Plano-Concave Lens, CaF₂, Uncoated: 180-8000 nm OLE240744M
This JCOPTIX plano-concave lens is made from calcium fluoride, commonly used where high transmission is required in both infrared and ultraviolet. Its extremely high laser damage threshold supports excimer lasers. The material has a low refractive index of 1.35-1.51 over 180-8000 nm, good chemical inertness, and high hardness compared with similar barium, magnesium, and lithium fluorides. JCOPTIX offers a diameter of 25.4 mm. Contact technical support for other custom requirements. Plano-concave lenses, CaF₂, uncoated 180-8000 nm, installed in standard SM1 lens tubes: OLE240740M and OLE240744M. Plano-concave lenses, CaF₂, uncoated 180-8000 nm: OLE240740 and OLE240744.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Optical element material | CaF₂ |
| Diameter | 25.4 mm |
| Clear Aperture Dimension [of Outer Diameter] | >90% of Outer Diameter |
| Operating Wavelength | 180-8000 nm |
| Focal Length | -100.0 mm |
| Back focal length | -102.1 mm |
| Optical power | -10.0 |
| Abbe Number v_d | v_d = 94.9958544133 |
| Design Wavelength | 587.6 nm |
| Refractive Index | 1.43384927882 |
| Radius | -43.4 |
| Center Thickness | 3 mm |
| Edge Thickness | 4.9 mm |
| Coating | Uncoated |
| Diameter Tolerance | +0.0/-0.1 mm |
| Thickness Tolerance | ± 0.1 mm |
| Focal Length Tolerance | ± 1% |
| Decentration | < 3 arcmin |
| Surface figure PV value | λ/2 |
| Spherical surface fringe count | 3 |
| Surface flatness [@633 nm] | λ/2 |
| Surface quality (scratch/dig) | 40/20 |
Key Features
Datasheet
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