67-538 20.0mm Dia. x 70.0mm FL; NIR II Coated; Plano-Convex Lens NIR II 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- 40 mm
- BFL
- 36.77 mm
- R1
- 20.67 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5167984379050088
- λ
- 587.6 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
67-538 20.0mm Dia. x 70.0mm FL; NIR II Coated; Plano-Convex Lens NIR II 750-1550nm
This is a 20.0mm diameter, plano-convex lens with a focal length of 70.0mm, specifically designed for use in the near-infrared (NIR) spectrum. The lens is sourced from Edmund Optics, a leading provider of optical components.
The lens is made from N-BK7 Schott glass, a popular material for optical elements due to its excellent optical properties and high transparency in the visible and near-infrared regions. The lens features a spherical shape, with a radius of curvature of 20.67mm on the convex side. The center thickness of the lens is 4.9mm, while the edge thickness is 2.32mm.
The lens is coated with Edmund Optics' standard NIR-II coating on both the front and back surfaces. This coating is designed to enhance the lens' performance in the NIR region, specifically between 750nm and 1550nm. The coating provides improved transmission and reduces reflection, thereby enhancing the overall efficiency and quality of the optical system in which the lens is used.
The lens has an effective focal length (EFL) of 40mm, and a back focal length (BFL) of 36.77mm. The lens is designed to be used in air, with an assumed refractive index of 1.000293.