Windows

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.

Projection Imaging Measuring

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Product introduction

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	λ@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