Bk7 Fused Silica Glass Optical Window Lens for Laser and Camera

In optics, winodw means a (usually at leastmechanically flat, sometimesoptically flat, depending on resolution requirements) piece of transparent (for a wavelength range of interest, not necessarily for visible light) optical material that allows light into anoptical instrument. A window is usually parallel and is likely to beanti reflection coated, at least if it is designed for visible light. An optical window may be built into a piece of equipment (such as avacuum chamber) to allow optical instruments to view inside that equipment.Specifications:Material
BK7 Grade A optical glass
UV Grade fused silica
Dimension Tolerance+0.0/-0.2mmThickness Tolerance±0.2mmClear Aperture>90%Parallelism
Standard: 1 arc minute
High Precision: 10 arc secondsSurface Quality
Standard: 60/40
High Precision: 20/10Wavefront Distortion
Standard:λ/4@633nmper 25mm
High Precision: λ/10@633nm per 25mmChamferProtected: <0.5mm@45degCoatingUncoated, available
Standard Products:BK7 Grade A optical glassStandardHigh PrecisionPart No.ø(mm)T(mm)Part No.ø(mm)T(mm)WIND10T310.03.0WIND10T6.3510.06.35WIND12.7T312.73.0WIND12.7T6.3512.76.35WIND15T315.03.0WIND15T6.3515.06.35WIND20T320.03.0WIND20T6.3520.06.35WIND25.4T325.43.0WIND25.4T6.3525.46.35WIND30T330.03.0WIND30T6.3530.06.35WIND38.1T338.13.0WIND38.1T6.3538.16.35WIND50.8T6.3550.86.35WIND50.8T1050.810.0
UV Grade fused silicaStandardHigh PrecisionPart No.ø(mm)T(mm)Part No.ø(mm)T(mm)FWIND10T310.03.0FWIND10T6.3510.06.35FWIND12.7T312.73.0FWIND12.7T6.3512.76.35FWIND15T315.03.0FWIND15T6.3515.06.35FWIND20T320.03.0FWIND20T6.3520.06.35FWIND25.4T325.43.0FWIND25.4T6.3525.46.35FWIND30T330.03.0FWIND30T6.3530.06.35FWIND38.1T338.13.0FWIND38.1T6.3538.16.35WIND50.8T6.3550.86.35FWIND50.8T1050.810.0