Cylindrical Immersion Research Articles

Optical joint of optoelectronic radiation converters with immersion light guides and calculation of their characteristics

In the present work, equations are obtained that establish relationships between the optical characteristics of optoelectronic radiation converters and straight cylindrical immersion light guides with straight faces manufactured from isotropic and anisotropic materials with different refractive indices. Engineering procedures to calculate the schemes of optical joint of pyrometric converters with light guides that improve the metrological characteristics of the immersion light-guide thermometry of radiation are developed.

Coating Thickness Measurement by Interferometry*

Thickness measurements of thin transparent coatings on thick transparent bases by reflection interferometry are made possible through use of an immersion medium of the same refractive index as the base to intensify interference. A convenient interferometer comprising three essential parts, a “pocket” spectroscope, an incandescent lamp, and a cylindrical immersion tank, is described. Its use for rapid, precise measurements of thickness of single and double layer coatings and films in the range of 0.2 to 50 microns is illustrated with spectra.