A biconcave spherical lens consists of two concave spherical surfaces with a negative focal length. It is typically used for reducing image size and diverging beams. It is widely used in display systems, projection systems, laser measurement, optical imaging, and beam control.
Design Index
| Specifications | |
| Material | BK7 |
| Design Wavelength | 546.1nm |
| Design Index | 1.5183+/-0.0005 |
| Diameter Tolerance | +0.0，-0.15mm |
| Paraxial Focal Length Tolerance | +/-2% |
| Centration | 3 arc minute |
| Clear Aperture | >85% |
| Surface Figure | λ/4@632.8nm |
| Surface Quality | 60/40 |
| Bevel | 0.25mm*45° |
| Coating | Uncoated |
| Specifications | |
| Material | BK7 |
| Design Wavelength | 546.1nm |
| Design Index | 1.5183+/-0.0005 |
| Diameter Tolerance | +0.0，-0.15mm |
| Paraxial Focal Length Tolerance | +/-2% |
| Centration | 3 arc minute |
| Clear Aperture | >85% |
| Surface Figure | λ/4@632.8nm |
| Surface Quality | 60/40 |
| Bevel | 0.25mm*45° |
| Coating | Uncoated |
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