INFRARED Singlet Lenses
EO ADVANTAGE:
• Germanium (Ge), Zinc Selenide (ZnSe), Silicon (Si), and Calcium Fluoride (CaF2) Lenses Available
• Plano Convex, Meniscus, and Aspheric Shapes
• Wide Variety of Coating Options
Size Range Focal Length Range Wavelength Range Coating Options
Zinc Selenide (ZnSe) PCX Lenses 12.7 - 50.8mm 12.7 - 250mm 0.60 to 18.0μm Uncoated or 2 AR Options
Germanium (Ge) PCX Lenses 25.0 - 50.0mm 25.0 - 250mm 2.0 to 14.0μm Uncoated or 3 AR Options
Germanium (Ge) Meniscus Lenses 25.0 - 50.0mm 25.0 - 100mm 2.0 to 14.0μm Uncoated or 2 AR Options
Silicon (Si) PCX Lenses 25.0mm 25.0 - 250mm 1.20 to 7.0μm Uncoated or 3-5μm AR Coated
Calcium Fluoride (CaF2) PCX Lenses 12.5 - 50.0mm 18.0 - 150mm 0.25 to 7.0μm Uncoated
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TECHSPEC® Infrared Lens Options - Spherical Lenses
TECHSPEC® Infrared Lens Options - Aspherical Lenses
Size Range Focal Length Range Wavelength Range Coating Options
Zinc Selenide (ZnSe) Aspheric Lenses 12.7 - 50.8mm 6.35 - 50.8mm 0.60 to 18.0μm Uncoated or 8-12μm AR Coated
Germanium (Ge) Aspheric Lenses 25.0 - 50.0mm 12.5 - 75.0mm 2.0 to 14.0μm Uncoated or 3 AR Options
Germanium (Ge) Hybrid Aspheric Lenses 25.0mm 12.5 - 100mm 3.0 to 5.0μm 3-5μm AR Coated
Silicon (Si) Aspheric Lenses 25.0mm 12.5 - 50.0mm 1.20 to 7.0μm Uncoated or 3-5μm AR Coated
Small Diameter IR Aspheric Lenses 4.5 - 8.0mm 1.47 - 5.95mm 0.90 to 13.0μm 3 AR Coating Options
Volume Pricing Available
IR Selection Guide
Material
Usable
Transmission
Range (μm)
Index of
Refraction
Abbe
Number
Density
(g/cm3)
CTE
(x 10-6/°C)
dn/dT
(x 10-6/°C)
Knoop
Hardness Properties Typical Applications
Calcium Fluoride
(CaF) 0.25 - 7.0 1.434 95.1 3.18 18.85 -10.6 158.3 Low absorption; high refractive index
homogeneity
2Spectroscopy, Semiconductor
Processing, Cooled Thermal Imaging
Chalcogenide Glass
(IG6) 0.9 - 13.0 2.795 N/A 4.63 20.7 35.5 1.04 Low thermal change in refractive index and
dispersion; excellent moldability
Thermal Imaging, Color Correction
in the 2 - 12μm Spectrum
Germanium
(Ge) 2.0 - 14.0 4.003 N/A 5.33 6.1 396 780 High index of refraction; high Knoop hardness;
excellent MWIR to LWIR Transmission
Thermal Imaging, Rugged IR
Imaging
Magnesium Fluoride
High CTE; low index of refraction; good
(MgF) 0.12 - 7.0 1.413 106.2 3.18 13.7 1.7 415 transmission from visible to MWIR
2Broadband Applications not requiring
Anti-Refl ection Coatings
Barium Fluoride
(BaF2) 0.2 - 12.0 1.475 81.78 4.89 18.1 15.2 82 Broad transmission range; resistant to high
energy radiation FTIR Spectroscopy, Scintillation
Potassium Bromide
(KBr) 0.25 - 26.0 1.527 33.6 2.75 43 -40.8 7 Good resistance to mechanical shock; water
soluble; broad transmission range FTIR Spectroscopy
Sapphire
(Al0) 0.2 - 5.5 1.768 72.2 3.97 5.3 13.1 2200 Excellent durabilty; good MWIR transmission IR Laser Systems, Spectroscopy, and
Rugged Environmental Equipment
23Silicon
(Si) 1.2 - 7.0 3.422 N/A 2.33 2.55 1.6 1150 Low cost; lightweight Spectroscopy, MWIR Laser Systems,
THz Imaging
Sodium Chloride
(NaCl) 0.25 - 16.0 1.491 42.9 2.17 44 -40.8 18.2 Low cost; water soluble; excellent broadband
transmission; sensitive to thermal shock FTIR Spectroscopy
Zinc Selenide
(ZnSe) 0.6 - 18.0 2.403 N/A 5.27 7.1 61 120 Low absorption; high resistance to
thermal shock
CO2Laser Systems and Thermal
Imaging
Zinc Sulfi de
(ZnS) 0.4 - 12.0 2.631 N/A 5.27 7.6 38.7 120 Excellent transmission from visible to LWIR;
harder and more chemically resistant than ZnSe Thermal Imaging
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