Search academic texts

Information × Registration Number 0208U000876, 0107U005773 , R & D reports Title Development of express methods of nondestructive diagnostics of the value of directional transmission of infrared emission in germanium crystals popup.stage_title Head Singaivsky Oleksandr Fedorovych, Registration Date 21-02-2008 Organization Institute of Semiconductor Physics of NAS of Ukraine popup.description2 The original method and apparatus and for the express quality diagnostics of the optical material single crystals by measuring the directed transmission of infrared radiation are developed. Degree of accuracy, reliability and speed of measurements of the method developed have proved to be better as compared with the known methods for diagnostics of the infrared optical materials and can be used both in scientifical laboratories and in the industrial facilities. Using the method developed, the scattering of infrared radiation in the germanium crystals grown in our laboratory by the original technology, has been measured. It is shown, in particular, that, in the 20 to 70-mm-diameter crystals, the value of radiation scattering at the 3,0-10,6 ?m range is within 1,5-2,5 % over the whole crystal length. Those values are close to the lowest limit of values observed in the optical germanium elsewhere. Product Description popup.authors popup.nrat_date 2020-04-02 Close