47-712 18 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=125mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 18 mm
- EFL
- 125 mm
- R1
- 76.92 mm
- R2
- -55.48 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
47-712 18 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=125mm VIS 0° 425-675nm
The 47-712 is an 18 mm diameter achromatic doublet lens, designed and manufactured by Edmund Optics. This lens boasts an effective focal length (EFL) of 125mm, specifically tailored for the visible light spectrum, spanning 425-675nm. The lens is meticulously crafted from two distinct materials, N-BK7 and N-SF5, sourced from Schott, ensuring optimal performance and durability.
The lens features a sophisticated geometry, with a thickness of 5.72mm at the edge, and a center thickness of 4.5mm. The inner and outer radii are both zero, indicating a circular shape. The lens's first radius of curvature (r1) is 76.92mm, while the second radius (r2) is -55.48mm, and the third radius (r3) is -162.59mm. These specifications contribute to the lens's exceptional optical properties.
The 47-712 lens is equipped with a standard anti-reflective coating, both on the front and back surfaces. This coating, identified as 'edm vis-0 std curve', is specifically designed to minimize surface reflections and optimize light transmission within the specified visible light spectrum.
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