49-320 9 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=75mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 9 mm
- EFL
- 75 mm
- R1
- 46.44 mm
- R2
- -33.77 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
49-320 9 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=75mm VIS-NIR 400-1000nm
The 49-320 is a high-quality achromatic doublet lens, sourced from the renowned optical components manufacturer, Edmund Optics. This lens is specifically designed for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning 400-1000nm. The lens features a 9mm diameter and an effective focal length (EFL) of 75mm, making it suitable for a wide range of optical applications.
The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott, a leading manufacturer of optical glass. This combination is used to correct chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. The achromatic design ensures that the lens focuses both red and blue light to the same point, providing sharper images and improved color accuracy.
The lens geometry includes a thickness of 4.28mm at the edge, with a central thickness of 3mm. The first and second radii of curvature are 46.44mm and -33.77mm, respectively, while the third radius of curvature is -95.94mm. The lens also features a broadband anti-reflection coating, edm visnir0sp2002000, on both the front and back surfaces, reducing surface reflections and increasing transmission.
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