45-868 9mm Dia. x 18mm FL; VIS-NIR Coated; Double-Convex Lens VIS-NIR 400-1000nm
- 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
45-868 9mm Dia. x 18mm FL; VIS-NIR Coated; Double-Convex Lens VIS-NIR 400-1000nm
The 45-868 is a high-quality double-convex lens, boasting a 9mm diameter and a focal length of 18mm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for immediate purchase, as indicated by its "in stock" status on the vendor's website.
The lens is constructed from Schott's n-BK7 glass, a material well-known for its excellent optical properties, including a high Abbe number and low dispersion. This makes the lens suitable for a wide range of applications, particularly those requiring high image quality and color correction.
The 45-868 lens features a double-convex geometry, with radii of curvature of 18.15mm and -18.15mm for the first and second surfaces, respectively. This geometry results in a back focal length of 17.12mm and an effective focal length of 18mm. The lens has a central thickness of 2.6mm and an edge thickness of 1.47mm, providing robustness and durability.
The lens is coated with a VIS-NIR coating, specifically the EDM VISNIR0SP2002000 coating, on both the front and back surfaces. This coating is designed to enhance the lens's performance in the visible and near-infrared regions of the spectrum, from 400nm to 1000nm. It reduces reflection and increases transmission, thereby improving image contrast and brightness.