Home / Custom / Optical Components / Cylindrical Mirror / Plano Concave Cylindrical Lens 
A plano-concave cylindrical lens is used to expand light in on-axis. A negative cylindrical lens is able to diverge collimated input light away from a line. Plano-concave cylindrical lenses are used for one-dimensional compression of images, anamorphic beam shaping, and laser line generation.
Optical glass such as K9, fused silica, sapphire, MgF2, silicon (Si), ZnSe, ZnS, etc. These materials possess high transmittance, low absorption, low scattering, uniform refractive index, and specific dispersion characteristics.
Precisely hemispherical. The machining precision of the center and radius of curvature of the sphere is extremely high.
The surface is precision polished to an optical grade of 10-5 to ensure image quality and reduce scattering and aberrations.
An AR coating is typically applied to the concave surface to maximize the transmittance of specific wavelengths of light (e.g. visible light) and reduce reflection loss.
| Commercial | High precision | |
|---|---|---|
| Material | Optical glasses, fused silica, silica, etc. | |
| Diameter | 0.5mm ~ 150mm | |
| Diameter tolerance | ±0.1mm | ±0.02 |
| Focal length | -50mm ~ 2000mm | |
| Focal length tolerance | ±2% (<10mm) | |
| ±0.5% <10mm – 1000mm) | ||
| ±1% (>1000%) | ||
| Centraticon | <3 arc min | <10 arc sec |
| Clear aperture | >85% ~92% of diameter | |
| Surface quality ( Scratch / Dig) | MIL 60/40 | MIL 10/5 |
| Surface accuracy | λ/4@632.8nm | λ/10632.8nm |
| Bevel | 0.05mm~0.2mm x 45° | |
| Coating | Up on customer’s requirement. | |
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