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Infrared Lenses

Product catalog summary

Infrared Lenses Overview
Sapphire, Calcium Fluoride (CaF2), and AMTIR-1 are the primary materials discussed for infrared lenses. Each material has unique properties suitable for different applications ranging from UV to NIR and Mid-IR.

Specifications

Sapphire Lenses: Known for their hardness and durability, these lenses have a wavelength range of 150–5000 nm and a focal length tolerance of ±2%. They feature a clear aperture of 95% of the central diameter and a surface quality of 60-40 scratch-dig.
Calcium Fluoride Lenses: These lenses offer high transmittance and low chromatic aberration, with a wavelength range of 150–8000 nm. They have a surface accuracy of 1 λ at 633 nm and a surface quality of 60-40 scratch-dig.
AMTIR-1 Lenses: Cost-effective for NIR to Mid-IR applications, these lenses cover a wavelength range of 800–16000 nm. They have a surface quality of 80-50 scratch-dig and an index of refraction that varies with wavelength.

Transmission Characteristics
The document includes a graph showing the transmission percentages of Sapphire, CaF2, and AMTIR-1 across different wavelengths, highlighting their effectiveness in various IR applications.

Ordering Information
The document provides detailed specifications for different models of lenses, including diameter, effective focal length (EFL), back focal length (BFL), center thickness (Tc), edge thickness (Te), and radius (R).

Material Properties

Sapphire: Hardness of 1370 kg m^-2, Young's modulus of 3.4 x 10¹¹ N m^-2, and a melting point of 2053°C.
Calcium Fluoride: Hardness of 158.3 kg mm^-2, Young's modulus of 7.6 x 10¹⁰ N m^-2.

Contact Information
For further inquiries, contact [email protected] or visit newport.com.

Catalog excerpts

O p t i c s 469 TECHNICAL REFERENCE AND FUNDAMENTAL APPLICATIONS LENS SELECTION GUIDE SPHERICAL LENSES CYLINDRICAL AND SPECIALTY LENSES OPTICS SETS OPTICAL SYSTEMS MIRRORS PRISMS Infrared Lenses • Sapphire: Extremely hard and durable, UV to NIR • CaF2: High average transmittance, low chromatic aberration, UV to NIR • AMTIR-1: Low cost material, NIR to Mid-IR • Plano-convex, 1" diameter, uncoated Specifications Sapphire Lenses Focal Length Tolerance ±2 % Material Sapphire Wavelength 150–5000 nm, uncoated Clear Aperture 95% of central diameter Surface Quality 60-40 scratch-dig Centration, Spherical Lenses 3 arc min Diameter Tolerance +0/-0.25 mm Center Thickness (Tc) Tolerance ±0.25 mm Edge Thickness (Te) 1.5 Edge Finish Fine ground, beveled Hardness (Knoop) 1370 kg m-2 Young's modulus 3.4 x 1011 N m-2 Melting point 2053° C Thermal Limit 22 W m-1 K-1 Calcium Fluoride Lenses AMTIR-1 Lenses WAVELENGTH (ìm) TRANSMISSION (%) 0 10 20 30 40 50 60 70 80 90 100 0.0 0.15 0.2 0.3 0.4 0.5 1.0 2 5 10 20 CaF CALCIUM FLUORIDE (3 mm) 2 AMTIR-1 (10 mm) SAPPHIRE (3 mm) Transmission of IR optical materials Ordering Information Model Material Diameter (mm) EFL (mm) f/# BFL (mm) Tc (mm) Te (mm) R (mm) SAPX010 Sapphire 25.4 25.4 1 21.9 6.2 1.5 19.51 SAPX013 Sapphire 25.4 50 2 47.2 3.6 1.5 38.41 SAPX016 Sapphire 25.4 100 3.9 98.6 2.5 1.5 76.82 CAPX010 CaF2 25.4 50 2 45.27 6.4 2 20 CAPX013 CaF2 25.4 100 3.9 96.92 4.1 2 39.99 CAPX016 CaF2 25.4 500 19.6 498.2 2.4 2 199.99 AMPX010 AMTIR-1 25.4 26.06 1 24.59 3.68 1.6 39.37 AMPX013 AMTIR-1 25.4 38.6 1.5 37.29 3.3 1.9 58.34 Material AMTIR-1 Wavelength 800–16000 nm, uncoated Clear Aperture >90 Surface Quality 80-50 scratch-dig Centration, Spherical Lenses 3 arc min Diameter Tolerance +0/-0.25 mm Center Thickness (Tc) Tolerance ±0.25 mm Edge Finish Fine ground, beveled Index of refraction At 1.0 ìm 2.6055 At 2.0 ìm 2.5310 At 5.0 ìm 2.5112 At 10.0 ìm 2.4977 At 14.0 ìm 2.4825 Focal Length Tolerance ±1 % Material CaF2 Wavelength 150–8000 nm, uncoated Surface Accuracy 1 ë at 633 nm Clear Aperture central 90% of diameter Surface Quality 60-40 scratch-dig Centration, Spherical Lenses 3 arc min Diameter Tolerance +0/-0.13 mm Center Thickness (Tc) Tolerance ±0.25 mm Edge Thickness (Te) 2.0 Edge Finish Fine ground, beveled Hardness (Knoop) 158.3 kg mm-2 Young's modulus 7.6 x 1010 N m-2 Index of refraction At 200 nm 1.50 At 500 nm 1.43 At 5.0 ìm 1.40 Email: [email protected] • Web: newport.com

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