49-544 9mm Dia. x -12mm FL; NIR I Coated; Double-Concave Lens 600-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 9 mm
- EFL
- -12 mm
- BFL
- -12.41 mm
- R1
- -19.16 mm
- R2
- 19.16 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
49-544 9mm Dia. x -12mm FL; NIR I Coated; Double-Concave Lens 600-1050nm
The 49-544 is a double-concave lens with a 9mm diameter and a focal length of -12mm, sourced from Edmund Optics. This lens is designed for use in the near-infrared (NIR) spectrum, specifically between 600-1050nm.
The lens is made from n-SF11 Schott, a high-index glass with excellent transmittance in the NIR region. This makes it ideal for applications such as night vision, thermal imaging, and spectral analysis.
The lens features a double-concave geometry, meaning it has two curved surfaces that both curve inward. This design is used to diverge light rays, making it suitable for use as an objective lens in multi-element systems or as a beam expander.
The lens has a center thickness of 1.5mm and an edge thickness of 2.43mm, providing robustness and durability. The inner and outer radii are both 0mm, indicating a symmetrical curvature.
The lens is coated with Edmund Optics' NIR-I standard curve coating on both the front and back surfaces. This coating is designed to enhance the lens's performance in the NIR region, improving transmission and reducing reflection.