Axially-graded index-based couplers

Details Axially-graded index-based couplers Axially-graded index-based couplers

1996-10-31

1998-09-29

Epps, Georgia Y.

Optical: systems and elements

Lens

With graded refractive index

359718, 385 33, G02B 300

Patent

active

058153187

ABSTRACT:
An optical coupler is provided that comprises one lens component, comprising at least one axially-graded index of refraction element. When the optical coupler component includes one axially-graded index of refraction element, a homogeneous "boot" element is cemented on entrance surface to provide plano-plano coupling. When the optical coupler includes two or more axially-graded index of refraction elements, both entrance and exit surfaces are planar. The optical coupler component may be sized to provide focusing at its exit surface. The axially graded index-based couplers of the present invention comprise a single component, thereby reducing the number of components and the concomitant complexity of the optical system. Further, many of these couplers can be fabricated with plano-plano entrance-exit surfaces, thereby obviating the need for forming curved focusing surfaces and thus avoiding the introduction of air spaces.

REFERENCES:
patent: 4929065 (1990-05-01), Hagerty et al.
patent: 5323268 (1994-06-01), Kikuchi
patent: 5541774 (1996-07-01), Blankenbecler
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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