SLB-20-25NIR1 20.0 mm Dia. x -25.0 mm FL; Coated; Plano-Concave Lens 633-1064nm
- 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-20-25NIR1 20.0 mm Dia. x -25.0 mm FL; Coated; Plano-Concave Lens 633-1064nm
The SLB-20-25NIR1 is a plano-concave lens with a diameter of 20.0 mm and a focal length of -25.0 mm, making it a negatively powered lens. This lens is sourced from OptoSigma, a renowned vendor in the optical industry, and is available for purchase on their website.
The lens is made of n-BK7 Schott, a popular optical glass due to its excellent optical properties and wide transparency range. The base shape of the lens is circular, and it features a spherical geometry. The center thickness of the lens is 2 mm, while the edge thickness is 6.7 mm. The effective focal length (EFL) is -25.0 mm, and the back focal length (BFL) is -26.3 mm.
The lens is coated with Opt IR1 on both the front and back surfaces. This coating is specifically designed for the infrared region, enhancing the lens's performance in the 633-1064nm wavelength range. The inner and outer radii of the lens are 0 mm, indicating a flat surface on both sides.