47-698 6.25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=60mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 6.25 mm
- EFL
- 60 mm
- R1
- 37.16 mm
- R2
- -26.28 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
47-698 6.25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=60mm VIS 0° 425-675nm
The 47-698 is a high-quality achromatic doublet lens, boasting a 6.25 mm diameter and an effective focal length (EFL) of 60mm, specifically designed for the visible light spectrum ranging from 425 to 675nm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for immediate use.
The lens is constructed from two types of glass: N-BK7 and N-SF5, both from Schott. This combination ensures superior optical performance, minimizing chromatic aberration and delivering sharp, clear images. The lens features a standard anti-reflection coating, denoted as 'edm vis-0 std curve', on both the front and back surfaces, further enhancing its light transmission capabilities.
The lens geometry is meticulously designed, with an inner radius of 0mm, an outer radius of 0mm, and a central thickness of 2.3mm. The edge thickness is 3.1mm, and the lens is shaped as a multiplet. The curvature radii are R1 = 37.16mm, R2 = -26.28mm, and R3 = -76.48mm, providing the lens with its unique optical properties.
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