49-351-INK 20 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=60mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- 60 mm
- R1
- 35.92 mm
- R2
- -28.12 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
49-351-INK 20 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=60mm VIS-NIR 400-1000nm
The 49-351-INK is a high-quality achromatic doublet lens, designed and manufactured by Edmund Optics. This lens, with a diameter of 20 mm, is specifically engineered for use in the visible to near-infrared spectrum, spanning from 400 to 1000 nm. The lens is part of Edmund Optics' extensive catalog, and it is currently in stock, as indicated by its weblink status.
The lens is a multiplet, meaning it is composed of multiple optical elements. The geometry of the lens is carefully crafted, with an effective focal length (EFL) of 60 mm, providing a balanced balance between field of view and focus. The lens's edge thickness is 4.98 mm, and it has a center thickness of 5 mm, ensuring structural integrity and minimal distortion.
The lens is made from two types of high-quality glass: N-BK7 and N-SF5, both from Schott. These materials are chosen for their excellent optical properties, including low dispersion and high transmittance in the specified wavelength range. The lens is coated with Edmund Optics' VIS-NIR-0SP2002000 coating on both the front and back surfaces, enhancing its overall light transmission and durability.
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