| 摘要 |
FIELD: gradient optics. ^ SUBSTANCE: gradient lens can be also used in fiber optics and optical instrument engineering. Gradient lens has thickness d along its optical axis z. Lens is limited by first convex refracting surface of rotation with generator y1(z) and by second concave refracting spherical surface with radius R2. Lens has spherical-concentric distribution of refractivity in material of lens, which distribution is defined by formula of n(x, y, z) =n0/f (√x2+y2+ (z-f) 2), where n0 is refractivity at vertex of first refracting surface; f=d+s' which has to be distance from vertex of first surface to center of spherical-concentric distribution of refractivity; s'=R2 which has to be rear cut. Center of spherical-concentric distribution of refractivity coincides with center of second surface at optical; axis. Generator of first refracting surface in plane, which goes through center of spherical-concentric distribution of refractivity, is defined by relation of y2 1=-z2+2fz+2f/n0 2((n0s+f)-√2n0 2(f+s)z+(n0s+f)2), where s if front cut. Lens converts entrance divergent homocentric beam from object being at specific distance from axis, into exit convergent homocentric beam, which is focused in center of distribution of refractivity. ^ EFFECT: improved exploitation capabilities. ^ 2 dwg, 1 ann |
