38-408 12.5mm Dia. x 100.0mm FL; NIR II Coated; Plano-Convex Lens NIR II 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12.5 mm
- EFL
- 75 mm
- BFL
- 73.88 mm
- R1
- 38.76 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
38-408 12.5mm Dia. x 100.0mm FL; NIR II Coated; Plano-Convex Lens NIR II 750-1550nm
The 38-408 is a Plano-Convex lens with a diameter of 12.5mm and a focal length of 100.0mm, specifically designed for use in the Near-Infrared II (NIR II) spectrum, which covers the wavelength range of 750-1550nm. This lens is sourced from the reputable optical vendor, Edmund Optics.
The lens is made of N-BK7 Schott glass, a popular material for optical elements due to its excellent optical properties and versatility. The Plano-Convex geometry, where one side is flat and the other is curved, is a common design for lenses, providing a simple yet effective way to focus light.
The 38-408 lens features a front and back coating of EDM NIR-II STD Curve, which is specifically designed for use in the NIR II spectrum. This coating enhances the lens' performance by reducing surface reflections and increasing transmission in the NIR II range.
The lens has a center thickness of 1.7mm and an edge thickness of 1.19mm, providing a balance between durability and optical performance. The effective focal length (EFL) is 75mm, and the radius of curvature (R1) is 38.76mm. The back focal length (BFL) is 73.88mm, and the lens has no inner or outer radius, indicating a simple, straightforward design.