89-177 25mm Dia. x 35mm 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
- 25 mm
- EFL
- 35 mm
- BFL
- 32.81 mm
- R1
- 35.09 mm
- R2
- -35.09 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
89-177 25mm Dia. x 35mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm
The 89-177 is a high-quality double-convex lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a base shape of a circle, has a diameter of 25mm and a focal length of 35mm, making it suitable for a wide range of optical applications.
The lens is made from n-BK7 Schott, a popular optical glass known for its excellent transparency and low auto-fluorescence. The geometry of the lens includes an edge thickness of 2mm and a center thickness of 6.6mm, contributing to its robust construction. The effective focal length (EFL) is 35mm, and the radii of curvature are 35.09mm for the first surface and -35.09mm for the second surface. The back focal length (BFL) is 32.81mm.
The lens features a VIS-EXT coating on both the front and back surfaces, designed to enhance its performance in the visible spectrum, specifically between 350-700nm. This coating reduces surface reflections, improving transmission and overall image quality.