SLB-25B-70N 25.0 mm Dia. x -69.7 mm FL; Double-Concave Lens Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- -69.7 mm
- BFL
- -70.3 mm
- R1
- -72.66 mm
- R2
- 72.66 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-25B-70N 25.0 mm Dia. x -69.7 mm FL; Double-Concave Lens Uncoated
The SLB-25B-70N 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 constructed from the renowned material n-BK7 Schott, ensuring durability and reliability.
The lens boasts a diameter of 25.0 mm and a thickness edge of 4.2 mm, with a center thickness of 2 mm. The effective focal length (EFL) is -69.7 mm, indicating its concave nature. The first radius of curvature (R1) is -72.66 mm, while the second radius (R2) is 72.66 mm, further emphasizing its double-concave structure.
The back focal length (BFL) of this lens is -70.3 mm, and it does not have any inner or outer radius, which is typical for a lens of this type. The wavelength for this lens is 546.1 nm, and it is uncoated, offering users the flexibility to apply their preferred coating based on their specific application requirements.
This lens is currently in stock and can be purchased directly from the vendor's website. Its versatility and robust construction make it an excellent choice for various optical applications.
