Ultraviolet ray-shielding agent and tube

Details Ultraviolet ray-shielding agent and tube Ultraviolet ray-shielding agent and tube

1991-07-15

1993-05-25

O'Shea, Sandra L.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

313635, 359359, 359361, 359580, H01J 6140, H01J 516

Patent

active

052143457

ABSTRACT:
An ultraviolet ray-shielding agent for selectively shielding ultraviolet rays while allowing a transmission of visible rays therethrough, comprising a visible ray-transmitting binder and extremely fine zinc oxide particles having an average size of 0.1 .mu.m or less in a mixing ratio of the zinc oxide particles to the binder of 1/10 to 10/1, and an ultraviolet ray-shielding tube for visible ray-irradiation luminescent lamps comprising a transparent substrate tube for sealing a light emission source therein, and a coating formed on a surface of the substrate tube and comprising the above-mentioned ultraviolet ray-shielding agent.

REFERENCES:
patent: 2774903 (1956-12-01), Burns
patent: 3988628 (1976-10-01), Clausen
patent: 4680504 (1987-07-01), Helvy et al.
patent: 4710677 (1987-12-01), Halbeistadt et al.
patent: 4717852 (1988-01-01), Dobrusskin et al.
patent: 4792716 (1988-12-01), Walsh
patent: 4831269 (1989-05-01), Kagami et al.
patent: 4855189 (1989-08-01), Simopalos et al.

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