LC2873-C 9 mm Dia. N-SF11 Plano-Concave Lens; EFL=-17.9mm 1050-1700nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 9 mm
- EFL
- -17.9 mm
- R1
- -14 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
LC2873-C 9 mm Dia. N-SF11 Plano-Concave Lens; EFL=-17.9mm 1050-1700nm
The LC2873-C is a Plano-Concave Spherical Lens with a 9 mm diameter, manufactured by Thorlabs. This lens is designed for use in the 1050-1700nm wavelength range, making it suitable for a variety of applications in the near-infrared spectrum.
The lens features an effective focal length (EFL) of -17.9mm, indicating its concave design. The EFL is a measure of the lens's ability to focus light and is a critical parameter in lens selection. A negative EFL, as in this case, indicates a diverging lens.
The lens is made from N-SF11 Schott glass, a popular material for infrared optics due to its high refractive index and low dispersion. This makes the lens particularly suitable for applications requiring high precision and low chromatic aberration.
The lens has a center thickness of 2.5mm and a clear aperture, with no inner or outer radius specified. This suggests that the lens is designed for use with collimated beams.
The lens is coated with Thorlabs's Broadband Anti-Reflection Coating (BBAR), which is designed to reduce surface reflections and increase transmission across a broad spectrum. This coating is applied to both the front and back surfaces of the lens.
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