49-306 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 6.25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=20mm VIS-NIR 400-1000nm
The 49-306 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 1000nm.
The lens features a focal length (EFL) of 20mm, making it suitable for a wide range of optical applications. The achromatic design, which combines two different types of glass (N-BK7 and N-SF5), effectively reduces chromatic aberration, ensuring sharp and clear images across the entire spectral range.
The geometry of the lens includes a thickness of 3mm at the edge, a central thickness of 2.7mm, and a central thickness 'a' of 0.9mm. The lens also features inner and outer radii of 0mm, and radii 'r1' and 'r2' of 12.3mm and -8.71mm respectively. The 'r3' radius is -24.98mm.
The lens is coated with Edmund Optics' proprietary VIS-NIR coating (edm visnir0sp2002000) on both the front and back surfaces, enhancing its transmission characteristics and overall performance in the VIS-NIR spectrum.
