Sunlight-filtering ocular adapter for telescopes

Claim 1

A SUNLIGHT-FILTERING OCULAR ADAPTER FOR TELESCOPES, SAID ADAPTER COMPRISING A TUBULAR HOUSING HAVING A MAJOR AXIS, A PLANAR GREEN GLASS FILTER FOR FILTERING OUT HARMFUL ULTRA-VIOLET AND INFRARED RAYS, SAID GREEN GLASS FILTER BEING MOUNTED WITHIN SAID HOUSING WITH THE OPTICAL AXIS OF SAID FILTER EXTENDING IN THE DIRECTION OF SAID MAJOR AXIS OF SAID HOUSING, A QUARTZ LENS HAVING A CONCAVE SURFACE AND A PLANAR SURFACE, SAID PLANAR SURFACE BEING COATED WITH A THIN LAYER OF A HIGHLY REFLECTIVE METAL WHICH PERMITS TRANSMISSION OF FROM ABOUT 1/2% TO ABOUT 3 1/2% LIGHT THROUGH SAID LENS, SAID LENS BEING MOUNTED WITHIN SAID HOUSING IN SPACED RELATION TO SAID GREEN GLASS FILTER WITH THE OPTICAL AXIS OF SAID LENS ALSO EXTENDING THE THE DIRECTION OF SAID MAJOR AXIS OF SAID HOUSING AND WITH SAID CONCAVE SURFACE FACING SAID GREEN GLASS FILTER, SAID TUBULAR HOUSING HAVING FIRST MEANS ASSOCIATED THEREWITH FOR REMOVABLY MOUNTING SAID HOUSING ON A TELESCOPE SO THAT SAID QUARTZ LENS IS IN ADVANCE OF SAID GREEN GLASS FILTER WITH RESPECT TO THE NORMAL DIRECTION OF LIGHT PASSING THROUGH SAID HOUSING, WHEN SAID ADAPTER IS IN USE, AND SAID TUBULAR HOUSING HAVING SECOND MEANS ASSOCIATED THEREWITH FOR HAVING REMOVABLY MOUNTED THEREON, AN OCULAR, IN BACK OF SAID GREEN GLASS FILTER WITH REPECT TO SAID NORMAL DIRECTION OF LIGHT.