32-968 9mm Dia. x 18mm FL Uncoated; Double-Convex Lens
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 9 mm
- EFL
- 18 mm
- BFL
- 17.12 mm
- R1
- 18.15 mm
- R2
- -18.15 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
32-968 9mm Dia. x 18mm FL Uncoated; Double-Convex Lens
The 32-968 is a 9mm diameter, double-convex spherical lens with a focal length of 18mm, sourced from Edmund Optics. This lens is made from the high-quality material n-BK7 Schott, a borosilicate crown glass known for its excellent optical properties, including low dispersion and high transmission in the visible spectrum.
The lens features a double-convex design, characterized by two spherical surfaces that curve outwards, away from the optical axis. This design is particularly useful for imaging applications, as it provides a wide field of view and low spherical aberration. The lens has an inner radius of 0mm and an outer radius of 0mm, indicating a symmetrical design.
The geometry of the lens includes a thickness of 1.47mm at the edge and 2.6mm at the center. The effective focal length (EFL) is 18mm, and the back focal length (BFL) is 17.12mm. The radii of curvature for the first and second surfaces are 18.15mm and -18.15mm, respectively.
The lens is uncoated, meaning it does not have any anti-reflective coatings. While this can lead to some reflection loss, it also means the lens is more cost-effective and suitable for applications where such coatings are not necessary.
Please note that the lens is designed for a wavelength of 587.6nm, which is in the green part of the visible spectrum. This wavelength corresponds to the sodium D line, often used as a reference in optical systems.