49-309 6.25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=35mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 6.25 mm
- EFL
- 35 mm
- R1
- 23.14 mm
- R2
- -14.51 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
49-309 6.25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=35mm VIS-NIR 400-1000nm
The 49-309 is a high-quality achromatic doublet lens, boasting a 6.25 mm diameter and an effective focal length (EFL) of 35mm, specifically designed for the visual (VIS) and near-infrared (NIR) spectrum, spanning 400-1000nm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for immediate use, as indicated by its valid in-stock weblink status.
The lens is constructed from two types of materials, N-BK7 and N-SF5, both from Schott, ensuring superior optical performance. The lens features a base shape of a circle, with a thickness of 2.86mm at the edge and 2.3mm at the center. The center thickness reduces to 0.9mm at the center a position. The inner and outer radii are 0mm, and the lens has a 23.14mm and -14.51mm curvature for the first and second surfaces, respectively, and -38.86mm for the third surface.
The lens is coated with edm visnir0sp2002000 on both the front and back surfaces, enhancing its performance in the VIS-NIR spectrum. The lens is classified as a multiplet due to its construction from multiple optical elements. This lens is an excellent choice for applications that require high-performance achromatic doublets in the VIS-NIR spectrum.
