Chinese
KL13-025-050 Plano-Concave Lenses
Diameter:25mm; focallength:-50mm
Delivery Time : 2-3 weeks
US$17.87
In stock
SKU
KL138
Material:K9 Precision Annealedoptical glass
Design Wavelength:587.6nm
Diameter Tolerance:+0.0/-0.1mm
Center Thickness Tolerance:±0.2mm
Surace Figure:λ/4 @632.8nm
focallength Tolerance:±2%
Centering Tolerance:3 arc minutes
Surface Quality:3~4 level
Bevel:0.2mmX45°
Coatings:Please see the coating list
| Drawing |  |
|---|---|
| Diameter Dia(mm) | 25 |
| Effective focal length EFL(mm) | -50 |
| Back Focus length BFL(mm) | -51.36 |
| Radius R1(mm) | -25.84 |
| Center Thickness CT(mm) | 2 |
| Edge Thickness ET(mm) | 5.22 |
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