Target simulating and auto-collimating optical instrument

Claim 1

A TARGET SIMULATING AND AUTO-COLLIMATING INSTRUMENT COMPRISING: A COLLIMATOR DEFINED BY AN L-SHAPED TUBE HAVING AN APERTURE PORTION CONTAINING A FOCAL TARGET APERTURE AND A LENS PORTION CONTAINING AN OBJECTIVE LENS, A REFLECTOR POSITIONED AT THE JUNCTION OF SAID PORTIONS OF SAID L-SHAPED TUBE, A VIEWER IN SAID APERTURE PORTION POSITIONED PROXIMATE TO SAID FOCAL TARGET APERTURE, SAID VIERWER COMPRISING AN EYEPIECE LENS AND ASSOCIATED RETICLE WITH AN OPTICAL AXIS AT AN ANGLE TO THE LONGITUDINAL AXIS OF SAID APERTURE PORTION, A SLEEVE FITTING OVER SAID LENS PORTION AND HAVING AN ORTHOGONALLY RELATED EXTENSION WITH A SKYLIGHT THEREIN, A VARIABLE LIGHT SOURCE PROVIDED AT SAID FOCAL TARGET APERTURE, A REFLECTOR MOUNTED ON SAID EXTENSION OF DIRECT SKY BEAMS THROUGH SAID SKYLIGHT, A PENTAREFLECTOR POSITIONED IN SAID SLEEVE BETWEEN SAID COLLIMATOR AND EXTENSION TO CONTINUE LIGHT THEREHTROUGH; A BEAM SPLITTER SECURED IN SAID COLLIMATOR BETWEEN SAID FOCAL TARGET APERTURE AND VIEWER TO AFFORD AUTO-COLLIMATING ADAPTION; AND A REMOVABLE BEAM SPLITTER MOUNTED IN SAID EXTENSION BETWEEN SAID COLLIMATOR AND SKYLIGHT TO SIMULTANEOUSLY PASS AND REFLECT LIGHT FROM SAID COLLIMATOR AND SKYLIGHT RESPECTIVELY THROUGH SAID EXTENSION THEREBY PRESENTING A SIMULATED TARGET STAR ON A SKY BACKGROUND.