NIR II Coated Double-Concave (DCV) Lenses
Original price was: $38.00.$26.60Current price is: $26.60.
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TECHSPEC® NIR II Coated Double-Concave (DCV) Lenses are designed to have two inward curved surfaces and a negative focal length similar to Plano-Concave (PCV) lenses. These lenses can be used for balancing aberrations created by other lenses within a system due to their negative spherical aberration. Double-Concave (DCV) lenses are commonly used in a variety of applications including image reduction, beam expansion and telescopes. TECHSPEC® NIR II Coated Double-Concave (DCV) Lenses offer optimal performance in the 750nm to 1550nm range. These lenses are also available Uncoated, VIS-EXT, MgF2, VIS 0°, VIS-NIR, or with NIR I AR coating options.
- AR Coated to Provide <0.7% Reflectance per Surface for 750 – 1550nm
- Double-Concave Lenses Have Two Inward Curved Surfaces and a Negative Focal Length
- Used for Image Reduction and to Spread Light
- Various Coating Options: Uncoated, VIS-EXT, MgF2, VIS 0°, VIS-NIR, and NIR I
| Coating | NIR II (750-1550nm) |
|---|---|
| Wavelength Range (nm) | 750 – 1550 |
| Coating Specification | Rabs ≤1.5% @ 750 – 800nmRabs ≤1.0% @ 800 – 1550nmRavg ≤0.7% @ 750 – 1550nm |
| Focal Length Specification Wavelength (nm) | 587.6 |
| Focal Length Tolerance (%) | ±1.00 |
| Surface Quality | 40-20 |
| Power (P-V) @ 632.8nm | 1.5λ |
| Irregularity (P-V) @ 632.8nm | λ/4 |
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