47-651 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=500mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 500 mm
- R1
- 290.71 mm
- R2
- -232.07 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
47-651 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=500mm VIS 0° 425-675nm
The 47-651 is a high-quality achromatic doublet lens, boasting a 25 mm diameter and an effective focal length (EFL) of 500mm, specifically designed for the visible light spectrum ranging from 425 to 675nm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available for purchase through their official website.
The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott, ensuring excellent optical performance. The front and back surfaces of the lens are coated with the EDM VIS-0 standard curve coating, providing improved light transmission and protection against environmental factors.
The lens geometry is carefully designed with a 5.13mm edge thickness, zero inner and outer radii, and a center thickness of 3mm. The first and second radii of curvature are 290.71mm and -232.07mm, respectively, while the third radius of curvature is -750.52mm. This specific configuration helps to minimize chromatic aberration, a common issue in optical systems.
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