Glare protection device

Details Glare protection device Glare protection device

2005-05-03

2005-05-03

Pyon, Harold (Department: 1772)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C428S001310, C349S013000, C349S041000, C349S074000, C349S104000, C349S096000, C359S245000, C359S614000, C359S352000, C359S356000, C359S361000, C351S165000, C002S432000

Reexamination Certificate

active

06887531

ABSTRACT:
The glare protection device for welding applications contains an active electro-optical filter element (2) with an electronic control circuit (3). The active filter element (2) absorbs the UV-radiation up to 380 nm. An IR-plastic filter (10) is completely joined with the active electro-optical filter element by a compact adhesive layer (11) and together with it forms a single optical and mechanical unit (1) having a high transmittance in the visual region of the spectrum. The IR-plastic filter (10) contains a dye that absorbs the infrared radiation in a wavelength range of 780-1400 nm. With this, a robust, cheap and safe in operation glare protection device for various applications is created.

REFERENCES:
patent: 3382183 (1968-05-01), Donoian et al.
patent: 4620322 (1986-11-01), Eggenschwiler et al.
patent: 4728173 (1988-03-01), Toth
patent: 5239406 (1993-08-01), Lynam
patent: 5867240 (1999-02-01), Crawford et al.
Abstract, Inukai et al., JP Patent 403277676A, Dec. 9, 1991.

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