Dvipusiai įgaubti lęšiai
Dvipusiai įgaubti lęšiai
| BK7, FS, UVFS, CaF2, ZnSe, Si, Ge |
| +0.0/-0.1 mm |
| ±0.1 mm |
| >90% |
| ±3 % |
| 632.8 nm |
| 40-20 S-D |
| <λ/4 @ 632.8 nm |
| <3 arcmin |
| <0.25 mm x 45° |
| Available on request |
The biconcave lenses are used in optical systems in combination with other lenses. These lenses also work as beam expanders, optical character readers,
viewers and projection systems. Under customer request anti-reflection or other types of coatings can applied.
 |
Lower spherical aberrations than for Plano-Concave lenses |
|
Diverges incident light |
|
Ideal for Experimenting and Prototyping Applications |
Properties (Diameter D, Focal length L)
| D, mm | D, Inches | L Minimal, mm | L Maximal, mm | | 12,7
| 0.5
| -12
| -10.000
| | 25,4
| 1
| -25
| -10.000
| | 38,1
| 1.5
| -40
| -10.000
| | 50,8
| 2
| -50
| -10.000
| | 76,2 | 3 | -75 | -10.000 |
|
| Altechna metrology lab applies following product inspection: |
| Visual inspection – surface quality evaluation according to MIL 13830 and ISO 10110 standards |
| Dimensions – measurement of geometrical dimensions, as diameter, thickness, etc. |
| Radius of Curvature (Spherometer)* |
| Effective Focal Length (Spherometer) |
| Centering (Centration unit) |
| Irregularity (Interferometer) |
| Wavefront distortion (Interferometer) |
*(…) used equipment
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Pasirinkite iš 33 Dvipusiai įgaubti lęšiai
