SLB-20B-40N 20.0 mm Dia. x -39.7 mm FL; Double-Concave Lens Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -39.7 mm
- BFL
- -40.3 mm
- R1
- -41.52 mm
- R2
- 41.52 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-40N 20.0 mm Dia. x -39.7 mm FL; Double-Concave Lens Uncoated
The SLB-20B-40N is a high-quality double-concave lens offered by OptoSigma, a leading vendor in the optical industry. This lens, designed with a base shape of a circle, is fabricated from the renowned material n-BK7 Schott, ensuring durability and reliability.
The lens boasts a diameter of 20.0 mm and a central thickness of 2.0 mm, with an edge thickness of 4.4 mm. The double-concave design is characterized by its radii of curvature, R1 and R2, which are -41.52 mm and 41.52 mm respectively. This design results in a back focal length (BFL) of -40.3 mm and an effective focal length (EFL) of -39.7 mm.
The lens is uncoated, offering users the flexibility to apply their preferred coating based on their specific application requirements. This lens is designed to operate at a wavelength of 546.1 nm.
The SLB-20B-40N is currently in stock and available for immediate purchase. For more detailed information, please refer to the vendor's website using the provided weblink.
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