Standard product
| Parameter | Value |
|---|---|
| Material | BK7 / K9 / Fused Silica |
| Design Wavelength | 261-3000nm |
| Paraxial Focal Length | ±2% |
| Centration | 3 arc minutes |
| Clear Aperture | >80% |
| Bevel | 0.25 mm x 45° |
| Surface Quality | 20-10/ 40-20/ 60-40 |
| Surface Figure | λ/4@632.8nm |
Lens types
| Lens | Property and application |
|---|---|
| Plano-Convex Lens | Positive focus length. Suitable when one conjugate is more than five times the other. Also where both conjugates are on the same side of the lens. It is widely used for emitter, detector and laser. |
| Double-Convex Lens | Double-Convex lens are comprised of two convex spherical. Positive focus length. It is widely used for projection system, imaging system and laser measurement system. |
| Double-Concave Lens | Negative lens with the form suited to producing diverging light or a virtual image, where the input light is converging. It is widely used for laser expanding system. |
| Plano-Concave Lens | Negative lens with the form suitable where one conjugates is more than five times the other, e.g. producing divergent light from a collimated input beam. It is widely used for projection system, imaging system and laser measurement system. |
Technical FAQ
Configuration questions for Spherical Lenses
What wavelengths does the Spherical Lenses cover?
Design Wavelength: 261-3000nm. Check the specification at your angle of incidence. Coating bands and grating efficiency curves are quoted at a reference angle, and both shift as that angle changes.
What size is the Spherical Lenses?
Clear Aperture: >80%. Clear aperture is smaller than the physical part, and the mount that holds it takes more again. Size the optic from the beam diameter at that plane, including the margin the mount consumes.
What is the Spherical Lenses made from?
Material: BK7 / K9 / Fused Silica · Surface Quality: 20-10/ 40-20/ 60-40. Substrate and coating decide thermal behaviour and cleaning method as much as optical performance. Confirm both before the optic enters a high-average-power or vacuum path.