68-010 9mm Dia. x -18mm FL; NIR II Coated; Double-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 9 mm
- EFL
- -18 mm
- BFL
- -18.49 mm
- R1
- -18.86 mm
- R2
- 18.86 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
68-010 9mm Dia. x -18mm FL; NIR II Coated; Double-Concave Lens 750-1550nm
The 68-010 is a high-quality double-concave lens, 9mm in diameter and featuring a focal length of -18mm. This lens is sourced from Edmund Optics, a renowned vendor known for their extensive catalog of optical elements.
The lens is made from N-BK7 Schott, a popular optical glass due to its excellent optical properties and versatility. It has a refractive index of 1.5168 at 587.6nm, making it suitable for a wide range of applications.
The 68-010 is coated with EDM NIR-II std curve on both the front and back surfaces. This coating enhances the lens' performance in the near-infrared (NIR) region, specifically between 750nm and 1550nm. This makes it an ideal choice for applications that require high transmission in the NIR spectrum, such as night vision, thermal imaging, and scientific research.
The lens geometry includes an edge thickness of 2.45mm and a center thickness of 1.5mm. The inner and outer radii are both 0mm, indicating a purely spherical lens. The base shape is circular, adding to its versatility in various applications.