Optical windows
Wedged windows
A sedged window has an angle of 30" between two unparallel planes, avoiding the interference effect due to light reflection by the front and back surfaces of a high-parallelism window, and problems such as poor stability and mode hopping of laser output due to optical interference feedback by the laser resonator. Wedged windows are usually used to make incident beam deviate by certain angles toward the designated directions. When used in a pair, relative rotation of the two optical wedges can make the emergent beam situated in any direction in a pyramid taking the incident beam as its axis.
A sedged window has an angle of 30" between two unparallel planes, avoiding the interference effect due to light reflection by the front and back surfaces of a high-parallelism window, and problems such as poor stability and mode hopping of laser output due to optical interference feedback by the laser resonator. Wedged windows are usually used to make incident beam deviate by certain angles toward the designated directions. When used in a pair, relative rotation of the two optical wedges can make the emergent beam situated in any direction in a pyramid taking the incident beam as its axis.
| Name | Parameters |
| Material | K9/ultraviolet fused quartz |
| Surface flatness | λ10@633nm |
| Wedge angle | 30 arcmin±10 arcmin |
| Diameter tolerance | +0.0/-0.1mm |
| Thickness tolerance | ±0.02mm |
| Surface finish | 10/5～20/10 |
| Bevel | 0.2～0.5mm x 45° |
| Coating | As per customer's request |
Quartz windows
Quartz glass is a kind of special industrial glass made from SiO2.Asa good base material,it has excellent physical,chemical and optical properties.It allows transmission of far ultraviolet light,visible light and near-infrared light,becoming the best choice among all he base materials allowing transmission of ultraviolet light.Thanks to its resistance to high temperature, extremely smal thermal expansivity,extremely high chemical stability,and extent ofbubbles,stripes,uniformity and double refraction comparable to ordinaryoptical glass,it is a necessary optical material with a highly stable optical coeficient when used in severe conditions.
λ8@633nmλ6@633nm<45"<45"20/10~40/2020/10~40/200.2～0.5mm x45°| Material | K9/ultraviolet fused quartz/sapphire/Ge/CaF2/ZnSe,eto. | |
| Surface flatness | K9 | λ10@633nm |
| Ultraviolet quartz | λ10@633nm (standard),λ10@633nm (high precision) | |
| Sapphire | λ10@633nm (standard),λ10@633nm(high precision) | |
| Ge | λ10@633nm | |
| CaF₂ | ||
| ZnSe | ||
| Parallel error | K9 | <30" |
| Ultraviolet quartz | <30" | |
| Sapphire | <30" | |
| Ge | <30" | |
| CaF₂ | ||
| ZnSe | ||
| Thickness tolerance | K9/ultraviolet quartz | ±0.01mm |
| CaF₂ | ±0.03mm | |
| Diameter tolerance | +0.0/-0.1mm,+0.0/-0.2mm(CaF₂) | |
| Surface finish | K9 | 40/20～60-40 |
| Ultraviolet quartz | 40/20～60-40 (standard),10/5～20/10(high precision) | |
| Sapphire | 80-50 (standard),40-20(high precision) | |
| Ge | 40/20～60/40 | |
| CaF₂ | 20/10~40/20 | |
| ZnSe | 20/10~40/20 | |
| Bevel | 0.2～0.5mm x 45° | |