MSE PRO BK7 Bi-Concave Lenses with 1/4 Wave MgF2 Coating@550nm, Ø2"
SKU: ACB7BC5-2--250
MSE PRO™ BK7 Bi-Concave Lenses with 1/4 Wave
MgF2 Coating@550nm, Ø2"
MSE supplies offers Ø2" BK7 Bi-Concave Lenses with 1/4 Wave MgF2 Coating@550nm. Similar to plano- concave lenses, a bi-concave lens diverges parallel input rays and has a negative focal length. It has a virtual focus at the object side of the lens. Bi-concave lenses are usually suitable for absolute conjugate ratios closer to 1:1.
MSE Supplies can offer a variety of optical elements, with different focal length and coating options. Please contact us for customization or bulk orders.
Technical Data:
| Material | BK7 grade A, fine annealed |
| Diameter (Ø) Tolerance | +0.0/-0.20 |
| Center Thickness (Tc) | ±0.1 |
| Centration | 3’ |
| Form Error | 1 ～ 5 fringes |
| Irregularity of Fringes | 0.2 ～ 0.5 fringes |
| Surface Quality | 60-40 scratch-dig |
| Clear Aperture | 90% diameter |
