Imaging lens system

Details Imaging lens system Imaging lens system

1990-12-24

1992-12-15

Sugarman, Scott J.

Optical: systems and elements

Lens

With graded refractive index

359775, 359785, G02B 914, G02B 916, G02B 920, G02B 936

Patent

active

051722720

ABSTRACT:
An imaging lens system comprising, in the order from the object side, a first lens component having a convex surface on the object side and a positive refractive power, a second lens component having a concave surface on the image side and a negative refractive power, and a third lens component. Through the imaging lens system is of a triplet or Tessar type, the lens system is designed so as to have a high aperture ratio and favorably corrected coma by arranging a radial GRIN lens element having a concave surface on the image side and a positive refractive power at the most image side location in the third lens component.

REFERENCES:
patent: 4859040 (1989-08-01), Kitagishi et al.
patent: 4907866 (1990-03-01), Kitagishi et al.
patent: 4998807 (1991-03-01), Uzawa et al.
Caldwell, J. B. et al; "Design of Gradient Index Lens Systems for Disc Format Cameras", Applied Optics; vol. 25, No. 18; Sep. 1986; pp. 3351-3355.

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