Bar Code Scanner Windows Bar Code Scanner WindowsTSP can provide you a fully functional, optical quality plastic exit window for your bar code scanner reader that: blocks unwanted lightextends service lifereduces system power requirementsincreases battery lifeAll of our exit windows are made from optical grade cell cast acrylic in either clear or a filtering color formulated specifically to block unwanted light outside the functional wavelengths of your laser diodes. Each exit window comes with TSPs DURAVUE1000 Crystal Clear Hardcoat which resists scratching and abrasion, extending the service life of your product.