Quadaxial gradient index lens

Details Quadaxial gradient index lens Quadaxial gradient index lens

1996-10-31

1998-08-18

Epps, Georgia Y.

Optical: systems and elements

Lens

With graded refractive index

359652, 359654, 359668, G02B 300, G02B 1308

Patent

active

057965250

ABSTRACT:
An axially-based lens is provided, comprising two biaxial elements, each having entrance and exit surfaces. The exit surface of one of the elements is joined to the entrance surface of the other element, with one of the elements rotated at an angle with respect to the other. In a preferred embodiment, the angle of rotation is 90.degree.. The axially-based lens thus comprises four axial sub-elements, and is called a "quadaxial" lens herein. The axially-based lens element has the ability to gather and focus light to a spot with a minimum of spherical aberration and with a substantially uniform distribution of light intensity from center to periphery of the spot. In a preferred embodiment, the lens element focuses light to a square spot size.

REFERENCES:
patent: 3894789 (1975-07-01), Kobayashi et al.
patent: 4929065 (1990-05-01), Hagerty et al.
P.K. Manhart, Optics and Photonics News, pp. 44-47, (Mar. 1995).
Xiaojie J. Xu et al, "Preparation of Macro Axial Gradient Refraction Glasses", Gradient Index Optical Systems--Topical Meeting, Rochester, NY (Jun. 7-8, 1994).

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