G313205322 22.4 mm Dia. N-BK7 Double-Concave Lens; EFL=-20mm 450-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Qioptiq Photonics
Properties
- Shape
- Circular
- Diameter
- 22.4 mm
- EFL
- -20 mm
- R1
- -20.83 mm
- R2
- 20.83 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5167817367777034
- λ
- 588 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
G313205322 22.4 mm Dia. N-BK7 Double-Concave Lens; EFL=-20mm 450-700nm
This is a G313205322 Double-Concave Lens, a high-quality optical component sourced from Qioptiq Photonics. The lens has a base shape of a circle and is designed for use in the 450-700nm wavelength range, making it suitable for a wide range of optical applications.
The lens is made from N-BK7, a popular optical glass known for its excellent optical properties. It has a diameter of 22.4mm and a center thickness of 1.5mm. The lens's effective focal length (EFL) is -20mm, indicating its double-concave design. The first radius of curvature (R1) is -20.833mm, and the second radius of curvature (R2) is 20.833mm, both of which contribute to the lens's double-concave shape.
The lens features a broadband anti-reflection coating on both the front and back surfaces. This coating, identified as 'qio bbar arb2visnbk7', is designed to reduce surface reflections and increase transmission in the visible spectrum.