Knight Optical (UK) Ltd BK7 or equivalent Window 75x75x8mmthk Uncoated WQK7575

These precision grade BK7 or equivalent windows are used to seal optical enclosures especially suited to low power laser applications. Our stock range of ¼ wave BK7 or equivalent windows are uncoated and also AR coated both faces with extended BBAR for visible and NIR applications (450-900nm) We are also soon to introduce a range that offers increased performance in the telecom region of 1100-1700nm. Our stock BK7 or equivalent windows can also be AR coated for other wavelengths, beamsplitter coated or mirror coated to meet your bespoke custom requirements. These BK7 or equivalent windows have very parallel faces so will introduce minimal beam deviation. Flatness and surface quality is also tightly controlled. Stock BK7 or equivalent plates can be edged down to smaller diameters and custom sizes at short notice, please speak to our sales team.