| 摘要 |
binocular reading of text over entire width of line without movement of magnifier along line. SUBSTANCE: proposed magnifier has two mirrors coming in the form of stretched rectangles which long sides are parallel one another. Both mirrors are concave and are installed according to Z-shaped circuit. Curvatures ρ1 and ρ2 and distance d between them satisfy conditions ρ2 = (0,0015-0,0020)G; ρ1/ρ2 = 0,2-0,3; , where G is magnification of magnifier; ρ1 is curvature of mirror turned to eye of viewer. EFFECT: improved quality of image thanks to reduced astigmatism and coma of decentering. 2 dwg _ |
