67-991 12mm Dia. x -12 FL; NIR II Coated; Plano-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12 mm
- EFL
- -12 mm
- BFL
- -13.23 mm
- R1
- -9.42 mm
Material
- Name
- N-SF11
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.7847141030246312
- λ
- 587.6 nm
- B1
- 1.73759695
- C1
- 0.013188707 μm2
- B2
- 0.313747346
- C2
- 0.0623068142 μm2
- B3
- 1.89878101
- C3
- 155.23629 μm2
67-991 12mm Dia. x -12 FL; NIR II Coated; Plano-Concave Lens 750-1550nm
The 67-991 is a Plano-Concave Lens with a 12mm diameter and a focal length of -12mm, sourced from Edmund Optics. This lens is designed for use in the near-infrared (NIR) spectrum, specifically between 750nm and 1550nm, making it suitable for a wide range of applications in this spectral region.
The lens is made from n-sf11 Schott glass, a material known for its excellent optical properties in the NIR spectrum. The plano-concave geometry of the lens, with a central thickness of 2.2mm and an edge thickness of 3.97mm, contributes to its high performance in NIR applications.
The lens features a standard NIR-II coating on both the front and back surfaces. This coating is designed to enhance the lens's performance in the NIR spectrum, reducing reflections and increasing transmission. The coating is part of Edmund Optics' standard curve, ensuring consistent performance across different lenses.
