89-202 50mm Dia. x 150mm 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
- 50 mm
- EFL
- 150 mm
- BFL
- 147 mm
- R1
- 153.49 mm
- R2
- -153.49 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
89-202 50mm Dia. x 150mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm
The 89-202 is a high-quality double-convex lens, sourced from the renowned optical vendor, Edmund Optics. This lens boasts a substantial 50mm diameter and a focal length of 150mm, making it a versatile choice for a wide range of optical applications.
The lens is crafted 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 particularly suitable for applications that require high image quality and color correction.
The 89-202 features a VIS-EXT coating on both the front and back surfaces. This coating, specifically designed for the visible spectrum (350-700nm), enhances the lens's light transmission capabilities and reduces surface reflections. The result is improved image brightness and contrast, as well as increased resistance to environmental factors such as dust and moisture.
In terms of geometry, the lens has a center thickness of 9mm and an edge thickness of 4.9mm. The front and back radii of curvature are 153.49mm and -153.49mm respectively, contributing to the lens's double-convex shape. The back focal length is 147mm, and the lens has no inner or outer radius, indicating a uniform thickness.
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