Anamorphic scanner lens system

Claim 2

An anamorphic scanner lens system comprising in axial alignment: a plurality of pairs of cylindrical lens elements, the cylinder axes of the surfaces thereof being at right angles to the direction of the scan line, each pair consisting of a biconvex positive lens and a negative meniscus lens, the concave side of the menisci alternate pointing toward the direction of the light and in the direction of the light; aperture stop means disposed in front of said plurality of pairs of lens elements; and a cylindrical lens element disposed behind said plurality of pairs of lens elements having a front surface having an axis parallel to the scan line and having a substantially flat rear surface.

Claim 3

An anamorphic scanner lens system according to claim 1 wherein said plurality of pairs of cylindrical lens elements is three.

Claim 4

An anamorphic scanner lens system according to claim 2 wherein said aperture stop means is of rectangular configuration.

Claim 5

An anamorphic scanner lens system according to claim 3 wherein the dimensions of said aperture stop means with respect to the anamorphic ratio are so selected that the exit pupil of the system is square in shape.

Claim 6

An anamorphic scanner lens system according to claim 2 wherein the index of refraction of all of said lens elements is substantially the same.

Claim 7

An anamorphic scanner lens system according to claim 2 wherein the material of all of said lens elements have substantially the same dispersive power.

Claim 8

An anamorphic scanner lens system comprising in axial alignment: three pairs of cylindrical lens elements, the cylinder axes of the surfaces thereof being at right angles to the direction of the scan line, each pair consisting of a biconvex positive lens and a negative meniscus lens, the concave side of the menisci alternate pointing toward the direction of the light and in the direction of the light; aperture stop means disposed in front of said three pairs of lens elements; a cylindrical lens element disposed behind said three pairs of lens elements having a front surface having an axis parallel to the scan line and having a substantially flat rear surface; and said system being characterized by the following constructional data: __________________________________________________________________________ Focal length - 9.5 in. Relative aperature - f/8 (Square aperture) Angle of scanning - 54° Overall length - 16.114 in. Front vertex distance - 16.52 Stop position - 4.0273 in. ahead of first element Refractive Abbe Axial Element Radius Thickness Index V No. Distance __________________________________________________________________________ 10 r.sub.1 -3.1675 .8459 1.805 .254 0.000 r.sub.2 -3.8737 .1511 .845 12 r.sub.3 50.7119 1.0000 1.805 .254 .997 r.sub.4 -17.7078 1.9480 1.997 14 r.sub.5 25.7653 1.4000 1.805 .254 3.945 r.sub.6 -18.1197 .0515 5.345 16 r.sub.7 8.0063 .6955 1.805 .254 5.396 r.sub.8 6.6508 3.9720 6.092 18 r.sub.9 -6.3665 2.0931 1.805 .254 10.064 r.sub.10 -9.8819 .0370 12.157 20 r.sub.11 33.4483 1.2500 1.805 .254 12.194 r.sub.12 -39.4346 1.6699 13.444 22 r.sub.13 .7829 1.0000 1.805 .254 15.114 r.sub.14 99999.9999 .4041 16.114 26 Image Surface 16.518 __________________________________________________________________________

Claim 9

An anamorphic scanner lens system comprising in axial alignment: three pairs of cylindrical lens elements, the cylinder axes of the surfaces thereof being at right angles to the direction of the scan line, each pair consisting of a biconvex positive lens and a negative meniscus lens, the concave side of the menisci alternate pointing toward the direction of the light and in the direction of the light; aperture stop means disposed in front of said three pairs of lens elements; a cylindrical lens element disposed behind said three pairs of lens elements having a front surface having an axis parallel to the scan line and having a substantially flat rear surface; and said system being characterized by the following constructional data: __________________________________________________________________________ Focal length - 9.5 in. Relative aperature - f/8 (Square aperture) Angle of scanning - 54° Overall length - 16.114 in. Front vertex distance - 16.52 Stop position - 4.0273 in. ahead of first element Refractive Abbe Axial Element Radius Thickness Index V No. Distance __________________________________________________________________________ 10 r.sub.1 -3.1675 .8459 1.805 .254 0.000 r.sub.2 -3.8737 .1511 .845 12 r.sub.3 50.7119 1.0000 1.805 .254 .997 r.sub.4 -17.7078 1.9480 1.997 14 r.sub.5 25.7653 1.4000 1.805 .254 3.945 r.sub.6 -18.1197 .0515 5.345 16 r.sub.7 8.0063 .6955 1.805 .254 5.396 r.sub.8 6.6508 3.9720 6.092 18 r.sub.9 -6.3665 2.0931 1.805 .254 10.064 r.sub.10 -9.8819 .0370 12.157 20 r.sub.11 33.4483 1.2500 1.805 .254 12.194 r.sub.12 -39.4346 1.6699 13.444 22 r.sub.13 .7829 1.0000 1.805 .254 15.114 r.sub.14 99999.9999 .4041 16.114 26 Image Surface 16.518 __________________________________________________________________________

Claim 10

An anamorphic scanner lens system according to claim 7 wherein said aperture stop means is of rectangular shape having a length of about 1.2 inches in the direction of scan and a width of about 0.12 inches.