47-318 50 mm Dia. N-LAK22/N-SF6 Achromatic Doublet; EFL=150mm NIR II 750-1550nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 50 mm
- EFL
- 150 mm
- R1
- 86.84 mm
- R2
- -86.84 mm
Material 1
- Name
- N-LAK22
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6536179449828925
- λ
- 550 nm
- B1
- 1.14229781
- C1
- 0.00585778594 μm2
- B2
- 0.535138441
- C2
- 0.0198546147 μm2
- B3
- 1.04088385
- C3
- 100.834017 μm2
Material 2
- Name
- N-SF6
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.811866267147773
- λ
- 550 nm
- B1
- 1.77931763
- C1
- 0.0133714182 μm2
- B2
- 0.338149866
- C2
- 0.0617533621 μm2
- B3
- 2.08734474
- C3
- 174.01759 μm2
47-318 50 mm Dia. N-LAK22/N-SF6 Achromatic Doublet; EFL=150mm NIR II 750-1550nm
The 47-318 is a high-quality achromatic doublet lens, boasting a 50 mm diameter and an effective focal length of 150mm, specifically designed for use in the near-infrared spectrum (NIR II) range of 750-1550nm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available for purchase through their website.
The lens is constructed from two types of Schott glass, N-LAK22 and N-SF6, which are renowned for their excellent optical properties in the NIR II range. The lens features a sophisticated geometry, with an inner radius of 0mm, an outer radius of 0mm, and a center thickness of 11mm. The edge thickness measures 12.47mm, while the center 'a' thickness is 5.5mm. The lens's curvature is defined by radii of 86.84mm and -86.84mm, followed by a significantly larger radius of -894.7mm.
The 47-318 lens is coated with Edmund Optics' standard NIR-II coating on both the front and back surfaces, ensuring optimal performance in the NIR II spectrum. This coating is designed to provide superior transmission and minimal reflection, making it ideal for a wide range of applications, including biomedical imaging, spectroscopy, and night vision technology.
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