Biconcave Lens 25.4mm Diameter −99.7mm Focal Length 400 - 1600 nm
SLB-25.4B-100NBB
These biconcave lenses are used when a very high negative power is required. They can be used in a multi-element system or alone to produce a diverging cone or virtual image. Sharpe edges, which are common in negative lenses, are removed by beveling to reduce the likelihood of chipping.
◦This is a BK7 lens with a multi-layer anti-reflection coating for the visible to near-infrared range (400-1600 nm).
◦You can select from a wide variety of options, classified by their outer diameter size and focal length, to meet your specific requirements.
◦You can select from a wide variety of options, classified by their outer diameter size and focal length, to meet your specific requirements.
| Name | Biconcave Lens 25.4mm Diameter −99.7mm Focal Length 400 - 1600 nm |
|---|---|
| Weight | 0.0500kgs |
| Standard Coatings Available | No |
| Guide |
▶Lenses are available in a large selection and in custom sizes and focal lengths. ▶In addition to our standard coating we offer custom anti-reflective coating at specific wavelengths. |
| Diameter φD | 25.4mm |
| Focal length | −99.7mm |
| Material | BK7 |
| Lens Type | Biconcave Lens |
| Design wavelength | 546.1 nm |
| Refractive index | ne=1.519 |
| Coating | Broadband Multilayer antireflection coating ( 400 - 1600 nm ) |
| Wavelength range of Antireflection Coating | 400～1600 nm |
| Transmittance | > Average 96.5% |
| Clear aperture | 85% of the diameter |
| Surface Quality (Scratch-Dig) | 20−10 |
| Edge thickness te | 3.6 mm |
| Center thickness tc | 2 mm |
| Back focal length fb | -100.4 mm |
| Radius of curvature r | 103.8 mm |
| Centration | ＜1′ |
| Laser Damage Threshold | 3 J/cm2 ( Laser pulse width ; 10ns , Repetition frequency ; 20Hz ) |
In stock
SKU
SLB-25.4B-100NBB
Customize product
These biconcave lenses are used when a very high negative power is required. They can be used in a multi-element system or alone to produce a diverging cone or virtual image. Sharpe edges, which are common in negative lenses, are removed by beveling to reduce the likelihood of chipping.