Product type: Concave Lens. Application: Lighting, Medical, Optical, Photography, Astronomy.
Overview
The Dia50.8mm Fused Silica Hr Coated Optical Plano-Concave Lens is supplied as an optical lens made from Optical Glass. Listed geometry: diameter 50.8+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 | 50.8+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 | 5.0+/-0.1mm |
| ROC1 | 20000+/-5.5%mm,CC |
| ROC2 | infinity |
| S2 | fine grinded |
| Centerness | <3arcmin |
| Chamfer | 0.1-0.3mmx45deg |
| Chips | <0.1mm |
| Standard | MIL-PRF-13830 |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Items | Description | |
| Plano-concave lens | Material: | UVFS(Corning 7980 0F) |
| Diameter: | 50.8+0.0/-0.1mm | |
| Center thickness: | 5.0+/-0.1mm | |
| ROC1: | 20000+/-5.5%mm,CC | |
| ROC2: | infinity | |
| Surface quality: | S1:60-40 | |
| S2:fine grinded | ||
| Centerness: | <3arcmin | |
| Clear Aperture: | >90% | |
| Chamfer: | 0.1-0.3mmx45deg | |
| Chips:<0.1mm | ||
| Standard: | MIL-PRF-13830 |
What to specify when you request a quote
- Material — listed as “Optical Glass”; name the glass or crystal.
- Geometry — listed as “50.8+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 “0.1-0.3mmx45deg”; 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 and Quartz Glass: Selecting Materials for Precision Components. 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 Fused Silica Glass Wafers (2–12", JGS1/JGS2).
