49-368-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=300mm VIS-NIR 400-1000nm
- 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
49-368-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=300mm VIS-NIR 400-1000nm
The 49-368-INK is a high-quality achromatic doublet lens, designed and manufactured by Edmund Optics. This lens, with a diameter of 25 mm, is specifically engineered for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning from 400 to 1000 nm. The lens boasts an effective focal length (EFL) of 300 mm, making it suitable for a wide range of optical applications.
The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott. This combination is used to correct chromatic aberrations, ensuring high-quality imaging. The lens features a geometry with a thickness of 4.88 mm at the edge, and a center thickness of 3 mm and 2.5 mm (designated as 'thickness center a'). The inner and outer radii are 0, indicating a simple, circular shape.
The 49-368-INK lens comes with a coating on both the front and back surfaces. The coating, edm visnir0sp2002000, is specifically designed for use in the VIS-NIR spectrum, enhancing the lens's performance and durability.
This lens is a multiplet, meaning it is composed of multiple elements. The curvature of these elements is defined by the radii r1, r2, and r3, which are 184.84 mm, -134.06 mm, and -393.98 mm, respectively.
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