Auto collimator rotation measuring process - uses afocal optical system having unity magnification placed in optical beam of mirror and auto-collimator

摘要

This process of remote precision measurement of angles uses at least one afocal optical system with unity magnification, acting as a pupillary relay (RP), to transfer the pupil. The apots. includes a mirror (M) whose rotation angle is measured using an autocollimator (A), being mirror (M) is placed in the output pupil of the pupillary relay (RP). The pupillary relay (RP) comprises four identical lenses (L1, L2, L3, L4) aligned in a tube. The mirror (M) is placed in the furthermost focal point (F'4) of the last lens (L4). The autocollimator (A) is centered on the axis of the pupillary relay (RP). The pupillary relay (RP) transfers optically the mirror (M) from the output focal point (F'4) to the input focal point (F1). This permits the conversation of a large angular field for a distant mirror.