49-374 30 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=100mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 30 mm
- EFL
- 100 mm
- R1
- 61.36 mm
- R2
- -44.3 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
49-374 30 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=100mm VIS-NIR 400-1000nm
The 49-374 is a high-quality achromatic doublet lens, boasting a 30 mm diameter and a focal length of 100mm, 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 a multiplet type, ensuring superior image quality and minimal chromatic aberration.
The lens is crafted from two types of Schott glass, N-BK7 and N-SF5, which are renowned for their excellent optical properties. The N-BK7, a borosilicate crown glass, is known for its low dispersion and high homogeneity, while the N-SF5, a fluorite crown glass, offers a low refractive index and low dispersion. This combination results in a lens with superior imaging capabilities and minimal chromatic aberration.
The lens features a front and back coating of EDMM VISNIR0SP2002000, a broadband anti-reflection coating designed for the 400-1000nm range. This coating enhances the lens's light transmission capabilities, reducing unwanted reflections and improving overall image quality.
The lens geometry includes an outer radius of 0mm, an inner radius of 0mm, and a thickness at the edge of 8.31mm. The thickness at the center is 8.25mm, with an additional thickness at the center 'a' of 2.8mm. The radii of curvature are R1: 61.36mm, R2: -44.3mm, and R3: -128.9mm.
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