67-657 25mm Dia. x 200mm FL; NIR II Coated; DCX N-K5 Lens NIR II 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 200 mm
- BFL
- 198.35 mm
- R1
- 208.34 mm
- R2
- -208.34 mm
Material
- Name
- N-K5
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5224870269234316
- λ
- 587.6 nm
- B1
- 1.08511833
- C1
- 0.00661099503 μm2
- B2
- 0.199562005
- C2
- 0.024110866 μm2
- B3
- 0.930511663
- C3
- 111.982777 μm2
67-657 25mm Dia. x 200mm FL; NIR II Coated; DCX N-K5 Lens NIR II 750-1550nm
The 67-657 is a high-performance spherical lens, boasting a 25mm diameter and a focal length of 200mm, sourced from the renowned optical vendor, Edmund Optics. This lens is specifically designed for use in the near-infrared (NIR) spectrum, with a wavelength of 587.6nm, and is coated with the EDM NIR-II standard curve on both the front and back surfaces.
The lens is constructed from the high-quality material N-K5, a type of glass manufactured by Schott, ensuring durability and excellent optical performance. The geometry of the lens is meticulously designed, with an edge thickness of 4.25mm and a center thickness of 5mm. The effective focal length (EFL) is 200mm, and the back focal length (BFL) is 198.35mm, providing a long focal length for various applications.
The lens features a convex-convex base shape and a circular geometry, making it suitable for a wide range of optical systems. The inner and outer radii are 0mm, indicating a simple and efficient design. The coating on the lens is specifically tailored for NIR applications, providing superior transmission and minimal reflection in the 750-1550nm range.
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