| 摘要 |
PURPOSE:To obtain an optically uniform optical element of lead molybdate single crystal having improved light transmission efficiency of laser on the short wavelength side, by cutting out the single crystal grown from a single crystal lump of lead molybdate as a starting material. CONSTITUTION:A single crystal of lead molybdate which does not generate striae and foggy bubbles is grown from a single crystal lump of lead molybdate as a starting material in a platinum crucible or the like by selecting adequately the conditions such as the pulling-up velocity, the number of revolutions of the crystal. The single crystal is cut to an adequate size and the laser transmitting surface is specularly polished to obtain an optical element. Due to the absence of foggy bubbles in the single crystal, the optical element has the superior efficiency of light transmission at the short wavelength side. |
