45-212 25 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=45mm MgF2 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 45 mm
- R1
- 28.75 mm
- R2
- -21.38 mm
Material 1
- Name
- N-SK11
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5658215515592446
- λ
- 550 nm
- B1
- 1.17963631
- C1
- 0.00680282081 μm2
- B2
- 0.229817295
- C2
- 0.0219737205 μm2
- B3
- 0.935789652
- C3
- 101.513232 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
45-212 25 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=45mm MgF2 400-700nm
The 45-212 is a high-quality achromatic doublet lens, boasting a 25 mm diameter and a focal length of 45 mm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase on their official website. The product link provided is currently valid and indicates that the item is in stock.
The lens is constructed from two types of glass, N-SK11 and N-SF5, both from the reputable Schott glass catalog. This combination allows for superior optical performance, particularly in managing chromatic aberration, a common issue in lens systems.
The lens features a front and back coating of EDM MgF2, a standard coating that provides excellent anti-reflection properties across the visible spectrum (400-700 nm). This coating enhances the lens's light transmission capabilities, reducing unwanted reflections and improving overall image quality.
The geometry of the lens is carefully designed, with an inner radius of 0 and an outer radius of 0, indicating a symmetrical design. The edge thickness is 7.08, while the center thickness is 7.89, with an additional 3 mm of center thickness 'a'. The lens's radii are R1 = 28.75, R2 = -21.38, and R3 = -82.92, which contribute to its specific optical properties.
