47-670 12.5 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=80mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12.5 mm
- EFL
- 80 mm
- R1
- 49.62 mm
- R2
- -35.73 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
47-670 12.5 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=80mm VIS 0° 425-675nm
The 47-670 is a high-quality achromatic doublet lens, boasting a 12.5 mm diameter and an effective focal length of 80mm, specifically designed for the visible light spectrum ranging from 425 to 675nm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available for purchase through their website.
The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott, ensuring excellent optical performance. The front and back surfaces of the lens are coated with the EDM VIS-0 standard curve coating, providing improved light transmission and protection against environmental factors.
The lens geometry is carefully designed with a 49.62mm radius for the first surface, a -35.73mm radius for the second surface, and a -103.22mm radius for the third surface. The edge thickness is 3.12mm, while the center thickness is 2.1mm, and the center a thickness is 1.6mm. The lens is circular in shape and classified as a multiplet due to its multiple glass elements.
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