68-007 6mm 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
- 6 mm
- EFL
- -12 mm
- BFL
- -12.33 mm
- R1
- -12.57 mm
- R2
- 12.57 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5167984379050088
- λ
- 587.6 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
68-007 6mm Dia. x -12mm FL; NIR II Coated; Double-Concave Lens 750-1550nm
The 68-007 is a double-concave lens with a 6mm diameter 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 made from N-BK7 Schott glass, a popular material for its excellent optical properties and versatility.
The lens features a double-concave geometry, meaning it has two concave surfaces. This design is often used to spread out or diverge light rays, making it suitable for applications such as beam expansion or collimation. The lens has an inner radius of 0mm and an outer radius of 0mm, indicating a symmetrical design.
The 68-007 is coated with Edmund Optics' NIR-II standard curve coating on both the front and back surfaces. This coating is designed to enhance the lens' performance in the near-infrared (NIR) region, specifically between 750nm and 1550nm. This makes the lens ideal for applications such as NIR spectroscopy, thermal imaging, and night vision.
The lens has a thickness of 1.59mm at the edge and 1mm at the center, providing a robust and compact design. The effective focal length (EFL) is -12.33mm, and the radius of curvature for the first and second surfaces are -12.57mm and 12.57mm, respectively.