68-014 20mm Dia. x -20mm FL; NIR II Coated; Double-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -20 mm
- BFL
- -20.55 mm
- R1
- -31.82 mm
- R2
- 31.82 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
68-014 20mm Dia. x -20mm FL; NIR II Coated; Double-Concave Lens 750-1550nm
The 68-014 is a double-concave lens with a diameter of 20mm and a focal length of -20mm, making it a powerful tool for applications that require a highly curved optical path. This lens is sourced from Edmund Optics, a renowned vendor known for their high-quality optical components.
The lens is made from n-SF11 Schott, a high-index glass with excellent transmittance in the near-infrared (NIR) region. This makes the lens particularly suitable for applications in the NIR spectrum, such as night vision, thermal imaging, and spectral analysis.
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 region, reducing reflection and increasing transmission. The coating curve is not specified, but it is standard for NIR-II applications, ensuring reliable and consistent performance.
The lens has a center thickness of 2mm and an edge thickness of 5.03mm, providing a robust and durable structure. The inner and outer radii are not specified, indicating that they are not a critical factor in the lens's performance.