Product type: Concave Lens. Application: Lighting, Medical, Optical, Photography, Astronomy.
Overview
The Dia12.7mm CaF2 Uncoated Optical Plano Concave Lenses is supplied as an optical lens made from Optical Glass. Listed geometry: diameter 12.7+0.0/-0.1mm, single-lens shape. Optical / electrical data: transmittance 90%-95%. Coating: HMC. Listed for Lighting, Medical, Optical, Photography and Astronomy applications. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Optical Glass |
|---|---|
| Type | Concave Lens |
| Shape | Single-lens |
| Diameter | 12.7+0.0/-0.1mm |
| Transmittance | 90%-95% |
| Coating | HMC |
| Clear Aperture | >90% |
| Usage | Lighting, Medical, Optical, Photography, Astronomy |
| Lenses Color | Clear |
| Specifications | Items |
| Center thickness | 2.0+/-0.1mm |
| R1 | 10.82mm,CC |
| R2 | infinity |
| Centerness | <3arcmin |
| Chamfer | <0.25mmx45deg |
| Standard | MIL-PRF-13830B |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Items | Description | |
| Plano concave lens | Material: | CaF2,Monocrystalline |
| Diameter: | 12.7+0.0/-0.1mm | |
| Center thickness: | 2.0+/-0.1mm | |
| R1: | 10.82mm,CC | |
| R2: | infinity | |
| Surface quality: | S1&S2:40-20 | |
| Centerness: | <3arcmin | |
| Clear Aperture: | >90% | |
| Chamfer: | <0.25mmx45deg | |
| Coating: | uncoated | |
| Standard: | MIL-PRF-13830B |
What to specify when you request a quote
- Material — listed as “Optical Glass”; name the glass or crystal.
- Geometry — listed as “12.7+0.0/-0.1mm”; give diameter, focal length or radii, angles and tolerances.
- Surface figure — quote surface figure (λ) and scratch-dig.
- Centring and edges — listed as “<0.25mmx45deg”; 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 Selecting Fused Silica and Quartz Glass for Precision Components. How parts like this are machined and finished is covered in Flat Glass Polishing Process for Precision Substrates. 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.
