68-011 12mm Dia. x -12mm FL; NIR II Coated; Double-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12 mm
- EFL
- -12 mm
- BFL
- -12.81 mm
- R1
- -19.47 mm
- R2
- 19.47 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
68-011 12mm Dia. x -12mm FL; NIR II Coated; Double-Concave Lens 750-1550nm
The 68-011 is a double-concave lens with a diameter of 12mm and a focal length of -12mm, making it a negatively powered lens. This lens is sourced from Edmund Optics, a reputable vendor known for its high-quality optical elements. The lens is designed for use in the near-infrared (NIR) spectrum, specifically between 750nm and 1550nm, making it suitable for various applications in this range.
The lens is made from n-SF11 Schott, a high-index glass with excellent optical properties. This material is known for its low auto-fluorescence, making it ideal for applications that require low background noise. The lens features a standard NIR-II coating on both the front and back surfaces, which is designed to enhance transmission in the NIR spectrum. This coating is part of Edmund Optics' standard curve, ensuring consistent performance across different lenses.
The lens has a center thickness of 3mm and an edge thickness of 4.71mm, providing a robust and durable design. The inner and outer radii are 0mm, indicating a symmetrical design. The lens's base shape is circular, making it compatible with a wide range of optical systems.