49-355 25 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=45mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 45 mm
- R1
- 28.75 mm
- R2
- -21.38 mm
Material 1
- Name
- N-SK11
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5658215515592446
- λ
- 550 nm
- B1
- 1.17963631
- C1
- 0.00680282081 μm2
- B2
- 0.229817295
- C2
- 0.0219737205 μm2
- B3
- 0.935789652
- C3
- 101.513232 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
49-355 25 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=45mm VIS-NIR 400-1000nm
The 49-355 is a high-quality achromatic doublet lens, boasting a 25 mm diameter and an effective focal length (EFL) of 45mm, 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 purchase on their official website.
The lens is meticulously crafted from two distinct materials, N-SK11 and N-SF5, both from the reputable Schott glass catalog. This combination ensures superior optical performance, minimizing chromatic aberration and delivering sharp, clear images across the entire spectral range.
The 49-355 features a robust geometry, with an edge thickness of 7.08mm and a center thickness of 7.89mm. The lens's design includes three radii: r1 at 28.75mm, r2 at -21.38mm, and r3 at -82.92mm, further enhancing its optical capabilities. The lens also has an inner radius of 0mm and an outer radius of 0mm.
The lens is coated with Edmund Optics' proprietary VIS-NIR coating, denoted as edm visnir0sp2002000, on both the front and back surfaces. This coating is specifically designed to optimize performance in the VIS-NIR spectrum, ensuring minimal light loss and high transmission rates.
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