SLB-20-70NM 20.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 400-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -70 mm
- BFL
- -71.3 mm
- R1
- -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-20-70NM 20.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 400-700nm
The SLB-20-70NM is a Plano-Concave Spherical Lens, sourced from OptoSigma, with a diameter of 20.0 mm and a focal length of -70.0 mm. This lens is designed for use within the wavelength range of 400-700nm, making it suitable for a wide range of optical applications.
The lens is made from n-bk7 schott, a popular material in the optical industry due to its excellent optical properties. The lens's geometry includes an inner radius of 0 and an outer radius of 0, with a thickness at the edge of 3.4 and a thickness at the center of 2.0. The back focal length (bfl) is -71.3, and the effective focal length (efl) is -70.0.
The SLB-20-70NM is coated with Opt M on both the front and back surfaces, enhancing its performance in specific wavelength ranges. This coating helps to reduce reflection and increase transmission, improving the overall efficiency of the optical system.
This lens is currently in stock and available for immediate purchase. For more information, please refer to the vendor's website using the provided weblink.