Product type: Flat Lens. Application: Lighting, Medical, Optical, Photography, Astronomy.
Overview
Dia25.4xet9.6mm UV Fused Silica Uncoated Optical Biconcave Lenses: an optical lens made from Optical Glass. Listed geometry: diameter 25.4+0.0/-0.2mm, 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 | Flat Lens |
| Shape | Single-lens |
| Diameter | 25.4+0.0/-0.2mm |
| Transmittance | 90%-95% |
| Coating | HMC |
| Clear aperture | >90% |
| Usage | Lighting, Medical, Optical, Photography, Astronomy |
| Lenses Color | Clear |
| Specifications | Items |
| Center thickness | 2.0mm(REF) |
| Edge thickness | 9.60+0.00/-0.20mm |
| ROC1 | 22.789+/-0.127mm,CC |
| ROC2 | 22.789+/-0.127mm,CC |
| Centerness | <3arcmin |
| Chamfer | <0.2mmx45deg |
| Standard | MIL-PRF-13830B |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Items | Description | |
| Biconcave Lens | Material: | UVFS(JGS1) |
| Diameter: | 25.4+0.0/-0.2mm | |
| Center thickness: | 2.0mm(REF) | |
| Edge thickness: | 9.60+0.00/-0.20mm | |
| ROC1: | 22.789+/-0.127mm,CC | |
| ROC2: | 22.789+/-0.127mm,CC | |
| Surface quality: | S1&S2:40-20 | |
| Centerness: | <3arcmin | |
| Clear aperture: | >90% | |
| Chamfer: | <0.2mmx45deg | |
| 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 “25.4+0.0/-0.2mm”; give diameter, focal length or radii, angles and tolerances.
- Surface figure — quote surface figure (λ) and scratch-dig.
- Centring and edges — listed as “9.60+0.00/-0.20mm”; 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 Optical Glass Polishing for High Clarity Surfaces. For an application example, read Fused Silica Glass Wafers for Precision Appliance Electronics. 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).
