ANGLE MEASUREMENT DEVICE Russian patent published in 2012 - IPC G01B11/26 G01C1/00 G01C21/24 

FIELD: measurement equipment.

SUBSTANCE: angle measurement device comprises a lens hood, a channel of a non-detuned geometric reference in the form of a lighting unit, a unit of a beam divider, a flat mirror installed on a basic plane and a non-detuned mirror-prism unit, a lens, a photodetector and a computing unit. The beam divider unit - an optical element glued from a lens and mirror-lens system, in the area of gluing producing an inclined beam-dividing face, in which: the first input surface is arranged in the lens system and is arranged as flat with a dot diaphragm applied on it; the second output surface is arranged in the mirror-lens system is arranged as flat with an adhered plano-convex lens with a mirror spherical surface, at the same time the second surface is input for radiation reflected with the mirror spherical surface; the third output surface is arranged in the mirror-lens system, is arranged in the form of a concave spherical surface, the front focus point of which is matched with the image of the dot diaphragm from the mirror spherical surface, at the same time the third surface is also an input surface for radiation reflected with a flat mirror; the fourth output surface in the lens system is a convex spherical surface. For radiation reflected with a flat mirror, the third and fourth surfaces operate as a telescopic system with angular magnitude of 0.5^x.

EFFECT: higher accuracy of a device without complication of its design.

5 dwg