| 摘要 |
1,211,077. Optical materials. NATIONAL RESEARCH DEVELOPMENT CORP. Dec.6, 1967 [Dec.9, 1966], No.55201/66. Heading G2J. [Also in Divisions C1 and H1] Synthetic compounds of formula Ag 3 AsS 3 or Ag 3 SbS 3 or solid solutions thereof Ag 3 As x Sb 1 - x S 3 where x is 0-1 are used as optical materials in linear or non-linear devices. IR radiation from a He-Ne gas laser may be focused on a crystal of the material, which doubles the frequency of a portion of the radiation to form the second harmonic. The radiation is then passed through a filter which absorbs the fundamental IR, and the modified portion is detected by a photo-multiplier. The crystal is cut so that its optic axis is parallel to its surface and perpendicular to the optic axis of the laser, and is held in an oven. The material may also be used to make a Wollaston prism. |
