SLB-30B-35NIR2 30.0 mm Dia. x -34.7 mm FL; Coated; Double-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 30 mm
- EFL
- -34.7 mm
- BFL
- -35.3 mm
- R1
- -36.33 mm
- R2
- 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-30B-35NIR2 30.0 mm Dia. x -34.7 mm FL; Coated; Double-Concave Lens 750-1550nm
The SLB-30B-35NIR2 is a high-quality double-concave lens, designed and manufactured by OptoSigma. This lens, with a diameter of 30.0 mm, is specifically engineered for use within the wavelength range of 750-1550nm, making it ideal for near-infrared applications.
The lens features a base shape of a circle, with a center thickness of 2mm and an edge thickness of 8.5mm. The effective focal length (EFL) of this lens is -34.7mm, and the back focal length (BFL) is -35.3mm. The first radius of curvature (R1) is -36.33mm, and the second radius of curvature (R2) is 36.33mm. The lens is made from n-BK7 Schott, a popular optical glass known for its excellent optical properties.
The SLB-30B-35NIR2 is coated with Opt IR2, a broadband anti-reflection coating that enhances its performance in the near-infrared region. This coating is applied to both the front and back surfaces of the lens, reducing surface reflections and improving transmission.