Accession Number : AD0844483

Title :   A Laser Interferometer,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s) : Wolinski, W. ; Kazmirowski, A. ; Kowalski, A.

Report Date : 09 JAN 1968

Pagination or Media Count : 10

Abstract : Noting that the optical quality of laser rods is a function of the magnitude of the changes in the index of refraction of the material, the author points out that intermittent refraction index variations may be measured by the scattering method, whereas the most suitable technique for measuring the continuous changes in the index of refraction, which occur in the plane perpendicular to the rod axis is the interference method. A laser interferometer, has been developed for observations of the optical homogeneity of transparent materials, particularly ruby and glass laser rods. The measurement principle and design philosophy of this device are explained. As the light source for the interferometer, a continuous-acting, type LG3B gas laser is used. This laser operates on a wavelength of 0.6328 micrometers, with a resonator in a hemispheric system. The use of this laser light source permits observations of rods up to 250 mm in length, without the need for devices to compensate for differences in the optical paths, and at the same time ensures sufficient image brilliance. (Author)

Descriptors :   *INTERFEROMETERS), (*GAS LASERS, REFRACTIVE INDEX, OPTICAL GLASS, RUBY, POLAND.

Subject Categories : Lasers and Masers
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE