PLAN-ACHROMATIC QUARTZ-FLUORITE MICROSCOPE LOW MAGNFICATION LENS Russian patent published in 2013 - IPC G02B21/02 G02B9/16 G02B11/08 

FIELD: physics.

SUBSTANCE: lens has three components; the first component with optical power φ₁ is in form of a biconvex lens, the second component with optical power φ₂ is in form of a biconcave lens and the third component with optical powerφ₃ is in form of a biconvex lens. The first and third components are made from fluorite and the second component is made from quartz glass. The ratio of optical power values of the components to the optical power of the entire lens φ_len satisfies the following relationships: 1.5<φ₁/φ_len<2; |4|<φ₂/φ_len<|5|; 2<φ₃/φ_len<3, and the ratio of radii of cavature has the following values: in the first component - |1.5|<R₁₁/R₁₂<|2.5|; in the second component - |0.3|<R₂₁/R₂₂<|0.7|; in the third component - |0.8|<R₃₁/R₃₂<|1.7|, where: R is the radius of the spherical surface, φ=1/f', f' is focal distance.

EFFECT: longer operating distance, thereby enabling operation with thick cuvettes in translucent light and with manipulators in reflected light, improved image quality in the entire field of view and providing a permissible small coefficient of illumination.

1 dwg, 1 app