Abstract

Surface roughness and surface oxides modify the thermal radiation properties of dark nonoxide compounds. Surface roughness results in the trapping of impinging light, thereby decreasing the specimen reflectance. At most, the observed differences in reflectance amount to about 10%. Surface oxide layers cause even larger changes, often amounting to 15% of reflectance. Thin oxide layers, of the order of 100 mμ, modify the thermal radiation properties in accordance with the properties of interference films. Thicker oxide layers, of the order of 1000 mμ, may also contribute their bulk thermal radiation characteristics. Heated nonoxide compounds are easily oxidized by trace amounts of oxygen present in inert atmosphere or high vacuum. It therefore becomes extremely difficult to completely eliminate surface oxidation during high-temperature emittance measurements.

© 1966 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Structural characterization and lifetime stability of Mo/Y extreme-ultraviolet multilayer mirrors

Benjawan Kjornrattanawanich and Saša Bajt
Appl. Opt. 43(32) 5955-5962 (2004)

Comparative analysis of oxidation methods of reaction-sintered silicon carbide for optimization of oxidation-assisted polishing

Xinmin Shen, Yifan Dai, Hui Deng, Chaoliang Guan, and Kazuya Yamamura
Opt. Express 21(22) 26123-26135 (2013)

Spectral Emittance of Refractory Materials

Henry H. Blau and John R. Jasperse
Appl. Opt. 3(2) 281-285 (1964)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (13)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription