89-139 9mm Dia. x 27mm 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
- 9 mm
- EFL
- 27 mm
- BFL
- 26.08 mm
- R1
- 27.43 mm
- R2
- -27.43 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
89-139 9mm Dia. x 27mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm
The 89-139 is a high-quality spherical lens, boasting a double-convex design and a base shape of a circle. This lens, sourced from the reputable vendor Edmund Optics, is a versatile optical component with a diameter of 9mm and a focal length of 27mm. The lens's geometry is meticulously crafted, with an edge thickness of 2mm and a center thickness of 2.74mm, ensuring optimal performance.
The lens's effective focal length (EFL) is 27mm, making it suitable for a wide range of applications. The first radius of curvature (R1) is 27.43mm, while the second radius (R2) is -27.43mm, indicating its double-convex nature. The back focal length (BFL) is 26.08mm, providing additional flexibility in its use.
The lens is made from the renowned material N-BK7 Schott, a borosilicate crown glass known for its excellent optical properties. The wavelength for this lens is 587.6nm, which is in the visible light spectrum.
The lens features a VIS-EXT coating on both the front and back, enhancing its performance in the visible light spectrum (350-700nm). This coating ensures high transmission and low reflection, making it an ideal choice for applications that require clear, bright, and undistorted images.