Method of manufacturing optical low-pass filter

Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only

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348201, 359900, 359498, 359574, 349112, G02F 11333

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active

057574499

ABSTRACT:
A mother layer made of a thermoplastic resin is formed on the substrate. The mother layer is etched to make a grating layer. The etching process is stopped so that an offset layer remains under the grating layer. The grating layer and the offset layer are baked to be molten. The baking process is stopped when a phase grating defined by a surface having a sinusoidal shape is formed.

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Fujisawa et al., "Optical Low-Pass Filter Using the Organic Optical Material", ITEJ Technical Report, vol. 14, No. 53, Sept. 1990, pp. 7-12.
O. Wada, "Ion-Beam Etching of InP and Its Application of High Radiance InGaAsP/Inp Light Emitting Diodes", J. electrochem, Soc. Solid-State Science and Technology, Vol. 131, No. Oct. 1984 pp. 2373-2380.

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