The PAC070 Precision Achromatic Doublet Lens is a 400 to 700 nm antireflection coated, 3/4 inch (38.1 mm) diameter, BaF N10 and SF 10 precision achromatic doublet lens with an effective focal length of 125 mm. This achromat is computer designed to effectively minimize spherical aberration and coma when operating at infinite conjugate ratio, yielding smaller focused spot sizes. Unlike singlet lenses, this results in a constant focal length independent of aperture and far better off-axis performance. Achromats are superior to singlet lenses for monochromatic applications at any visible wavelength.
| Model | PAC074 |
|---|---|
| Type | Achromatic Doublet |
| Shape | Spherical |
| Material | Optical crown and flint glasses |
| Diameter | 1.5 in. (38.1 mm) |
| Diameter Tolerance | +0/-0.1 mm |
| Center Thickness (Tc) Tolerance | ± 0.2 mm |
| Tc | 12.4 mm |
| Tc1 | 9.2 mm |
| Te | 9.9 mm |
| Clear Aperture | ≥central 90% of diameter |
| Focal Length | ±2 % |
| FFL | 124.4 mm |
| BFL | 118.2 mm |
| Effective Focal Length | 125 mm |
| Antireflection Coating | 400-700 nm (MgF2 AR coating) |
| Transmission | T>95% visible, T>92% at 1064 nm |
| Cleaning | Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended |
| Damage Threshold | 750 W/cm2 CW, 0.75 J/cm2 with 10 nsec pulses, typical, cement limitation |
| Surface Quality | 40-20 scratch-dig |
