Anamorphic scanner lens system
AssigneeThe Perkin-Elmer Corporation
InventorJuan L. Rayces
Life of this patent
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Abstract
An improved anamorphic scanner lens system including seven axially aligned cylindrical lens elements, the cylinder axes of the surfaces of the first six elements being disposed at right angles to the direction of the scan line, the axis of the front surfaces of the last element being parallel to the scan line and the rear surface thereof being substantially flat, the first six cylinders being arranged in pairs with 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 an aperture stop disposed in front of the first lens.
Claims8
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.
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.degree. 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 __________________________________________________________________________
Dependencies are inferred from the claim text.