Plano-Concave Lens
These lenses have one flat surface and one concave surface. They have a negative focal length and are used to diverge incoming light, or to increase focal length in an existing optical system. They can be used in beam expanders and projection systems.
| Diameter |
Dia. Tolerance |
CT Tolerance |
Centering |
Irregularity |
Surface Quality |
Bevel |
| 5.00-25.00 |
+0.00 / -0.10 |
±0.1 |
< 3 minutes |
0.5 Waves |
40-20 |
0.25 x 45° |
| 25.01 - 50.00 |
+0.00 / -0.10 |
±0.1 |
< 3 minutes |
0.5 Waves |
60-40 |
0.50 x 45° |
| 50.01-100.00 |
+0.00 / -0.10 |
±0.1 |
< 3 minutes |
0.5 Waves |
60-40 |
0.50 x 45° |
| Dimensions |
MM |
| Clear Aperture |
CA >= 90% of Diameter |
| Flat Annulus |
Dia < 50 mm - Flat = 0.25 +0/-0.20
Dia > 50 mm - Flat = 0.50 +0/-0.40 |
| Coating |
Uncoated, Specify your coating (See Coating Chart for Available Options) |
| Design Wavelength |
587.6nm |
| Focal Length Tolerance |
±2% |
| Edge Thickness |
Reference |
| * All dimensions are in mm |
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