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67-631 15mm Dia. x 22.5mm FL; NIR II Coated; Double-Convex Lens NIR II 750-1550nm

67-631 15mm Dia. x 22.5mm FL; NIR II Coated; Double-Convex Lens NIR II 750-1550nm

Type
Lens
Subtype
Spherical Lens (Convex-Convex)
Brand
Edmund Optics
Product webpage
Edmund Optics products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
15 mm
EFL
22.5 mm
BFL
21.29 mm
R1
34.36 mm
R2
-34.36 mm

Material

Name
N-SF11
Dispersion Equation
Sellmeier
n (λ)
1.7847141030246312
λ
587.6 nm
B1
1.73759695
C1
0.013188707 μm2
B2
0.313747346
C2
0.0623068142 μm2
B3
1.89878101
C3
155.23629 μm2

67-631 15mm Dia. x 22.5mm FL; NIR II Coated; Double-Convex Lens NIR II 750-1550nm

The 67-631 is a high-quality double-convex lens, 15mm in diameter and with a focal length of 22.5mm, sourced from the renowned optical vendor, Edmund Optics. This lens is specifically designed for use in the near-infrared (NIR) spectrum, with a coating optimized for the NIR II range of 750-1550nm.

The lens is made from n-SF11 Schott, a high-index glass with excellent transmittance in the NIR region. The double-convex geometry, with radii of curvature of 34.36mm for both the front and rear surfaces, provides a high level of optical power and a compact form factor. The edge thickness is 2.54mm, while the center thickness is 4.2mm, ensuring robustness and durability.

The lens features a standard anti-reflection coating on both the front and back surfaces, specifically the EDM NIR-II STD curve. This coating is designed to minimize surface reflections and increase transmission in the NIR II range, enhancing the performance of the lens in its intended application.

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