Features
- Diffraction-Limited On-Axis Performance
- AR Coated for the 8 - 12 µm Range
- Designs Incorporate ZnSe and ZnS Substrates
- Engraved Ø1" Mount for SM1 Compatiblity
This AR-coated, air-spaced achromatic doublet lens provide excellent transmission in the 8 - 12 µm range. It incorporates two AR-coated lenses, one with a zinc selenide substrate and another with a zinc sulfide substrate. Each achromatic doublet has three design wavelengths: 8 µm, 10 µm, and 12 µm. By optimizing the design for these three wavelengths, the focal shift across the 8 - 12 µm range will be minimized, providing excellent on-axis performance.
Thorlabs' LWIR achromatic doublets are pre-mounted in engraved Ø1" outer diameter mounts, making it easy to incorporate this optic into your setup. Each engraving includes the part number, AR coating range, focal length, an arrow indicating the direction of light propagation to collimate a point source, and an infinity symbol denoting that this lens has an infinite conjugate ratio.
Specifications
- Diameter: Ø1" (Ø25.4 mm)
- Dimension Tolerance: +0.00/-0.10
- Centration: <3 arcmin
- Clear Aperture: >80% of Diameter
- Spot Size: Diffraction Limited On Axis
- Design Wavelengths: 8 µm, 10 µm, and 12 µm
- Antireflection Coating: Ravg < 1.5% from 8 to 12 µm, 0° AOI
- Substrates: Zinc Selenide and Zinc Sulfide
- RMS WFE:
- Surface Quality: 60-40 Scratch-Dig
- Effective Focal Length: 200 mm @ 10 µm
- Effective Focal Length Tolerance: ±1.0% @ 10 µm
- Working Distance (WD): 194.3 mm @ 10 µm
- Housing Thickness (T): 10.0 mm
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