ACHROMATIC LENS FOR GREAT MAGNIFICATION MICROSCOPE Russian patent published in 1997 - IPC

FIELD: large-scale production of microscopes. SUBSTANCE: device has frontal member which is designed as first position flat-convex or meniscus lens and second positive meniscus. Convex region of both lenses are directed towards image. In addition device has two double-glued lenses, which convex region of positive members is directed towards image. In addition device has last member which is designed as single meniscus which concave region is directed towards image. It conforms to conditions . Focal length of first lens of front member is equal to , where R1, R2, D, Ye are respectively curvature radiuses, depth and dispersion coefficient of last member. In addition device may have additional aperture which opening diameter is equal to diameter of lens output aperture. Distance between this additional aperture and last member is varied in range of . EFFECT: increased functional capabilities. 2 cl, 1 dwg