CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims all benefits accruing under 35 U.S.C. § 119 from China Patent Application No. 201810027425.X, filed on Jan. 11, 2018, in the China National Intellectual Property Administration, the contents of which are hereby incorporated by reference. This application is related to applications entitled, “PLANE SOURCE BLACKBODY”, filed Ser. No. 16/244,449, “BLACKBODY RADIATION SOURCE”, filed Ser. No. 16/244,455, “BLACKBODY RADIATION SOURCE”, filed Ser. No. 16/244,468, “BLACKBODY RADIATION SOURCE”, filed Ser. No. 16/244,474, “PLANE SOURCE BLACKBODY”, filed Ser. No. 16/244,488, “CAVITY BLACKBODY RADIATION SOURCE AND METHOD OF MAKING THE SAME”, filed Ser. No. 16/198,549, “CAVITY BLACKBODY RADIATION SOURCE”, filed Ser. No. 16/198,565, “PLANE SOURCE BLACKBODY”, filed Ser. No. 16/198,577, “CAVITY BLACKBODY RADIATION SOURCE AND METHOD OF MAKING THE SAME”, filed Ser. No. 16/198,590, “CAVITY BLACKBODY RADIATION SOURCE AND METHOD FOR MAKING THE SAME”, filed Ser. No. 16/198,598, and “PLANE SOURCE BLACKBODY”, filed Ser. No. 16/198,606.

FIELD

The present disclosure relates to a blackbody radiation source, especially, relates to a cavity blackbody radiation source.

BACKGROUND

With a rapid development of infrared remote sensing technology, the infrared remote sensing technology is widely used in military fields and civilian fields, such as earth exploration, weather forecasting, and environmental monitoring. All infrared detectors need to be calibrated by a blackbody before they can be used. The higher an effective emissivity of the blackbody, the higher a calibration accuracy of infrared detector. Used as a standard radiation source, a role of blackbody is increasingly prominent. An effective emissivity of a cavity blackbody mainly depends on an opening size of the cavity blackbody, a shape of the cavity blackbody, an emissivity of materials on an inner surface of the cavity blackbody and a isothermal degree inside the cavity blackbody. Therefore, to obtain high performance blackbody radiation sources, it is important to use inner surface materials with high emissivity.

