47-644-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=175mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 175 mm
- R1
- 109.16 mm
- R2
- -79.38 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
47-644-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=175mm VIS 0° 425-675nm
The 47-644-INK is a high-quality achromatic doublet lens, sourced from Edmund Optics, designed with a 25 mm diameter and a focal length of 175 mm. This lens is specifically engineered for the visible spectrum, covering wavelengths from 425 to 675 nm.
The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott, ensuring excellent optical performance. The use of these materials helps to minimize chromatic aberration, a common issue in lens systems, providing clear and sharp images.
The lens features a standard anti-reflection coating on both the front and back surfaces, specifically the EDM VIS-0 STD curve. This coating reduces unwanted reflections and increases transmission, enhancing the overall performance of the lens.
The geometry of the lens includes a thickness of 7.94 mm at the edge, a center thickness of 6 mm, and a center thickness 'a' of 3 mm. The lens also features a radius of curvature of 109.16 mm for the first surface, -79.38 mm for the second surface, and -226.03 mm for the third surface.
The lens is available for purchase directly from the Edmund Optics website, and the link provided is valid and indicates that the lens is currently in stock.
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