49-306-INK 6.25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=20mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 6.25 mm
- EFL
- 20 mm
- R1
- 12.3 mm
- R2
- -8.71 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
49-306-INK 6.25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=20mm VIS-NIR 400-1000nm
The 49-306-INK is a high-quality achromatic doublet lens, designed and manufactured by Edmund Optics. This lens, with a diameter of 6.25 mm, is specifically engineered for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning from 400 to 1000 nanometers.
The lens features an effective focal length (EFL) of 20 mm, making it suitable for a wide range of optical applications. The achromatic design ensures that the lens effectively compensates for chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points.
The lens is composed of two elements, the first made from N-BK7 Schott glass and the second from N-SF5 Schott glass. Both elements are coated with Edmund Optics' VIS-NIR 0SP2002000 coating, which provides superior anti-reflection properties, enhancing the overall performance of the lens.
The geometry of the lens is carefully crafted, with a central thickness of 2.7 mm and edge thickness of 3 mm. The lens also features a first radius (r1) of 12.3 mm and a second radius (r2) of -8.71 mm, ensuring optimal light transmission and focus.
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