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Achromatic Lens
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Doublet lens, 25.4mm Dia.x80 EFL, Quality achromatic doublet lenses
Changchun Long Ze Precision Optics Co., Ltd Time：2018-11-22
| Part Number | LAD8025.4 | ||
| Diameter (mm): | 25.4 | Diameter Tolerance (mm): | +0.01/-0.10 |
| Effective Focal Length EFL (mm): | 80 | Back Focal Length BFL (mm): | 75.49 |
| Substrate: | N-BK7/N-SF2 or or equivalent | Surface Quality: | 60-40 |
| Power (P-V) @ 632.8nm: | 1.5λ | Irregularity (P-V) @ 632.8nm: | 0.25 Waves |
| Focal Length Tolerance (%): | ±2% | Centering (arcmin): | < 3 minutes |
| Center Thickness CT (mm): | 8.2 | Center Thickness Tolerance (mm): | ±0.2 |
| Edge Thickness ET (mm): | 5.8 | Clear Aperture CA (mm): | >= 90% of Diameter |
| Type: | Achromats | Bevel: | Protective bevel as needed |
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