Request a quote Bi-Concave Lenses
Precision bi-concave lenses for beam expansion and image reduction.
Typical Specifications
| Material | N-BK7 / H-K9L |
|---|---|
| Design Wavelength | 632.8 nm |
| Focal Length Tolerance | ±1% |
| Diameter Tolerance | +0.0 / −0.1 mm |
| Center Thickness Tolerance | ±0.1 mm |
| Surface Figure | λ/4 @ 632.8 nm |
| Surface Quality | 40-20 Scratch-Dig |
| Centration | <1 arcmin |
| Clear Aperture | >90% |
| Bevel | <0.2 mm × 45° |
| Coating | Custom Coatings Available |
Other specifications, materials, and coatings are available upon request.