PAC055 25.4 mm Dia. N-BK7/N-SF5 Visible Achromatic Doublet; EFL=125mm MgF2 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- MKS/Newport
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 125 mm
- R1
- -56.06 mm
- R2
- -167.95 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
PAC055 25.4 mm Dia. N-BK7/N-SF5 Visible Achromatic Doublet; EFL=125mm MgF2 400-700nm
The PAC055 is a high-quality achromatic doublet lens from the renowned optical vendor MKS/Newport. This lens, with a diameter of 25.4 mm, is designed for use in the visible light spectrum, specifically between 400 and 700 nm.
The lens is a multiplet, meaning it is composed of multiple optical elements. In this case, it is made from two types of glass: N-BK7 and N-SF5, both from Schott. This combination helps to correct chromatic aberration, a common issue in lenses where different colors of light are focused at different points.
The PAC055 has an effective focal length (EFL) of 125mm, making it suitable for a variety of optical applications. The lens's geometry is carefully designed with an inner radius of 0 and an outer radius of 0, ensuring optimal light transmission. The thickness at the edge of the lens is 4.9mm, while the center thickness is 6.467mm, providing structural integrity and minimizing optical distortion.
The lens features a MgF2 coating on both the front and back surfaces. This coating, applied using the Newport figur method, reduces reflection and increases transmission in the visible spectrum, enhancing the overall performance of the lens.
