47-698-INK 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-INK 6.25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=60mm VIS 0° 425-675nm
The 47-698-INK 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, ensuring superior optical performance. The front and back surfaces of the lens are coated with EDM VIS-0 STD CURVE, a broadband anti-reflection coating, which enhances light transmission and reduces surface reflections.
The lens geometry is meticulously designed, with a thickness of 3.1mm at the edge, 2.3mm at the center, and a central thickness of 1mm. The lens features three radii of curvature: r1 at 37.16mm, r2 at -26.28mm, and r3 at -76.48mm. The inner and outer radii are both zero, indicating a circular shape.
This lens is a multiplet, meaning it is composed of multiple elements, which allows for the correction of optical aberrations. The multiplet design, combined with the high-quality materials and coatings, makes this lens an excellent choice for a wide range of optical applications.
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