Optical filter made of inorganic material for red light

Details Optical filter made of inorganic material for red light Optical filter made of inorganic material for red light

1985-06-17

1986-12-02

Corbin, John K.

Compositions

Radioactive compositions

Nuclear reactor fuel

252582, G02B 520

Patent

active

046260714

ABSTRACT:
An optical filter made of inorganic material for red light which transfers red light and absorbs all of the other colored lights can be realized by sticking an inorganic mixture powder pasted by mixing with screen oil on a glass substrate and firing it. The mixture includes sulfates of copper, alkali metal and alkali earth metal. The contrast of the picture displayed on a display device can be increased significantly by reducing the reflection of incident ambient light without the reduction of brightness on account of the application of the above optical filter onto the displaying screen thereof.

REFERENCES:
patent: 3400006 (1968-09-01), Berning et al.
patent: 3826751 (1974-07-01), Laliberte
patent: 4106946 (1978-08-01), Ritze
patent: 4197230 (1980-04-01), Baney et al.
patent: 4297142 (1981-10-01), Ritze
patent: 4383018 (1983-05-01), Martin et al.

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