67-654 25mm Dia. x 125mm 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
- 25 mm
- EFL
- 125 mm
- BFL
- 123.84 mm
- R1
- 128.65 mm
- R2
- -128.65 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5167984379050088
- λ
- 587.6 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
67-654 25mm Dia. x 125mm FL; NIR II Coated; Double-Convex Lens NIR II 750-1550nm
This is a 25mm diameter, 125mm focal length double-convex lens, specifically designed for use in the near-infrared (NIR) spectrum. The lens is sourced from Edmund Optics and is currently in stock.
The lens is made from n-BK7 Schott, a popular optical glass due to its excellent optical properties and high Abbe number. The double-convex shape, with radii of curvature of 128.65mm and -128.65mm, provides a high degree of focusing power. The lens has an effective focal length (EFL) of 125mm and a back focal length (BFL) of 123.84mm.
The lens features a standard NIR-II coating on both the front and back surfaces. This coating, designated as 'edm nir-ii std curve', is specifically designed to optimize performance in the NIR II range, which spans from 750nm to 1550nm. This coating enhances the lens's transmission capabilities, reduces surface reflections, and increases overall system efficiency.
The lens has a thickness of 2.28mm at the edge and 3.5mm at the center. The inner and outer radii are not specified, indicating that the lens is uniformly curved from edge to edge.