SLB-20-25NM 20.0 mm Dia. x -25.0 mm FL; Coated; Plano-Concave Lens 400-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -25 mm
- BFL
- -26.3 mm
- R1
- -12.98 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-20-25NM 20.0 mm Dia. x -25.0 mm FL; Coated; Plano-Concave Lens 400-700nm
The SLB-20-25NM is a Plano-Concave Spherical Lens, sourced from OptoSigma, designed for use within the wavelength range of 400-700nm. This lens boasts a 20.0 mm diameter and a focal length of -25.0 mm, making it suitable for a variety of optical applications.
The lens is fabricated from n-BK7 Schott, a popular optical glass due to its excellent optical properties, including a high Abbe number and low dispersion. This material is well-suited for use in broadband optical systems, as it helps minimize chromatic aberration.
The lens features a plano-concave geometry, with a center thickness of 2 mm and an edge thickness of 6.7 mm. The inner radius is 0 mm, while the outer radius is also 0 mm. The back focal length (BFL) is -26.3 mm, and the effective focal length (EFL) is -25 mm.
The SLB-20-25NM is equipped with an Opt M coating on both the front and back surfaces. This coating enhances the lens's performance by reducing reflection and increasing transmission, thereby improving overall system efficiency.
This lens is currently in stock and available for immediate purchase through the provided weblink.