47-645-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=200mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 200 mm
- R1
- 124.12 mm
- R2
- -87.26 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
47-645-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=200mm VIS 0° 425-675nm
The 47-645-INK is a high-quality achromatic doublet lens, sourced from the renowned optical components manufacturer, Edmund Optics. This lens boasts a 25 mm diameter and an effective focal length (EFL) of 200mm, specifically designed for the visible light spectrum ranging from 425 to 675nm.
The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott, ensuring superior optical performance. The achromatic design of this doublet lens effectively compensates for chromatic aberration, a common issue in optical systems, resulting in clear, sharp images.
The lens features a standard anti-reflection coating on both the front and back surfaces, specifically the EDM VIS-0 STD CURVE coating. This coating enhances the lens's light transmission capabilities, reduces surface reflections, and increases the overall system's efficiency.
The lens geometry is meticulously designed, with a central thickness of 8.5mm and edge thickness of 11.56mm. The lens's curved surfaces have radii of 124.12mm, -87.26mm, and -253.1mm, contributing to its excellent optical performance.
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