OPTICAL SCANNER FOR OPTICAL ACTIVE MATRIX

Japanese Patent JP3407055

B2

PURPOSE: To obviate the generation of dependency of an incident angle on a mode by arranging a concave lens array having concave lenses making a pair with respective convex lenses of a convex lens array between this convex lens array and an optical active matrix.
CONSTITUTION: A transparent substrate 10 is internally provided with many optical waveguides 21 formed in parallel and a switching element array having a photosensitivity on these waveguides 21. The light propagating in the waveguides 21 is made incident on the switching elements to change the switching elements from an off-state to an on-state. This optical scanner consists of a light source 20, a rotary polyhedral mirror 22, mirrors 24, 26 which reflect the light beams controlled in direction from this rotary polyhedral mirror 22, a toric lens 28 and the convex lens array. The concave lens array having the concave lenses making a pair with the respective convex lenses of the convex lens array 32 is arranged between the convex lens array 32 and the optical active matrix. As a result, the mode of the light propagating in the waveguides 21 is stabilized and the fluctuation of the output signals does not arise any more.

Ichiro Tanaka
Yukihisa Kusuda
Kenji Morio

JP3215794A

May 19, 2003

March 02, 1994

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NIPPON SHEET GLASS COMPANY,LIMITED

G02B26/10; G02B6/08; G02B26/12; G02F1/13; (IPC1-7): G02B6/08; G02B26/10; G02F1/13

JP743740A
JP1224727A
JP4353829A
JP511268A
JP1173016A
JP3171023A
JP3293313A
JP451111A
JP5346547A
JP1221719A
JP58208717A
JP215205A
JP4166914A
JP5286740A
JP6177807A

Ohno Seiichi

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