PAC028 12.7 mm Dia. N-BK7/N-SF5 Visible Achromatic Doublet; EFL=50.8mm MgF2 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- MKS/Newport
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
- EFL
- 50.8 mm
- R1
- -22.71 mm
- R2
- -67.62 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
PAC028 12.7 mm Dia. N-BK7/N-SF5 Visible Achromatic Doublet; EFL=50.8mm MgF2 400-700nm
The PAC028 is a high-quality achromatic doublet lens from MKS/Newport, designed for use in the visible spectrum, specifically between 400 and 700nm. This lens is a multiplet, meaning it is composed of multiple optical elements, in this case, two, to achieve superior optical performance.
The lens has a diameter of 12.7mm and a total thickness of 3.5mm at the edge. The inner and outer radii are 0, indicating a circular shape. The effective focal length (EFL) of the lens is 50.8mm, making it suitable for a variety of optical applications.
The PAC028 features two different materials: N-BK7 from Schott and N-SF5 from Schott. These materials are known for their excellent optical properties, contributing to the lens's high performance. The lens is coated with MgF2 on both the front and back surfaces, which enhances its transmission in the visible spectrum.
The lens's geometry is carefully designed to optimize its performance. It has a front radius (r) of 30.856mm, a first rear radius (r1) of -22.713mm, and a second rear radius (r2) of -67.617mm. The thickness at the center of the first and second elements are 3mm and 1.5mm, respectively, with a total center thickness of 4.5mm.
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