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BK7, UV-grade fused silica and sapphire windows. Other materials availble on request. Optical windows are glass components with polished faces that are relatively parallel. They are used as a protective element between two environments and their impact on the passage of visible light is neutral. BK7 Windows Our BK7 windows are available with a high parallelism of 10 arc seconds, ideal for applications requiring minimal transmitted beam deviation. |  |
High Precision BK7 Windows | Specifications: | | | | Material: | BK7 grade A optical glass | | Flatness: | λ /10 at 633 nm | Parallelism: | <10 arc seconds | | Surface Quality: | 20/10 scratch-dig | | Diameter Tolerance: | +0.0/-0.1mm | | Thickness: | ±0.2mm | | Bevel : | 0.2mm x 45° | | Coatings: | uncoated |
| Order No. | Diameter(mm) | Thickness(mm) | W10-BK7-005 | 5.0 | 2.0 | W10-BK7-010 | 10.0 | 2.0 | W10-BK7-012 | 12.5 | 6.0 | W10-BK7-020 | 20.0 | 6.0 | W10-BK7-025 | 25.0 | 6.0 | W10-BK7-038 | 38.0 | 10.0 | W10-BK7-050 | 50.0 | 10.0 |
Standard BK7 Windows | Specifications: | |  | | Material: | BK7 grade A optical glass | | Flatness: | λ /2 at 633 nm | Parallelism: | <1 arc minute | | Surface Quality: | 40/20 scratch-dig | | Diameter Tolerance: | +0.0/-0.1mm | | Thickness: | ±0.2mm | | Bevel : | 0.2mm x 45° | | Coatings: | uncoated |
| Order No. | Diameter(mm) | Thickness(mm) | W2-BK7-005 | 5.0 | 2.0 | W2-BK7-010 | 10.0 | 2.0 | W2-BK7-012 | 12.5 | 2.0 | W2-BK7-020 | 20.0 | 2.0 | W2-BK7-025-01 | 25.0 | 2.0 | W2-BK7-025-02 | 25.4 | 2.0 | W2-BK7-038 | 38.0 | 4.0 | W2-BK7-050 | 50.0 | 4.0 |
Fused Silica Windows These optical windows are precision manufactured using UV - grade synthetic fused silica. In addition to superior transmission characteristics, synthetic fused silica exhibits better thermal properties, exceptional purity, and excellent environmental durability for demanding applications. High Precision Fused Silica Windows | Specifications: | | | | Material: | UV grade fused silica | | Flatness: | λ /2 at 633 nm | Parallelism: | <1 arc minute | | Surface Quality: | 20/10 scratch-dig | | Diameter Tolerance: | +0.0/-0.1 mm | | Thickness: | ±0.2 mm | | Bevel : | 0.25 mm x 45° | | Coatings: | uncoated |
| Order No. | Diameter(mm) | Thickness(mm) | W10-FS-005 | 5.0 | 2.0 | W10-FS-010 | 10.0 | 2.0 | W10-FS-012 | 12.5 | 6.0 | W10-FS-020 | 20.0 | 6.0 | W10-FS-025 | 25.0 | 6.0 | W10-FS-038 | 38.0 | 10.0 | W10-FS-050 | 50.0 | 10.0 |
Standard Fused Silica Windows | Specifications: | | | | Material: | UV grade fused silica | | Clear Aperture | 85% | | Flatness: | λ /10 at 633 nm | Parallelism: | <10 arc seconds | | Surface Quality: | 20/10 scratch-dig | | Diameter Tolerance: | +0.0/-0.1 mm | | Thickness: | ±0.2 mm | | Bevel : | 0.25 mm x 45° | | Coatings: | uncoated |
| Order No. | Diameter(mm) | Thickness(mm) | W2-FS-005 | 5.0 | 2.0 | W2-FS-010 | 10.0 | 2.0 | W2-FS-012 | 12.5 | 2.0 | W2-FS-020 | 20.0 | 2.0 | W2-FS-025-01 | 25.0 | 2.0 | W2-FS-025-02 | 25.4 | 2.0 | W2-FS-038 | 38.0 | 4.0 | | W2-FS-050 | 50.0 | 4.0 |
Sapphire Windows For the most demanding applications, sapphire is the obvious choice. This material is extremely hard and chemically inert, so it can be cleaned repeatedly with little danger of damage. Sapphire has excellent thermal properties and can withstand temperatures above 1500°C. Furthermore, sapphire transmits from the near UV to the mid IR. Too expensive? Sapphire windows cost only about 50% more than similar fused silica windows for diameters up to 20 mm. High Precision Sapphire Windows | Specifications: | | | | Material: | Optical Grade Sapphire | | Flatness: | λ/4 per 25.4 mm area | Parallelism: | <30 seconds | | Surface Quality: | 40/20 scratch-dig | | Diameter Tolerance: | ±0.1 mm | | Thickness: | ±0.1 mm | | Coatings: | uncoated |
| Order No. | Diameter(mm) | Thickness(mm) | W4-SR-003 | 3.0 | 1.0 | W4-SR-005 | 5.0 | 1.0 | W4-SR-006 | 6.3 | 1.0 | W4-SR-012 | 12.5 | 2.0 | W4-SR-020 | 20.0 | 2.0 | W4-SR-025 | 25.0 | 2.0 |
Standard Sapphire Windows | Specifications: | | | | Material: | Optical Grade Sapphire | | Flatness: | 1-2 λ per 25.4 mm area | Parallelism: | <3 arc minutes | | Surface Quality: | 80/50 scratch-dig | | Diameter Tolerance: | ±0.1 mm | | Thickness: | ±0.1 mm | | Coatings: | uncoated |
| Order No. | Diameter(mm) | Thickness(mm) | W1-SR-003 | 3.0 | 0.5 | W1-SR-005 | 5.0 | 0.5 | W1-SR-006 | 6.3 | 0.5 | W1-SR-012 | 12.5 | 1.0 | W1-SR-020 | 20.0 | 1.0 | W1-SR-025 | 25.0 | 1.0 |
Note: Other coatings and sizes are also available upon request.
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