PAC085 38.1 mm Dia. N-BK7/N-SF5 Visible Achromatic Doublet; EFL=400mm MgF2 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- MKS/Newport
Properties
- Shape
- Circular
- Diameter
- 38.1 mm
- EFL
- 400 mm
- R1
- -179.33 mm
- R2
- -537.61 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
PAC085 38.1 mm Dia. N-BK7/N-SF5 Visible Achromatic Doublet; EFL=400mm MgF2 400-700nm
The PAC085 is a high-quality achromatic doublet lens from the renowned optical vendor MKS/Newport. This lens, with a diameter of 38.1 mm, is designed for use in the visible light spectrum, specifically between 400 and 700 nm.
The lens is constructed from two types of materials, N-BK7 and N-SF5, both from Schott, ensuring superior optical performance. The N-BK7, a borosilicate crown glass, is known for its low dispersion and high Abbe number, making it ideal for use in achromatic doublets. The N-SF5, a fluorite crown glass, further reduces dispersion, contributing to the lens's excellent chromatic correction.
The PAC085 features an effective focal length (EFL) of 400mm, making it suitable for a wide range of applications. The lens's geometry is meticulously designed, with a center thickness of 10.5mm, an edge thickness of 9.4mm, and radii of curvature of 243.196mm, -179.334mm, and -537.615mm for the first and second surfaces, respectively.
The lens is coated with MgF2, a broadband anti-reflection coating that enhances transmission in the visible spectrum. This coating is applied to both the front and back surfaces of the lens, ensuring optimal performance.
