SLB-20B-30NIR1 20.0 mm Dia. x -29.7 mm FL; Coated; Double-Concave Lens 633-1064nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -29.7 mm
- BFL
- -30.3 mm
- R1
- -31.14 mm
- R2
- 31.14 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-30NIR1 20.0 mm Dia. x -29.7 mm FL; Coated; Double-Concave Lens 633-1064nm
The SLB-20B-30NIR1 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 633-1064nm, making it suitable for a variety of applications in the near-infrared spectrum.
The lens boasts a diameter of 20.0mm, with a thickness at the edge of 5.3mm and a center thickness of 2.0mm. The effective focal length (EFL) is -29.7mm, indicating its double-concave nature. The first radius of curvature (R1) is -31.14mm, while the second radius (R2) is 31.14mm, further emphasizing its concave-concave geometry. The back focal length (BFL) is -30.3mm.
The lens is crafted from n-BK7 Schott, a popular material in optical systems due to its excellent optical properties. The lens is coated with Opt IR1 on both the front and back surfaces, enhancing its performance within the specified wavelength range.
