45-796 12 mm Dia. N-LAK22/N-SF6 Achromatic Doublet; EFL=40mm NIR II 750-1550nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12 mm
- EFL
- 40 mm
- R1
- 22.81 mm
- R2
- -21.91 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
45-796 12 mm Dia. N-LAK22/N-SF6 Achromatic Doublet; EFL=40mm NIR II 750-1550nm
The 45-796 is a high-quality achromatic doublet lens, boasting a 12 mm diameter and an effective focal length of 40 mm, specifically designed for use within the near-infrared (NIR II) spectrum of 750-1550 nm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available directly from their website.
This lens is a multiplet, meaning it is composed of multiple individual lenses to optimize its optical performance. The doublet configuration consists of two lenses made from Schott's N-LAK22 and N-SF6 materials, which are renowned for their excellent optical properties within the NIR II range.
The lens features a geometric design optimized for its purpose, with an edge thickness of 6.12 mm and a center thickness of 4.5 mm. The curvature of the lens is defined by radii of 22.81 mm and -21.91 mm for the first and second surfaces, respectively, and a third radius of -250.49 mm on the inner surface of the second lens.
The 45-796 lens comes with standard NIR II coatings on both the front and back surfaces, specifically Edmund Optics' EDM NIR-II STD CURVE coating. This coating enhances the lens's performance within the NIR II spectrum, ensuring optimal transmission and minimal reflection.
