49-358-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=75mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 75 mm
- R1
- 46.44 mm
- R2
- -33.77 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
49-358-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=75mm VIS-NIR 400-1000nm
The 49-358-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 25 mm, is designed for use in the visible to near-infrared spectrum, spanning 400-1000nm, making it suitable for a wide range of optical applications.
The lens features a focal length of 75mm, indicated by the EFL (Effective Focal Length) parameter. This focal length, combined with the lens's diameter, allows for a compact, yet powerful optical system. The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott, ensuring high-quality optical performance.
The geometry of the lens is carefully designed, with a central thickness of 7mm and edge thickness of 6.97mm. The lens's inner and outer radii are 0, indicating a circular shape. The lens's first radius of curvature (r1) is 46.44mm, while the second radius (r2) is -33.77mm, and the third radius (r3) is -95.94mm. These radii contribute to the lens's achromatic properties, minimizing chromatic aberration.
The lens is coated with edm visnir0sp2002000 on both the front and back surfaces. This coating enhances the lens's performance in the visible to near-infrared spectrum, reducing reflection and increasing transmission. The lens is a multiplet, meaning it is composed of multiple elements, contributing to its high-performance characteristics.
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