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Instruments - Instrument Accessories |
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| Varsal Lenses |
| Specifications: Singlet, Doublet, Achromat, Ball Lens, Drum Lens, Cylindrical Lens |
| Tolerance |
Commercial |
Precision |
| Diameter (mm) |
+0.00/-0.10mm |
+0.00/-0.05mm |
| Center Thickness (mm) |
+/-0.20mm |
+/-0.05mm |
| Radius (mm) |
+/-0.5% |
+/-0.1% |
| Power-Irregularity (fringe) |
3-5 |
1-3 |
| Wedge Lens (TIM, mm)-Centration |
0.05mm |
0.010mm |
| Bevels (Max face width@45°, mm) |
0.5mm |
0.1mm |
| Scratch-Dig |
80/50 |
60/40-40/20 |
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| Note: |
1: The radius tolerance depends on the radius value. For small radii,
we manufacture test plates by producing balls, with which we can
reach tolerances of +/-1~3μm. |
| | 2: We can produce lenses with diameters 1mm~250mm
and 0.5mm~20mm for Ball Lenses. |
| | 3: We use the Chinese equivalent material to Schott's
optical glass and assure the material quality. Other special materials
(Fused Silica, Quartz, CaF2, etc.) are also frequently used. |
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