Projection objective for photo mechanisms

Claim 1

AN OPTICAL SYSTEM OF THE GAUSS TYPE FOR A PROJECTION OBJECTIVE WORKING AT LOW MAGNIFICATION, SAID SYSTEM HAVING A RELATIVE APERTURE AS LARGE AS F/4.5 FOR INFINITY AND BEING WELL CORRECTED FOR COLOR ABERRATION FOR THE TRANSMISSION OF RADIANT ENERGY IN THE WAVELENGTH RANGE FROM 3400 A. TO 4400 A. AS WELL AS BEING DIFFRACTION LIMITED IN PERFORMANCE, SAID SYSTEM CONSISTING OF A FRONT SINGLET MENISCUS LENS MEMBER, A SINGLET DOUBLE CONVEX MEMBER MOST REARWARDLY, AND A PAIR OF SUBSTANTIALLY SYMMETRICAL COMPOUND CONVEX-CONCAVO LENS MEMBERS OPTICALLY ALIGNED BETWEEN SAID FRONT AND REAR MEMBERS, THE CONCAVE SURFACES OF THE COMPOUND MEMBERS ENCLOSING A DIAPHRAGM CENTRALLY THEREBETWEEN, THE COMPOUND MEMBERS EACH HAVING A POSITIVE MENISCUS LENS ELEMENT AND A NEGATIVE MENISCUS LENS ELEMENT IN CONTACT THEREWITH AND NEAREST TO SAID DIAPHRAGM, THE RADII R1 TO R10 OF THE SUCCESSIVE LENS SURFACES ON THE LENS ELEMENTS I TO VI, THE SUCCESSIVE LENS THICKNESSES T1 TO T6, THE LENS SPACINGS S1 TO S4 AND THE REFRACTIVE INDICES ND AND ABBE NUMBERS V HAVING VALUES SUBSTANTIALLY AS GIVEN IN THE TABLE HEREBELOW; R1=.497F R2=1.773F R3=.204F R4=.414F R5=.167F R6=-.1785F R7=-.609F R8=-.2135F R9=4.140F R10=-.657F T1=.0254F T2=.0595F T3=.0254F T4=.0245F T5=.0631F T6=.0233F S1=.00424F S2=.1063F DIAPHRAGM S3=.1063F S4-.000833F ND(I)=ND(II)=ND(V)=ND(VI)=1.517 ND(II)=ND(IV)=1.583 V(I)=V(II)=V(V)=V(VI)=64.2 V(III)=V(IV)=46.5