Petzval type objective including field shaping lens

Claim 1

A PETZVAL TYPE OF PROJECTION OBJECTIVE FOR FOCUSING A BEAM OF RADIATION OF A=NOMINALLY .36 MICRON FORMING A CURVED IMAGE SURFACE HAVING A RADIUS OF SUBSTANTIALLY. 256F, WHERE F REPRESENTS THE EQUIVALENT FOCAL LENGTH OF SAID OBJECTIVE, SAID OBJECTIVE COMPRISING THREE LENS MEMBERS WHICH ARE OPTICALLY ALIGNED WITH AND SPACED FROM EACH OTHER, THE FRONT LENS MEMBER ON THE ENTRANT SIDE INCLUDING A FRONT DOUBLE CONVEX LENS ELEMENT WHICH IS MADE OF FUSED QUARTZ AND IS DESIGNATED I, AND FURTHER INCLUDING A REAR CONCAVO-CONVEX LENS ELEMENT WHICH IS SPACED FROM ELEMENT I AND IS FORMED OF CSI AND IS DESIGNATED II, THE SECOND LENS MEMBER INCLUDING A FRONT CONVEXCONCAVO LENS ELEMENT WHICH IS MADE OF CSI AND IS DESIGNATED III, AND FURTHER INCLUDES A DOUBLE CONVEX LENS ELEMENT WHICH IS SPACED FROM ELEMENT III AND IS FORMED FROM FUSED QUARTZ, SAID ELEMENT BEING DESIGNATED IV, THE THIRD LENS MEMBER WHICH IS A SINGLET NEGATIVE FIELD SHAPING LENS BEING OF CONCAVE PLANO FORM AND BEING DESIGNATED V, THE SPECIFIC OPTICAL DATA FOR CONSTRUCTING SAID OBJECTIVE BEING GIVEN IN THE TABLE OF MATHEMATICAL EXPRESSIONS HEREBELOW WHEREIN R1 TO R10 DESIGNATE THE RADII OF THE LENS SURFACES OF THE SUCCESSIVE LENS MEMBERS I TO V, AND THE MINUS (-) SIGN USED THEREWITH IS ASSIGNED TO THOSE SURFACES HAVING THEIR CENTERS OF CURVATURE LOCATED ON THE ENTRANT SIDE OF THEIR VERTICES, THE AXIAL THICKNESSES OF SAID SUCCESSIVE LENS ELEMENTS ARE REPRESENTED BY T1 TO T5, AND THE AXIAL SPACES BETWEEN THE ELEMENTS ARE DESIGNATED SUCCESSIVELY S1 TO S5,