67-669 40mm Dia. x 100mm 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
- 40 mm
- EFL
- 100 mm
- BFL
- 97.34 mm
- R1
- 103.21 mm
- R2
- -103.21 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
67-669 40mm Dia. x 100mm FL; NIR II Coated; DCX N-K5 Lens NIR II 750-1550nm
The 67-669 is a high-quality spherical lens, boasting a 40mm diameter and a focal length of 100mm, sourced from the renowned optical vendor, Edmund Optics. This lens is specifically designed for use in the near-infrared (NIR) spectrum, with a coating optimized for the NIR II range of 750-1550nm.
The lens is constructed from N-K5 Schott glass, a material known for its excellent optical properties in the NIR range. The geometry of the lens is circular, with a thickness of 4.09mm at the edge and 8mm at the center. The effective focal length (EFL) is 100mm, and the back focal length (BFL) is 97.34mm. The first and second radii of curvature are 103.21mm and -103.21mm, respectively.
The lens features a standard curve coating on both the front and back surfaces, specifically the EDM NIR-II STD curve. This coating is designed to enhance the lens' performance in the NIR II range, ensuring optimal transmission and minimal reflection.