49-550 25mm Dia. x -25mm FL; NIR I Coated; Double-Concave Lens 600-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- -25 mm
- BFL
- -25.69 mm
- R1
- -39.78 mm
- R2
- 39.78 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
49-550 25mm Dia. x -25mm FL; NIR I Coated; Double-Concave Lens 600-1050nm
The 49-550 is a double-concave lens with a diameter of 25mm and a focal length of -25mm, making it a negatively powered lens. This lens is sourced from Edmund Optics, a reputable vendor known for their high-quality optical components. The lens is designed for use within the near-infrared (NIR) spectrum, specifically between 600-1050nm, making it suitable for a variety of NIR applications.
The lens is made from n-SF11 Schott, a high-index glass that offers excellent optical performance. The lens features a standard curve coating on both the front and back surfaces, specifically the EDM NIR-I coating. This coating is designed to enhance the lens' performance in the NIR spectrum, providing improved transmission and reduced reflection.
The lens has a center thickness of 2.5mm and an edge thickness of 6.05mm, providing a robust and durable design. The inner and outer radii are 0mm, indicating a symmetrical design. The effective focal length (EFL) is -25mm, and the back focal length (BFL) is -25.69mm.
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