FOCUSING DEVICE FOR HIGH-POWER LASER BEAMS

摘要

FIELD: power laser optics. SUBSTANCE: mirror focusing lens has reflecting mirror made of material transparent on laser beam wavelength with high refraction index; reflecting coating is applied to rear surface being cooled down and front surface of mirror is given anti-reflection coating. With oblique incidence on mirror, angle between incident and reflected beams equals theta. Mirror is wedge-shaped and placed between front flat surface and rear spherical surface at angle of alpha = theta/2n. With normally incident beams, wedge angle is assumed as 0 and curvature radii of front and rear surfaces of mirror relate as R1/R2= n. EFFECT: reduced aberration. 2 dwge