Principles of design of an optical/digital system for the high-temperature melt interfacial tension measurement

摘要

The optical-digital systems find more and more broad applicaiton in scientific researches and productions. In particular the researches of the cpaillary characteristics of materials with the purpose of development of effective solders to design compounds metal - ceramics execute on special techniques in the high-temperature (700-1100 deg C) vacuum installations (3 10~-3 P) (1). The specifity of such researches requires the use of remote methods for determination of the characteristics of materials (factor of surface tension and angle of wetting). The indicated characteristics of materials are determined through geometric images of drops of melts registered and processed by optical-electron and optical-digital systems (2,3). The modern optical-digital systems for registration and image processings are created on the basis of photoreceiversor devices with charging connection (CCD-lines, CCD-matrixes and CCD-video cameras) and personal computer. Use and development of such digital systems has raised the question on choosing of opticla system elements with the goal of optimization of their parameters and increase of accuracy of determination of the objects geometric sizes.