SLB-40-70NIR2 40.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- -70 mm
- BFL
- -71.3 mm
- R1
- -36.33 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-40-70NIR2 40.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 750-1550nm
The SLB-40-70NIR2 is a Plano-Concave Spherical Lens, 40.0 mm in diameter and featuring a focal length of -70.0 mm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry. The lens is designed for use within the wavelength range of 750-1550nm, making it suitable for near-infrared applications.
The lens is constructed from n-BK7 Schott, a popular material in the optical industry due to its excellent optical properties and versatility. The lens's geometry includes an edge thickness of 8mm and a center thickness of 2mm, providing a robust structure while minimizing unnecessary weight.
The SLB-40-70NIR2 is coated with Opt IR2 on both the front and back surfaces. This coating enhances the lens's performance within its specified wavelength range, improving transmission and reducing reflection. The coating also provides protection against environmental factors, ensuring the lens maintains its performance over time.