Product type: Concave Lens. Application: Lighting, Medical, Optical, Photography, Laser device. Model: Ball lens.
Overview
UV Fused Silica Optical Biconcave BCX Fiber Coupling Half-sphere/Collimating Lenses: an optical lens made from Fused Silica. Listed geometry: diameter 20.8+0.0/-0.1mm, single-lens shape. Optical / electrical data: transmittance 90%-95%. Coating: Anti-Reflection. Typical applications: Lighting, Medical, Optical, Photography and Laser device. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Fused Silica |
|---|---|
| Type | Concave Lens |
| Shape | Single-lens |
| Diameter | 20.8+0.0/-0.1mm |
| Transmittance | 90%-95% |
| Coating | Anti-Reflection |
| Clear aperture | >90% |
| Usage | Lighting, Medical, Optical, Photography, Laser device |
| Model NO. | Ball lens |
| Lenses Color | Clear |
| Specifications | Items |
| Center thickness | 2.0+/-0.1mm |
| ROC1 | 22.85mm,CC |
| ROC2 | 22.85mm,CC |
| Centerness | <3arcmin |
| Chamfer | <0.25mmx45deg |
| LIDT | >2.5J/cm |
| Standard | MIL-PRF-13830B |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Items | Description | |
| Biconcave Lens | Material: | Fused Silica |
| Diameter: | 20.8+0.0/-0.1mm | |
| Center thickness: | 2.0+/-0.1mm | |
| ROC1: | 22.85mm,CC | |
| ROC2: | 22.85mm,CC | |
| Surface quality: | S1&S2:20-10 | |
| Centerness: | <3arcmin | |
| Clear aperture: | >90% | |
| Chamfer: | <0.25mmx45deg | |
| Standard: | MIL-PRF-13830B |
What to specify when you request a quote
- Material — listed as “Fused Silica”; name the glass or crystal.
- Geometry — listed as “20.8+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 “<0.25mmx45deg”; state centration and edge chamfer.
- Coating — listed as “Anti-Reflection”; list the band and reflectance or transmission target.
Engineering guides for this part
For material grades and coating options, see AR-Coated Glass Materials for High-Transmission Optical Parts. How parts like this are machined and finished is covered in Flat Glass Polishing Process for Precision Substrates. For an application example, read AR Coated Glass for Appliance Touch Screens: Specs and Selection. Before sending a drawing, check Fused Silica Refractive Index: Key to Optical Design Improvement. A related standard product is AR-Coated High-Transparency Optical Glass.
