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
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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