85-877 6.25 mm Dia. N-BAF10/N-SF10 Negative Achromatic Doublet; EFL=-10mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 6.25 mm
- EFL
- -10 mm
- R1
- 6.55 mm
- R2
- 5.1 mm
Material 1
- Name
- N-BAF10
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6730569473646495
- λ
- 550 nm
- B1
- 1.5851495
- C1
- 0.00926681282 μm2
- B2
- 0.143559385
- C2
- 0.0424489805 μm2
- B3
- 1.08521269
- C3
- 105.613573 μm2
Material 2
- Name
- N-SF10
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.7336618876174243
- λ
- 550 nm
- B1
- 1.62153902
- C1
- 0.0122241457 μm2
- B2
- 0.256287842
- C2
- 0.0595736775 μm2
- B3
- 1.64447552
- C3
- 147.468793 μm2
85-877 6.25 mm Dia. N-BAF10/N-SF10 Negative Achromatic Doublet; EFL=-10mm VIS-NIR 400-1000nm
The 85-877 is a high-quality negative achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens is specifically designed for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning 400-1000nm.
The lens features a 6.25mm diameter and an effective focal length (EFL) of -10mm, making it suitable for a wide range of optical applications. The lens is constructed from two types of Schott glass, N-BAF10 and N-SF10, which are known for their excellent optical properties.
The lens geometry includes a thickness of 4.2mm at the edge, a center thickness of 1mm, and a central thickness 'a' of 2.5mm. The radii of curvature are R1=6.55mm, R2=5.1mm, and R3=89.1mm. The lens is coated with a broadband anti-reflection coating, edm visnir0sp2002000, on both the front and back surfaces, ensuring high transmission and minimal reflection across the entire spectral range.
This lens is a multiplet, meaning it is composed of multiple elements, which allows it to correct for chromatic aberration, a common issue in optical systems. The multiplet design also provides superior image quality, making it an ideal choice for applications requiring high-resolution imaging.
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