Refractive Index Of Infrared Optical Materials Testing Technology Research

This article sets out from the practical requirement of application, through investigation and research, demonstration, look up relative files, and compare to various kinds of schemes in existence, the article puts forward the technology scheme of project manufacture about refractive measurement instrument. The system is make up of source system, collimator system, testing angle system, aiming system, signal processing system, and so on.According to the selection of principle scheme, we analyze the main technology of the instruments, which the key is the accurate measurement about angle. For this purpose, first of all, we select the high accuracy of the angle measurement system as basic components. Due to the divisible of the signal wave band, we need p hotoelectricity measurement, auto aiming. This article skillful use the method of vibrating slit aim, through self-programming procedure and aiming system with step-motor control and signal processing system, we have settled the high accuracy aiming about the angle measurement of infrared signal, and the accuracy of the angle measurement have reached 1 " . During the measurement of refractive about many kinds of material, we analyze the influence of wavelength, temperature index, pressure and sample surface shape for refractive, through analyze the result of measurement, and estimate the uncertainty of measurement, the expand uncertainty of this instrument is 2 X 10~4. at the 8 m wave length, it's satisfied to the requirement of internal user, achieve the advance level of the same kind of the instrument in the world.