Optical sighting apparatus with coaxial objective lens system and grid imaging lens

Claim 1

OPTICAL SIGHTING APPARATUS COMPRISING AN OBJECTIVE SYSTEM INCLUDING A FIRST OBJECTIVE LENS AND A SECOND OBJECTIVE LENS COAXIAL WITH AND SPACED FROM SAID FIRST OBJECTIVE LENS, A FIRST TRANSPARENT FILTER MEMBER IN FRONT OF SAID FIRST OBJECTIVE LENS AND COAXIAL THEREWITH, A COAXIAL SIGHTING GRID MEANS BETWEEN SAID FIRST OBJECTIVE LENS AND SAID FIRST FILTER, A SECOND TRANSPARENT FILTER MEMBER OPTICALLY COMPLEMENTARY TO SAID FIRST FILTER MEMBER, AN OPTICAL LENS ADJACENT SAID SECOND FILTER ON THE EMERGENT SIDE THEREOF FOR FORMING AN IMAGE OF SAID SIGHTING GRID IN THE IMAGE PLANE OF SAID OBJECTIVE SYSTEM; SAID SECOND FILTER AND ADJACENT OPTICAL LENS BEING COAXIAL WITH AND LOCATED BETWEEN SAID FIRST OBJECTIVE LENS AND SAID SECOND OBJECTIVE LENS AND OF A SUBSTANTIALLY REDUCED RADIAL DIMENSION RELATIVE TO THE CORRESPONDING DIMENSION OF SAID OBJECTIVE SYSTEM FOR DEFINING A SPACE AROUND SAID SECOND FILTER AND ADJACENT OPTICAL LENS PASSING LIGHT RAYS FROM THE FIELD VIEW EMERGING FROM SAID FIRST OBJECTIVE LENS.