SLB-20B-50NIR2 20.0 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -49.7 mm
- BFL
- -50.3 mm
- R1
- -51.9 mm
- R2
- 51.9 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-20B-50NIR2 20.0 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 750-1550nm
The SLB-20B-50NIR2 is a high-quality double-concave lens, designed and manufactured by OptoSigma. This lens, with a base shape of a circle, is specifically engineered for use within the wavelength range of 750-1550nm, making it suitable for near-infrared applications.
The lens boasts a diameter of 20.0 mm and a center thickness of 2.0 mm, with an edge thickness of 3.9 mm. The effective focal length (EFL) is -49.7 mm, and the back focal length (BFL) is -50.3 mm. The radii of curvature for the first and second surfaces are -51.9 mm and 51.9 mm, respectively.
The lens is crafted from n-BK7 Schott, a popular optical glass due to its excellent optical properties and versatility. The lens surfaces are coated with Opt IR2, a coating that enhances its performance within the specified wavelength range.
This lens is currently in stock and available for immediate purchase. For more information, please refer to the vendor's website using the provided weblink.
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