Biconcave Lenses
Biconcave lenses have negative focal lengths and form virtual images.
Biconcave Lenses
Specifications: |
 |
| Material |
BK7 grade A optical glass or Fused silica |
| Design Wavelength |
546.1nm |
| Design Index |
1.5183 ±0.0005 |
| Diameter Tolerance |
+0.0, -0.15mm |
| Paraxial Focal Length |
±2% |
| Centration Tolerance |
3 arc minutes |
| Clear Aperture |
>85% |
| Surface Figure |
λ/4 @ 632.8nm |
| Surface Quality |
60-40 Scratch and Dig |
| Bevel |
0.25 mm x 45° |
List of Product Tables
| Part No. |
Focal Length (mm) |
Diameter (mm) |
Material |
Description |
| XLB-021 |
-10.0 |
5.0 |
BK7 |
Standard |
| XLB-022 |
-10.0 |
8.0 |
BK7 |
Standard |
| XLB-023 |
-10.0 |
6.0 |
Fused silica |
Standard |
| XLB-024 |
-12.5 |
7.5 |
BK7 |
Standard |
| XLB-025 |
-12.5 |
12.5 |
BK7 |
Standard |
| XLB-026 |
-100.0 |
12.5 |
Fused silica |
Standard |
| XLB-027 |
-200.0 |
12.5 |
BK7 |
Standard |
| XLB-028 |
-150.0 |
12.5 |
Fused silica |
Standard |
| XLB-029 |
-175.0 |
12.7 |
BK7 |
Standard |
| XLB-030 |
-18.0 |
15.0 |
BK7 |
Standard |
| XLB-031 |
-50.0 |
20.0 |
BK7 |
Standard |
| XLB-032 |
-100.0 |
25.4 |
BK7 |
Standard |
| XLB-033 |
-200.0 |
25.4 |
BK7 |
Standard |
| XLB-034 |
-250.0 |
25.4 |
BK7 |
Standard |
| XLB-035 |
-100.0 |
30.0 |
BK7 |
Standard |
| XLB-036 |
-1500.0 |
50.0 |
BK7 |
Standard |
| XLB-037 |
-350.0 |
50.8 |
Fused silica |
Standard |
| XLB-038 |
-375.0 |
50.8 |
Fused silica |
Standard |
| XLB-039 |
-750.0 |
60 |
BK7 |
Standard |
| XLB-040 |
-800.0 |
50.8 |
BK7 |
Standard |
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Lenses
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