47-380 25 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
- 25 mm
- EFL
- 150 mm
- R1
- 84.66 mm
- R2
- -84.66 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
47-380 25 mm Dia. N-LAK22/N-SF6 Achromatic Doublet; EFL=150mm NIR II 750-1550nm
The 47-380 is a high-quality achromatic doublet lens, boasting a 25 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 directly from their website.
The lens is constructed from two types of Schott glass, N-LAK22 and N-SF6, which have been carefully selected and arranged to minimize chromatic aberration, a common issue in optical systems. The geometry of the lens is meticulously designed, with an inner radius of 0mm, an outer radius of 0mm, and a center thickness of 6mm. The edge thickness is 9mm, and the lens features a rear radius of curvature of -84.66mm and a front radius of curvature of 84.66mm. The lens also has an additional thickness 'a' of 4mm at the center.
The 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 enhance transmission and reduce reflection, thereby improving the overall efficiency and quality of the optical system.
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