SPECTRAL SEPARATION COMPONENT WITHOUT VISIBLE PARASITE IMAGE Russian patent published in 2017 - IPC G01J3/12 G02B27/10 

FIELD: physics.

SUBSTANCE: spectral separation component has two sides - a flat front side containing a dichroic coating, and a rear side. The rear side is convex and forms a cylindrical surface defined by a generator of a fixed direction, moving perpendicularly along an arc of a circle containing two ends. The plane passes through these two ends and is parallel to the generator of the cylindrical surface forming a dihedral angle with the plane of the front side forming a cylindrical surface parallel to the edge of the dihedral angle.

EFFECT: suppression of parasitic light.

10 cl, 16 dwg