ANGLE-MEASURING DEVICE Russian patent published in 2020 - IPC G01B11/26 G01C21/24 

FIELD: astronautics.

SUBSTANCE: instrument can be used for orientation of spacecrafts. Device comprises a blind, a channel of a geometric reference (CGR) in form of a block of a collimator, comprising an optical element, one of whose surfaces has a convex, and other concave spherical shape, forming telescopic system with angular magnification 0.5^x, a radiation source, a transparent spot diaphragm and a flat mirror mounted on the base plane, as well as a mirror-prism unit for introducing radiation into the receiving device. Optical element is a monolithic part with two parallel flat inclined surfaces with a mirror coating, on the convex surface of which there is a beam-splitter coating. Spot diaphragm is applied on input inclined surface and is optically conjugated with front focus of concave spherical surface at reflection from spherical convex surface. On the input inclined surface in the diaphragm area a rectangular prism is rigidly installed with a hypotenuse face, the input plane of which faces the radiation source is perpendicular to the segment of the optical axis of the optical element located before the input inclined surface.

EFFECT: high accuracy of the device without changing its overall weight characteristics.

1 cl, 6 dwg