Product introductionPlano concave lenses, which have a negative focal length, are used to diverge a beam of parallel light. The concave lens is spherical on one side and flat on the other. The middle is thinner than the two sides.Design Wavelengths1016 nm, 1330 nm, and 1550 nmAR Coating Range1050 - ......

| Design Wavelengths | 1016 nm, 1330 nm, and 1550 nm | 
| AR Coating Range | 1050 - 1700 nm | 
| Reflectance over AR Coating Range (0° AOI) | Ravg < 0.5% | 
| Diameters Available | 5 mm, 6 mm, 6.35 mm, 8 mm, 1/2, 1, 30 mm, or 2" | 
| Diameter Tolerance | +0.00/-0.10 mm | 
| Focal Length Tolerance | ±1% | 
| Surface Quality | 40-20 Scratch-Dig | 
| Spherical Surface Powera | 3λ/2 | 
| Spherical Surface Irregularity (Peak to Valley) | λ/4 | 
| Centration | <3 arcmin | 
| Clear Aperture | >90% of Diameter | 


 
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