Diffraction grating array and display having a diffraction grati

Details Diffraction grating array and display having a diffraction grati Diffraction grating array and display having a diffraction grati

1995-03-20

1997-04-01

Henry, Jon W.

Optical: systems and elements

Diffraction

From grating

359569, 359574, G02B 518

Patent

active

056172486

ABSTRACT:
A display having a diffraction grating comprises a substrate, a plurality of diffraction grating cells formed over a surface of the substrate and comprising a diffraction grating having curve portions arranged in a parallel shift relation, and a light-shutting unit including light-shutting elements having an opening, wherein a length of the diffraction grating in a direction perpendicular to that shift direction of the curve portions is made substantially equal to a length of the opening of the light-shutting element in the light-shutting unit, a diffraction grating element in the diffraction grating is repeated at least once in a direction perpendicular to the shift direction of the curve portions to provide the above cell, a length of the cell in the direction perpendicular to the shift direction of the curve portions is made substantially equal to a pitch length of the light-shutting element in the light-shutting unit, and the light-shutting unit is arranged on an illumination light entry side of the diffraction grating or on an diffraction light exit side of the diffraction grating and has an opening of a given configuration.

REFERENCES:
patent: 4118104 (1978-10-01), Yamada et al.
patent: 5032003 (1991-07-01), Antes
patent: 5058992 (1991-10-01), Takahashi
patent: 5301062 (1994-04-01), Takahashi et al.

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