FLAT MICROLENS ARRAY AND PRODUCTION METHOD THEREOF

Title:

FLAT MICROLENS ARRAY AND PRODUCTION METHOD THEREOF

Document Type and Number:

WIPO Patent Application WO/1996/021169

Kind Code:

A1

Abstract:

A method of producing a microlens array by a diffusion method, which provides a microlens array having high convergence efficiency irrespective of a lens arrangement and a lens packaging ratio. A two-dimensional regular arrangement of a large number of distributed refractive index type microlenses is formed by diffusing materials which contribute to the increase of a refractive index of the substrate. The microlenses are densely arranged on the substrate surface, and diffusion fronts of individual microlenses are fused into those of the adjacent microlenses. The length of the area of fusion between two adjacent microlenses in the direction of the straight line connecting the centers of these two microlenses is not greater than 20 % of the pitch of the microlenses in said direction.

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Inventors:

NAKAMA KENICHI (JP)
TANIGUCHI SATOSHI (JP)
HAMANAKA KENJIRO (JP)
HAMADA HIROSHI (JP)

Application Number:

PCT/JP1995/002681

Publication Date:

July 11, 1996

Filing Date:

December 26, 1995

Export Citation:

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Assignee:

NIPPON SHEET GLASS CO LTD (JP)
SHARP KK (JP)
NAKAMA KENICHI (JP)
TANIGUCHI SATOSHI (JP)
HAMANAKA KENJIRO (JP)
HAMADA HIROSHI (JP)

International Classes:

G02B3/00; G02B27/10; G09F9/00; (IPC1-7): G02B3/00

Foreign References:

JPH03136004A	1991-06-10
JPH0545642A	1993-02-26
JPH06230203A	1994-08-19

Other References: