Plano Concave Lens 25.4mm Diameter -50mm Focal Length 400 - 1600 nm
SLB-25.4-50NBB
These simple negative lenses have many uses. Alone they form a virtual image of a distant object or collimated light source. Used in combination with other optics they reduce the power of the system. Sharp edges which are common in negative lenses are removed by beveling in order 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 | Plano Concave Lens 25.4mm Diameter -50mm 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 |
| Material | BK7 |
| Focal length f | -50 mm |
| Lens Type | Plano Concave 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 | 5.3 mm |
| Center thickness tc | 2 mm |
| Back focal length fb | -51.3 mm |
| Radius of curvature r | 25.95 mm |
| Centration | ＜1′ |
| Laser Damage Threshold | 3 J/cm2 ( Laser pulse width ; 10ns , Repetition frequency ; 20Hz ) |
In stock
SKU
SLB-25.4-50NBB
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These simple negative lenses have many uses. Alone they form a virtual image of a distant object or collimated light source. Used in combination with other optics they reduce the power of the system. Sharp edges which are common in negative lenses are removed by beveling in order to reduce the likelihood of chipping.