45-825 9 mm Dia. N-LAK22/N-SF6 Achromatic Doublet; EFL=20mm NIR II 750-1550nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 9 mm
- EFL
- 20 mm
- R1
- 11.01 mm
- R2
- -11.01 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
45-825 9 mm Dia. N-LAK22/N-SF6 Achromatic Doublet; EFL=20mm NIR II 750-1550nm
The 45-825 is a high-performance Achromatic Doublet lens, designed and manufactured by Edmund Optics. This lens boasts a 9 mm diameter and an effective focal length of 20 mm, specifically tailored for the Near-Infrared II (NIR II) spectrum, spanning 750-1550 nm.
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 front and back surfaces of the lens are coated with Edmund Optics' standard NIR-II anti-reflective coating, ensuring minimal loss of light due to reflection and scattering.
The lens geometry is intricately designed, with a center thickness of 3.5 mm and edge thickness of 4.49 mm. The lens features three radii of curvature: r1 at 11.01 mm, r2 at -11.01 mm, and r3 at -222.6 mm. These parameters contribute to the lens's superior optical performance, minimizing chromatic aberration and distortion.
The 45-825 is a multiplet lens, meaning it is composed of multiple elements. This design enhances the lens's ability to focus light accurately and reduces optical aberrations. The lens is currently in stock and available for purchase on the Edmund Optics website.
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