Commercial Quality Flat Windows
Commercial windows used for sight glasses, instrument windows, beamsplitter substrates, vacuum windows, welding window substrates. Esco carries inventory of round and square commercial optical windows of various materials: UV grade fused silica (S1-UV), optical grade fused quartz (A1), commercial grade fused quartz (G1), IR quartz (I2-IR), BK-7, Pyrex�, and Sapphire.
Precision Flat Windows
Precision laser quality round windows that range from 1/4 wave (lambda over four) to 1/10 wave (lambda over ten) flat. Catalog parallel specifications are either 5 seconds or 10 minutes. Ideal for interferometer flats, laser windows, beamsplitter substrates, and parallel plates. Precision flats are available in BK-7 and UV grade fused silica.
Precision Wedge Windows
Precision laser quality round wedge windows are ideal for applications where direct back reflections would be a problem. These elements are similar to the precision flat windows but have a deliberate wedge of 30 minutes. Optical flat wedges range from 1/4 wave (lambda over four) to 1/10 wave (lambda over ten) flat, and are offered in BK-7 and UV grade fused silica.
Brewster Angle Laser Windows
Brewster windows are used inside laser cavities to obtain zero reflection loss for p-polarized light. Esco's brewster windows are made from the highest purity UV grade fused silica and finished to superior quality standards.