Optical windows are optical glass composed of relatively parallel ground and polished surfaces. It is used to isolate two physical environments and allow light to pass through. It is often used in projection systems, imaging systems, and optical measurement systems. Dayoptics provides various types of windows, and customized windows.
| Specification | BK7 Windows | Fused Silica Windows | Sapphire |
| Diameter Tolerance | +0.0，-0.1mm | +0.0，-0.1mm | +0.0，-0.2mm |
| Thickness Tolerance | +/-0.2mm | +/-0.2mm | +/-0.2mm |
| Clear Aperture | >80% | >80% | >85% |
| Parallelism |
1′（Standard） 10″（High Precision） |
1′（Standard） 10″（High Precision |
1′ |
| Surface Quality |
60/40（Standard） 20/10（High Precision |
60/40（Standard） | 60/40（Standard） |
|
Wavefront Distortion |
λ/ 4(Standard)
λ/10（High Precision）per 25mm@633nm |
λ/ 4(Standard) λ/10（High Precision）per 25mm@633nm |
|
| Bevel | 0.25mm*45° | 0.25mm*45° | 0.25mm*45° |
| Coating | Uncoated | Uncoated | Uncoated |
BK7 Windows
| Part No. | Diameter(mm) | Thickness(mm) |
| WIN0101 | 10.0 | 3.0 |
| WIN0102 | 12.7 | 3.0 |
| WIN0103 | 25.4 | 3.0 |
| WIN0104 | 10.0 | 6.35 |
| WIN0105 | 12.7 | 6.35 |
| WIN0106 | 25.4 | 6.35 |
Fused Silica Windows
| Part No. | Diameter(mm) | Thickness(mm) |
| WIN0201 | 10.0 | 3.0 |
| WIN0202 | 12.7 | 3.0 |
| WIN0203 | 25.4 | 3.0 |
| WIN0204 | 10.0 | 6.35 |
| WIN0205 | 12.7 | 6.35 |
| WIN0206 | 25.4 | 6.35 |
Sapphire Windows
| Part No. | Diameter(mm) | Thickness(mm) |
| WIN0301 | 5.5 | 0.5 |
| WIN0302 | 8.5 | 0.5 |
| WIN0303 | 9.5 | 0.5 |
| WIN0304 | 10 | 1 |
| WIN0305 | 12.7 | 1 |
| WIN0306 | 25.4 | 1 |
|
|
BK7
windows |
Fused
silica windows |
Sapphire windows |
|
Dimensional Tolerance |
+0.0 ，-0.1mm |
+0.0 ，-0.1mm |
|
|
Thickness Tolerance |
+/-0.2mm |
+/-0.2mm |
|
|
Effective Caliber |
＞80% |
＞80% |
＞85% |
|
Parallelism |
1’(Standard)10" High PrecisionX ) |
1’(Standard)10" High PrecisionX ) |
1’ |
|
Smoothness |
60/40( Standard)(20/10(HighPrecision) |
60/40( Standard) |
60/40( Standard) |
|
Wavefront Distortion |
λ/4(Standard) λ/10 ( High Precision ) per 25mm@633nm |
λ/4(Standard)λ/10 ( High Precision ) per 25mm@633nm |
λ@633nm |
|
Chamfer |
＜0.25mm*45° |
＜0.25mm*45° |
＜0.25mm*45° |
|
Coating |
Uncoated |
Uncoated |
Uncoated |
|
|
BK7
windows |
Fused
silica windows |
Sapphire windows |
|
Dimensional Tolerance |
+0.0 ，-0.1mm |
+0.0 ，-0.1mm |
|
|
Thickness Tolerance |
+/-0.2mm |
+/-0.2mm |
|
|
Effective Caliber |
＞80% |
＞80% |
＞85% |
|
Parallelism |
1’(Standard)10" High PrecisionX ) |
1’(Standard)10" High PrecisionX ) |
1’ |
|
Smoothness |
60/40( Standard)(20/10(HighPrecision) |
60/40( Standard) |
60/40( Standard) |
|
Wavefront Distortion |
λ/4(Standard) λ/10 ( High Precision ) per 25mm@633nm |
λ/4(Standard)λ/10 ( High Precision ) per 25mm@633nm |
λ@633nm |
|
Chamfer |
＜0.25mm*45° |
＜0.25mm*45° |
＜0.25mm*45° |
|
Coating |
Uncoated |
Uncoated |
Uncoated |
