Near-Infrared Antireflection-Coated Aspheric Lens
Aspheric lenses use a single-element design to reduce lens count in multielement assemblies. Unlike conventional spherical lenses, their more complex surfaces have continuously varying curvature from center to edge. Fewer elements reduce system size and weight and simplify assembly. The greatest advantage is correction of spherical aberration in collimating and focusing systems. Adjusting conic constants and aspheric coefficients minimizes spherical aberration. Aspheres bring rays to one point for optical quality, essentially eliminating the blurred imaging caused by spherical lenses focusing rays at different points. Integrating aspheres, for example to focus laser diode output, reduces total cost and can outperform conventional spherical assemblies. Materials, wavelengths, and coatings can be custom-designed.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material | BK7, Fused Silica, Calcium Fluoride CaF2, Optical Glass, etc. |
| Design Wavelength [Customizable on Request] | 355nm, 520nm, 786nm, 1030nm, 1064nm, 1080nm (Customizable as Required) |
| Focal Length Tolerance | ±1% |
| Size Range | φ15-400mm |
| Shape Tolerance | +0.00/-0.10mm |
| Thickness Tolerance | ±0.05mm |
| Surface Figure Accuracy [After Optimization] | PV After Optimization <0.15μm |
| Effective Aperture | >90% |
| Surface Finish | 20-10 |
| Centration Error | ≤5 arcsec |
| Decentration | <90° |
| Processing Method | CNC |
Datasheet
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