BK7 Bi-Convex Lenses
These symmetrical lenses also possess positive focal lengths and produce real images of distinct objects. However theses lenses minimize the spherical aberrations for nearly symmetrical positions of the conjugate points with respect to the lens. For exactly symmetrical imaging with a 1:1 magnification not only the spherical aberration is minimized, but also coma and distortion are completely eliminated. As a rule of thumb the bi-convex lenses are best used for magnifications between 1/5 and 5.
| Material: | BK7 |
| Focal Length: | +/- 2 % |
| Design Wavelength: | 546,1 nm |
| Diameter Tolerance: | +0/- 0.2 mm |
| Centering: | < 5 min. of arc |
| Wavefront Distortion: | λ/10 |
| Clear Aperture: | 90 % of diameter |
| Surface Quality: | S/D 10-5 |
| Antireflection Coating: | on request |
| Lens mounted in cell: | on request |
Other dimensions and focal lengths on request: list of radii
Prices on request
| Part-No. | Diameter | Focal Length |
|---|---|---|
| LBX0.5"B/25 | 0.5" | 25 mm |
| LBX0.5"B/40 | 0.5" | 40 mm |
| LBX0.5"B/50 | 0.5" | 50 mm |
| LBX0.5"B/60 | 0.5" | 60 mm |
| LBX0.5"B/75 | 0.5" | 75 mm |
| LBX0.5"B/100 | 0.5" | 100 mm |
| LBX0.5"B/125 | 0.5" | 125 mm |
| LBX0.5"B/150 | 0.5" | 150 mm |
| LBX0.5"B/200 | 0.5" | 200 mm |
| LBX0.5"B/250 | 0.5" | 250 mm |
| LBX0.5"B/300 | 0.5" | 300 mm |
| LBX0.5"B/400 | 0.5" | 400 mm |
| LBX0.5"B/500 | 0.5" | 500 mm |
| LBX1"B/25 | 1" | 25 mm |
| LBX1"B/40 | 1" | 40 mm |
| LBX1"B/50 | 1" | 50 mm |
| LBX1"B/60 | 1" | 60 mm |
| LBX1"B/75 | 1" | 75 mm |
| LBX1"B/100 | 1" | 100 mm |
| LBX1"B/150 | 1" | 150 mm |
| LBX1"B/200 | 1" | 200 mm |
| LBX1"B/250 | 1" | 250 mm |
| LBX1"B/300 | 1" | 300 mm |
| LBX1"B/500 | 1" | 500 mm |
| LBX1"B/700 | 1" | 700 mm |
| LBX1"B/1000 | 1" | 1000 mm |
| LBX2"B/75 | 2" | 75 mm |
| LBX2"B/100 | 2" | 100 mm |
| LBX2"B/150 | 2" | 150 mm |
| LBX2"B/200 | 2" | 200 mm |
| LBX2"B/300 | 2" | 300 mm |
| LBX2"B/400 | 2" | 400 mm |
| LBX2"B/500 | 2" | 500 mm |
| LBX2"B/750 | 2" | 750 mm |
| LBX2"B/1000 | 2" | 1000 mm |