The KPX178AR.14 BK7 Precision Plano-Convex Lens is a 430 to 700 nm anti-reflection coated, 2 inch (50.8 mm) diameter, BK 7 plano-convex lens with an effective focal length of 62.9 mm. It has ≤ λ/4 surface irregularity, 40-20 scratch-dig, and is designed to meet the demanding requirements of laser electro-optic applications. It is manufactured from fine annealed optical glass and polished to tight tolerances using master test plates ensures minimum wavefront distortion. Tight surface quality tolerances minimize scatter and unwanted diffraction effects. BK 7 is an excellent material for most visible and near infrared applications. It is the most common optical glass, and it provides great performance at a good value.
| Model | KPX178AR.14 |
|---|---|
| Lens Type | Spherical |
| Lens Shape | Plano-Convex |
| Effective Focal Length | 62.9 mm |
| Diameter | 2.00 in. (50.8 mm) |
| Antireflection Coating | 430-700 nm (AR.14) |
| Lens Material | Grade A BK 7 |
| Center Thickness (Tc) Tolerance | ±0.1 mm |
| f/# | 1.2 |
| Surface Quality | 40-20 scratch-dig |
| Wavelength Range | 430 to 700 nm |
| Diameter Tolerance | +0/-0.1 mm |
| Te | 3.0 mm |
| Edge Thickness (Te) Tolerance | 3.0 mm, nominal |
| Focal length tolerance | ±1 % |
| BFL | 52.86 mm |
| FFL | 62.90 mm |
| Radius of Curvature | 32.507 mm |
| P2 | -10.03 mm |
| Clear Aperture | ≥central 90% of diameter |
| Centration, Spherical Lenses | ≤3 arc min |
| Surface Accuracy, Power (lambda) | 1.5 λ |
| Chamfers | 0–0.8 mm face width |
| Chamfers Angle/Tolerance | 45° ±15°, typical |
| Cleaning | Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended |
