49-386 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=400mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- 400 mm
- R1
- 257.16 mm
- R2
- -169.03 mm
Material 1
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5185223876207927
- λ
- 550 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
Material 2
- Name
- N-SF5
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6771143911586193
- λ
- 550 nm
- B1
- 1.52481889
- C1
- 0.011254756 μm2
- B2
- 0.187085527
- C2
- 0.0588995392 μm2
- B3
- 1.42729015
- C3
- 129.141675 μm2
49-386 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=400mm VIS-NIR 400-1000nm
The 49-386 is a high-quality achromatic doublet lens, designed and manufactured by Edmund Optics. This lens, with a diameter of 40 mm, is specifically engineered for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning from 400 to 1000 nm. The lens is part of Edmund Optics' extensive catalog, and it is currently in stock, as indicated by its weblink status.
The lens features a focal length (EFL) of 400 mm, making it suitable for applications that require a long focal length. The geometry of the lens includes an edge thickness of 11.3 mm, an inner radius of 0, and an outer radius of 0. The first radius of curvature (r1) is 257.16 mm, while the second radius (r2) is -169.03 mm, and the third radius (r3) is -473.08 mm. The center thickness of the lens is 8.5 mm, with an additional 4 mm of material (thickness center a).
The lens is composed of two types of glass: N-BK7 from Schott and N-SF5 from Schott. These materials were chosen for their excellent optical properties, particularly their low dispersion, which helps to minimize chromatic aberration. The lens is coated with Edmund Optics' VIS-NIR coating (edm visnir0sp2002000) on both the front and back surfaces, further enhancing its performance in the VIS-NIR spectrum.
