49-281-INK 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=400mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- 400 mm
- R1
- 257.16 mm
- R2
- -169.03 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
49-281-INK 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=400mm VIS 0° 425-675nm
The 49-281-INK is a high-quality achromatic doublet lens, sourced from the renowned optical components manufacturer, Edmund Optics. This lens boasts a 40 mm diameter and is designed for use within the visible light spectrum, specifically between 425-675 nm. The lens is engineered to correct chromatic aberration, ensuring superior image quality and clarity.
The lens is composed of two elements, made from N-BK7 and N-SF5 Schott glass. These materials are chosen for their excellent optical properties, including high transparency and low dispersion. The lens features an effective focal length (EFL) of 400 mm, making it suitable for a wide range of optical applications.
The 49-281-INK lens is coated with EDM Vis-0 std curve on both the front and back surfaces. This coating enhances the lens's durability and resistance to environmental factors, while also reducing surface reflections and improving light transmission.
The lens's geometry is meticulously designed, with a center thickness of 8.5 mm and edge thickness of 11.3 mm. The lens's inner and outer radii are 0 mm, indicating a symmetrical design that ensures uniform image quality across the entire field of view.
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