49-279 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=250mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- 250 mm
- R1
- 156 mm
- R2
- -108.7 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
49-279 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=250mm VIS 0° 425-675nm
The 49-279 is a high-quality achromatic doublet lens, sourced from the renowned optical components vendor, 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 part of Edmund Optics' extensive catalog and is currently in stock, as indicated by its weblink status.
The lens is a multiplet, meaning it is composed of multiple optical elements. The geometry of the lens is carefully designed, with an effective focal length (EFL) of 250 mm, a thickness edge of 10.57 mm, and a center thickness of 8 mm. The lens also features an inner radius of 0 and an outer radius of 0, contributing to its compact design.
The lens is constructed from two types of high-grade optical glass: N-BK7 and N-SF5, both from Schott. These materials are known for their excellent optical properties, making them ideal for use in a wide range of applications. The lens is coated with Edmund Optics' standard VIS-0 coating on both the front and back surfaces, which enhances its light transmission capabilities within the specified visible light spectrum.
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