68-004 50mm Dia. x -125 FL; NIR II Coated; Plano-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 50 mm
- EFL
- -125 mm
- BFL
- -128.3 mm
- R1
- -64.6 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
68-004 50mm Dia. x -125 FL; NIR II Coated; Plano-Concave Lens 750-1550nm
The 68-004 is a Plano-Concave Lens with a 50mm diameter and a focal length of -125mm, making it ideal for applications that require a negative focal length. This lens is sourced from Edmund Optics, a reputable vendor known for their high-quality optical components.
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 68-004 features a front and back coating of EDM NIR-II STD Curve, a specialized coating designed for use in the Near-Infrared (NIR) spectrum, specifically between 750-1550nm. This coating enhances the lens's performance in the NIR spectrum, making it ideal for applications such as night vision, thermal imaging, and spectroscopy.
The lens has a thickness of 9.87mm at the edge and 5mm at the center, providing a robust and durable design. The inner and outer radii are 0mm, indicating a flat surface on both sides of the lens.
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