OPTICAL SYSTEM Russian patent published in 2011 - IPC G02B23/00 G02B15/14 

FIELD: physics.

SUBSTANCE: system has a long-region pancratic system, the first component of which has a fixed positive meniscus whose concave surface faces the object space, and a biconcave lens, a biconvex lens and a negative meniscus in front of the positive meniscus, the convex surface of said negative meniscus facing the object space, and the second component comprises two biconcave lenses and the third has a biconvex lens. The second and third components are movable. The system has a near-region pancratic system connected to a telescopic system by a first pair of parallel reflectors. The near-region pancratic system is parallel to the long-region pancratic system and is connected to it by a second pair of parallel reflectors, the first of which can be moved out of the beam path. The near-region pancratic system has three components, the first being a biconvex lens, the second being a biconcave lens and the third being a convergent lens which is immovable and comprises a negative and a positive meniscus whose concave surfaces face the object space. The first and second components can be moved along an optical axis. The focal distances of the components of the pancratic system are linked by relationships given in the claim.

EFFECT: increase in magnification of the system while reducing the total length of the system and the value of displacements of the movable components.

2 cl, 1 dwg