Chinese
KL14-004-004 Double-Concave Lenses
Diameter:4mm; focallength:-4mm
Delivery Time : 2-3 weeks
US$24.82
In stock
SKU
KL171
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) | 4 |
| Effective focal length EFL(mm) | -4 |
| Back Focus length BFL(mm) | -4.32 |
| Center Thickness CT(mm) | 1 |
| Edge Thickness ET(mm) | 1.99 |
| R1=-R2(mm) | -4.3 |
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