TELESCOPE Russian patent published in 2016 - IPC G02B23/00 

FIELD: test and measurement equipment.

SUBSTANCE: invention relates to instrumentation, namely, to telescopic optical systems used for sight axes parallelism measurement of two or more controlled optical systems in visible spectrum range. Telescope consists of spherical concave mirror, eyepiece, two plane-parallel plates, on one side of each of them grids with strokes are located, wherein on each grid only one stroke is applied passing through plane-parallel plate center. Plane-parallel plates are arranged between spherical concave mirror and eyepiece with air gap between them, where eyepiece front focus is located. Grids with strokes face each other and each grid with stroke is arranged with possibility to displace perpendicular to applied stroke in planes, perpendicular to telescope optical axis so that when viewed in eyepiece reticle is visible formed by two movable grids strokes. Between grids fixed field stop is also located, limiting telescope field of view.

EFFECT: technical result is creation of telescope, which allows to measure sight axes parallelism of two or more controlled optical systems with simple design.

1 cl, 1 dwg