Product type: Achromatic Lens. Application: Lighting, Medical, Optical, Photography, Astronomy.
Overview
Diameter 68mm Coated Optical Positive Doublet Achromatic Lens is an optical lens made from Optical Glass. Listed geometry: diameter 68.00+0.00/-0.03mm, doublet lens shape. Optical / electrical data: transmittance 90%-95%. Coating: Anti-Reflection; surface quality 40-20; flatness 2fr,PWR;0.5fr,IRR,S1. Typical applications: Lighting, Medical, Optical, Photography and Astronomy. 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 | Achromatic Lens |
| Shape | Doublet Lens |
| Diameter | 68.00+0.00/-0.03mm |
| Transmittance | 90%-95% |
| Coating | Anti-Reflection |
| Surface quality | 40-20 |
| Flatness | 2fr,PWR;0.5fr,IRR,S1 |
| Clear aperture | >D62mm |
| Usage | Lighting, Medical, Optical, Photography, Astronomy |
| Lenses Color | Clear |
| Specifications | Description |
| Center thickness | 12.80+/-0.10mm |
| ROC1 | 445.131+/-0.08%mm CX |
| ROC2=ROC3 | 91.897+/-0.08%mm DOUBLET |
| ROC4 | 1433.855+/-0.08%mm CX |
| Centerness | <1arcmin |
| Chamfer | protected |
| AR coating,T>98.5%@1572nm,T>99%@400-700nm,AOI | 0+/-20deg,S1&S4 |
| Standard | MIL-PRF-13830B |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Description | |
|---|---|
| Material: | Schott N-SSK2 |
| Schott N-KZFS11 | |
| Diameter: | 68.00+0.00/-0.03mm |
| Center thickness: | 12.80+/-0.10mm |
| ROC1: | 445.131+/-0.08%mm CX |
| ROC2=ROC3: | 91.897+/-0.08%mm DOUBLET |
| ROC4: | 1433.855+/-0.08%mm CX |
| Flatness: | 2fr,PWR;0.5fr,IRR,S1 |
| 0.5fr,PWR;0.5fr,IRR,S4 | |
| Surface quality: | 40-20 |
| Centerness: | <1arcmin |
| Clear aperture: | >D62mm |
| Chamfer: | protected |
| 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 “68.00+0.00/-0.03mm”; give diameter, focal length or radii, angles and tolerances.
- Surface figure — listed as “40-20”; quote surface figure (λ) and scratch-dig.
- Centring and edges — listed as “protected”; 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 Optical Glass Polishing for High Clarity Surfaces. 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.
