SLB-40B-50NM 40.0 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 400-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 40 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-40B-50NM 40.0 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 400-700nm
The SLB-40B-50NM is a high-quality double-concave lens, designed with a base shape of a circle and a diameter of 40.0 mm. This lens is sourced from OptoSigma, a renowned vendor known for its precision optical components. The lens features a significant thickness at the edge, measuring 10 mm, and a minimal thickness at the center, measuring 2 mm.
The effective focal length (EFL) of this lens is -49.7 mm, indicating its double-concave nature. The first radius of curvature (R1) is -51.9 mm, and the second radius of curvature (R2) is 51.9 mm, further emphasizing its concave shape. The back focal length (BFL) is -50.3 mm.
The lens is made of n-BK7 Schott, a popular material in the optical industry due to its excellent optical properties. The wavelength for this lens is 546.1 nm.
The lens is coated with Opt M on both the front and back surfaces, enhancing its performance in the 400-700 nm spectrum. This coating ensures high transmission and low reflection, making it suitable for various applications in this spectral range.
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