47-647-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=250mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 250 mm
- R1
- 160.73 mm
- R2
- -105.64 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
47-647-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=250mm VIS 0° 425-675nm
The 47-647-INK is a high-quality Achromatic Doublet Lens, boasting a 25 mm diameter and an effective focal length (EFL) of 250mm, 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.
This lens is a multiplet, meaning it is composed of multiple optical elements. The primary materials used in its construction are N-BK7 and N-SF5, both renowned for their optical clarity and precision. The lens features a standard curvature on both the front and back surfaces, which are coated with Edmund Optics' Vis-0 standard curve coating to enhance transmission and durability.
The lens has a thickness of 6.75mm at the edge, reducing to 5mm at the center, and 2.5mm at the center a. The inner and outer radii are 0, indicating a circular shape. The first radius of curvature (r1) is 160.73, while the second radius (r2) is -105.64, and the third radius (r3) is -295.75. These specifications contribute to the lens's high-performance optical characteristics.
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