Product type: Concave Lens. Application: Lighting, Medical, Optical, Photography, Astronomy. Model: Spherical lens.
Overview
Dia6mm N-BK7 905nm AR Coated Optical Plano Concave Lens is an optical lens made from Optical Glass. Listed geometry: diameter 6.0+0.0/-0.03mm, 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 | 6.0+0.0/-0.03mm |
| Transmittance | 90%-95% |
| Coating | HMC |
| Usage | Lighting, Medical, Optical, Photography, Astronomy |
| Model NO. | Spherical lens |
| Lenses Color | Clear |
| Specifications | Items |
| Center thickness | 1.0+/-0.10mm |
| ROC1 | 4.31826mm |
| ROC2 | infinity |
| S1&S2 | 3×0.16 |
| Centerness | <4arcmin |
| Chamfer | protected |
| Standard | ISO 10110 |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Items | Description | |
| Plano-concave lens | Material: | Schott N-BK7 |
| Diameter: | 6.0+0.0/-0.03mm | |
| 4.20+/-0.20mm | ||
| Center thickness: | 1.0+/-0.10mm | |
| ROC1: | 4.31826mm | |
| ROC2: | infinity | |
| Surface quality: | S1&S2:3×0.16 | |
| Centerness: | <4arcmin | |
| Clear Aperture: | S1:>D2.8mm | |
| S2:>D3.5mm | ||
| Chamfer: | protected | |
| Standard: | ISO 10110 |
What to specify when you request a quote
- Material — listed as “Optical Glass”; name the glass or crystal.
- Geometry — listed as “6.0+0.0/-0.03mm”; give diameter, focal length or radii, angles and tolerances.
- Surface figure — quote surface figure (λ) and scratch-dig.
- Centring and edges — listed as “protected”; 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 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.
