47-643-INK 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-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=150mm VIS 0° 425-675nm
The 47-643-INK is a high-quality achromatic doublet lens, sourced from Edmund Optics, offering impressive performance within the visible light spectrum of 425-675nm. This lens boasts a 25mm diameter and an effective focal length (EFL) of 150mm, making it suitable for a wide range of optical applications.
The lens is composed of two elements, the first made from N-BK7 Schott glass and the second from N-SF5 Schott glass. This combination helps to minimize chromatic aberration, a common issue in optical systems, by bringing two wavelengths into focus on the same plane. The lens features a standard anti-reflection coating on both the front and back surfaces, further enhancing its performance by reducing unwanted reflections and increasing transmission.
The lens geometry includes a central thickness of 5.7mm, with an edge thickness of 6.65mm. The curvature of the lens is defined by three radii: r1 at 91.37mm, r2 at -66.21mm, and r3 at -197.71mm. The lens is designed to be used with a standard curve, ensuring optimal performance in its intended applications.
