Product type: Doublet Lens. Model: Glued lens.
Overview
Dia19.5mm (AR) Coated Optical Achromatic Doublet Lens: an optical lens made from Schott N-LAF34 & Schott N-SF2. Listed geometry: diameter 19.50+0.00/-0.02mm. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Schott N-LAF34 & Schott N-SF2 |
|---|---|
| Type | Doublet Lens |
| Diameter | 19.50+0.00/-0.02mm |
| Clear Aperture | >92% |
| Model NO. | Glued lens |
| Center thickness | 10.75+/-0.15mm |
| ROC1 | 23.032mm+/-0.1%,CX |
| ROC2=ROC3 | 17.378mm+/-0.1%,Doublet |
| ROC4 | 15.2mm+/-0.1%,CX |
| Centerness | <0.01mm |
| Chamfer | <0.2mmx45deg |
| Supplier | CPG OPTICS LIMITED |
What to specify when you request a quote
- Material — listed as “Schott N-LAF34 & Schott N-SF2”; name the glass or crystal.
- Geometry — listed as “19.50+0.00/-0.02mm”; give diameter, focal length or radii, angles and tolerances.
- Surface figure — quote surface figure (λ) and scratch-dig.
- Centring and edges — listed as “<0.2mmx45deg”; state centration and edge chamfer.
- Coating — 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.
