Aspherical lens for use in optical equipment

Details Aspherical lens for use in optical equipment Aspherical lens for use in optical equipment

1984-12-14

1986-09-02

Corbin, John K.

350451, G02B 304, G02B 1318

Patent

active

046092625

ABSTRACT:
An aspherical lens for use in optical equipment is made of a transparent lens material and rotationally symmetrical around a Z-axis of an XYZ three-dimensional coordinate system. The aspherical lens has a surface on which incident light falls and another surface from which light emerges. Either one of the surfaces comprises a spherical surface and the other surfaces comprises an aspherical surface to allow a lens to singly diverge and converge parallel rays of light. The coordinates in three-dimensional coordinate system of points on the spherical and aspherical surfaces are given using as parameters an angle (-90.degree..ltoreq..theta..ltoreq.90.degree.) formed in a plane containing the Z-axis and normal to an X-Y plane and between the Z-axis and a line connecting the point and the origin of the coordinate system, and an angle (0.degree..ltoreq..phi..ltoreq.180.degree.) formed in a plane parallel to the X-Y plane and between an X-axis and a line connecting the point and the Z-axis.

REFERENCES:
patent: 1422307 (1922-07-01), Salto
patent: 2063178 (1936-12-01), Merte
patent: 3508811 (1970-04-01), Yoshida
patent: 3598477 (1971-08-01), Levin

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