Product type: Flat Lens. Application: Camera Lens. Model: tnn-liu.
Overview
High-Quality Plano-Convex Lens for CO2 Laser Cutting and Engraving Systems, Znse is an optical lens made from Glass. Listed geometry: diameter +0/-0.01 or as Required, thickness as Required, single-lens shape. Optical / electrical data: transmittance >95%. Coating: HMC; surface quality 40-20 or Better. Typical applications: Camera Lens. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Glass |
|---|---|
| Type | Flat Lens |
| Shape | Single-lens |
| Thickness | as Required |
| Transmittance | >95% |
| Coating | HMC |
| Surface Quality | 40-20 or Better |
| Usage | Camera Lens |
| Model NO. | tnn-liu |
| Lenses Color | Clear |
| Diameter Tolerance | +0/-0.01 or as Required |
| Bevel | Protective Bevel as Needed Products Learn More |
| Precison | +0.00/-0.10mm | High Precision: +0.00/-0.02mm |
| Supplier | UNIVERSAL POWER LIMITED |
Technical data
| Product Name | Zinc Selenide (ZnSe) |
|---|---|
| Substrate Material | Plano-Convex (PCV) Lens |
| Index of Refraction (nd) | Not Defined |
| Thermal Expansion Coefficient (CTE) | 7.1×10-6/ºC at 273K |
| Diameter Tolerance | Precison: +0.00/-0.10mm | High Precision: +0.00/-0.02mm |
| Center Thickness Tolerance | Precison: +/-0.10 mm | High Precision: +/-0.02 mm |
| Focal Length Tolerance | +/- 1% |
| Surface Quality (Scratch-Dig) | Precison: 60-40 | High Precision: 40-20 |
| Surface Flatness (Plano Side) | λ/4 |
| Spherical Surface Power (Convex Side) | 3 λ/4 |
| Surface Irregularity (Peak to Valley) | λ/4 |
| Centration | Precison: <3 arcmin | High Precision: < 30 arcsec |
| Clear Aperture | 80% of Diameter |
| AR Coating Range | 2 µm – 13 μm / 4.5 – 7.5 μm / 8 – 12 μm |
| Design Wavelength | 10.6 μm |
What to specify when you request a quote
- Material — listed as “Glass”; name the glass or crystal.
- Geometry — listed as “+0/-0.01 or as Required”; give diameter, focal length or radii, angles and tolerances.
- Surface figure — listed as “40-20 or Better”; quote surface figure (λ) and scratch-dig.
- Centring and edges — listed as “Protective Bevel as Needed Products Learn More”; state centration and edge chamfer.
- Coating — listed as “HMC”; list the band and reflectance or transmission target.
Engineering guides for this part
For material grades and coating options, see Fused Silica Windows for UV and Laser Optical Systems. How parts like this are machined and finished is covered in Flat Glass Polishing Process for Precision Substrates. For an application example, read How to Handle and Maintain Precision Glass Components in Laser Systems. Before sending a drawing, check Fused Silica Refractive Index: Key to Optical Design Improvement. A related standard product is Infrared Windows.
