47-643 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=150mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 150 mm
- R1
- 91.37 mm
- R2
- -66.21 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
47-643 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=150mm VIS 0° 425-675nm
The 47-643 is a high-quality achromatic doublet lens, boasting a 25 mm diameter and an effective focal length (EFL) of 150mm, specifically designed for the visible light spectrum ranging from 425 to 675nm. This lens is sourced from the renowned optical components manufacturer, Edmund Optics, and is available for purchase through their official website.
The lens is constructed from two types of glass: N-BK7 from Schott and N-SF5 from Schott. These materials are carefully selected to minimize chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. By combining these materials, the 47-643 achieves superior image quality and color correction.
The lens geometry is meticulously designed, with an inner radius of 0mm, an outer radius of 0mm, and a center thickness of 5.7mm. The edge thickness is 6.65mm, and the lens features a curvature of r1=91.37mm, r2=-66.21mm, and r3=-197.71mm. This complex geometry ensures optimal light transmission and focusing.
The 47-643 is coated with Edmund Optics' standard Vis-0 coating on both the front and back surfaces. This coating is specifically designed for the visible light spectrum and enhances the lens's overall light transmission and durability.
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