external temperature control system The cavity of the black body is heated and cooled by controlling the temperature of the liquid,...

AI Technical Summary

Problems solved by technology

The advantage of this kind of room temperature point source black body is that it has good temperature stability, and its emissivity is usually between 0.997 and 0.999. This kind of normal temperature point source black body is driven by liquid, it takes a long time to reach the set temperature point, and it has a large volume and many accessories, so it is not suitable for carrying and using in the field, and it is not suitable for rapid testing occasions.

Images