Patent ID: 6891681

Claim:
An anti-glare protection device comprising a supporting part ( 5 ), an active optical filter element ( 6 ) arranged within a sight opening ( 3 ) of the supporting part ( 5 ) and with a transmittance being controlled by an optical sensor ( 7 ), and a protective plate ( 1 ) affixable to the supporting part ( 5 ) so as to cover the optical filter element ( 6 ) and the sensor ( 7 ), wherein, for protecting the filter element ( 6 ) and the sensor ( 7 ) against gases, smoke and dirt, a seal ( 4 , 4 ′) substantially extending around the sight opening ( 3 ) and the sensor ( 7 ) is disposed between one of the supporting part ( 5 ) and the protective plate ( 1 ) or the filter element ( 6 ) and the protective plate ( 1 ), the seal consisting of an elastically compressible material and being affixed to only one of the supporting part ( 5 ), the protective plate ( 1 ) or the optical filter element ( 6 ) and rendering reducing a flow of gas therepast.