89-165 18mm Dia. x 18mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 18 mm
- EFL
- 18 mm
- BFL
- 16.69 mm
- R1
- 27.22 mm
- R2
- -27.22 mm
Material
- Name
- N-SF11
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.7847141030246312
- λ
- 587.6 nm
- B1
- 1.73759695
- C1
- 0.013188707 μm2
- B2
- 0.313747346
- C2
- 0.0623068142 μm2
- B3
- 1.89878101
- C3
- 155.23629 μm2
89-165 18mm Dia. x 18mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm
The 89-165 is a double-convex lens with a diameter of 18mm and a focal length of 18mm, sourced from the reputable optical vendor, Edmund Optics. This lens is designed for use within the visible light spectrum, specifically between 350-700nm, making it suitable for a wide range of optical applications.
The lens is constructed from n-SF11 Schott, a high-index glass with excellent optical properties. It features a front and back coating of EDM VIS-EXT, a broadband anti-reflection coating that enhances transmission and reduces surface reflections across the entire visible spectrum. This coating is particularly beneficial in applications where high transmission and minimal reflection are critical.
The geometry of the lens includes an edge thickness of 1.44mm and a center thickness of 4.5mm. The lens has an effective focal length (EFL) of 18mm, a back focal length (BFL) of 16.69mm, and radii of curvature of 27.22mm for both the front and back surfaces. The lens is spherical in shape, ensuring excellent image quality and minimal aberration.
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