SLB-20-40NIR2 20.0 mm Dia. x -40.0 mm FL; Coated; Plano-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -40 mm
- BFL
- -41.3 mm
- R1
- -20.76 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.518720636186463
- λ
- 546.1 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
SLB-20-40NIR2 20.0 mm Dia. x -40.0 mm FL; Coated; Plano-Concave Lens 750-1550nm
The SLB-20-40NIR2 is a Plano-Concave Spherical Lens, sourced from OptoSigma, with a diameter of 20.0 mm and a focal length of -40.0 mm. This lens is designed for use within the wavelength range of 750-1550nm, making it suitable for near-infrared applications.
The lens is fabricated from n-bk7 schott, a popular material in optical systems due to its excellent optical properties and versatility. The lens's geometry includes an inner radius of 0 mm and an outer radius of 0 mm, with a thickness at the edge of 4.6 mm and a center thickness of 2 mm. The effective focal length (EFL) is -40 mm, and the back focal length (BFL) is -41.3 mm.
The SLB-20-40NIR2 features a coating of opt ir2 on both the front and back surfaces. This coating enhances the lens's performance within its specified wavelength range, providing improved transmission and reduced reflection.
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