89-127 5mm Dia. x 20mm 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
- 5 mm
- EFL
- 20 mm
- BFL
- 19.5 mm
- R1
- 20.41 mm
- R2
- -20.41 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
89-127 5mm Dia. x 20mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm
The 89-127 is a double-convex lens, characterized by its circular base shape and spherical geometry. The lens has a diameter of 5mm and a focal length of 20mm, making it a compact yet powerful optical component. The edge thickness measures 1.19mm, while the center thickness is slightly greater at 1.5mm, providing a balanced optical path.
This lens is made from n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low dispersion. The lens is coated with EDM VIS-EXT on both the front and back surfaces, enhancing its transmission capabilities within the visible spectrum (350-700nm). This coating ensures high-quality image reproduction by reducing surface reflections and improving light transmission.
The lens's inner and outer radii are 0mm, indicating a symmetrical design that minimizes optical aberrations. The effective focal length (EFL) is 20mm, and the back focal length (BFL) is 19.5mm, providing a clear and focused image.
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