Product type: Convex Lens. Application: Optical, Infrared Image. Model: STF509.
Overview
CaF2 Crystal Aspherical Lenses is an optical lens made from CaF2. Listed geometry: single-lens shape. Optical / electrical data: transmittance >95%. Coating: Polish+Coating; surface quality 10-5; flatness 1/4lambda. It is used in Optical and Infrared Image. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | CaF2 |
|---|---|
| Type | Convex Lens |
| Shape | Single-lens |
| Transmittance | >95% |
| Coating | Polish+Coating |
| Surface Quality | 10-5 |
| Flatness | 1/4lambda |
| Usage | Optical, Infrared Image |
| Model NO. | STF509 |
| Lenses Color | Clear |
| Tolereance | +0.00/-0.01mm |
| Certeration | <1arcmin |
| PV | <1um |
| RMS | <1um |
| Supplier | Changchun Sunday Optics Co., Ltd. |
Technical data
| Structure | Aspheric lens,Cylindrical Aspheric lens,Spherical Aspheric lens |
|---|---|
| Material | Optical glass, JGS1,Germanium, Silicon, ZnSE,CaF2 |
| Diameters Available | 5mm to 600mm |
| Diameter Tolerance | +0.00/-0.02mm or customer design |
| Surface Quality | 10-5 |
| PV | 0.5-10um |
| Thickness tolerance | +0/-0.02mm |
| Clear Aperture | >90% of Diameter |
| Chamfer | 0.05-0.5mmx45degree,according to customer's needs. |
| Centeration | 3 arcmin |
| Coating | Single Mag2, Multiple Layers AR Coating A:350-650nm B:650-1050nm C:1050-1585nm D: Customer Design |
What to specify when you request a quote
- Material — listed as “CaF2”; name the glass or crystal.
- Geometry — give diameter, focal length or radii, angles and tolerances.
- Surface figure — listed as “10-5”; quote surface figure (λ) and scratch-dig.
- Centring and edges — state centration and edge chamfer.
- Coating — listed as “Polish+Coating”; list the band and reflectance or transmission target.
Engineering guides for this part
For material grades and coating options, see Fused Silica Wafer Material Selection for Precision Glass Processing. How parts like this are machined and finished is covered in Optical Glass Polishing for High Clarity Surfaces. For an application example, read Boost Yield with Fused Silica Viewports for Vacuum and Optical Systems. Before sending a drawing, check Fused Silica Refractive Index: Key to Optical Design Improvement. A related standard product is Infrared Windows.
