47-649-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=300mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 300 mm
- R1
- 184.84 mm
- R2
- -134.06 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
47-649-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=300mm VIS 0° 425-675nm
The 47-649-INK is a high-quality achromatic doublet lens, boasting a 25 mm diameter and effective focal length (EFL) of 300mm, 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.
This doublet lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott, ensuring excellent optical performance. The lens features a standard curve coating on both the front and back surfaces, identified as 'edm vis-0 std curve'. This coating enhances the lens's durability and overall light transmission, making it suitable for a wide range of applications.
The lens geometry is carefully designed with a 4.88mm thickness at the edge, 3mm thickness at the center, and 2.5mm thickness at the center 'a'. The inner and outer radii are 0, and the lens has a shape classified as a multiplet. The first and second radii are 184.84mm and -134.06mm, respectively, while the third radius is -393.98mm.
