45-213 25 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=85mm MgF2 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 85 mm
- R1
- 55.68 mm
- R2
- -38.37 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
45-213 25 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=85mm MgF2 400-700nm
The 45-213 is a high-quality achromatic doublet lens, boasting a 25 mm diameter and an effective focal length of 85mm. 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 standard MgF2 coating on both the front and back surfaces. This coating is part of Edmund Optics' standard curve, ensuring consistent performance and durability. The coating enhances the lens's light transmission capabilities, particularly in the 400-700nm spectrum, making it suitable for a wide range of optical applications.
The lens's geometry is carefully designed for optimal performance. The edge thickness is 6.05mm, while the center thickness is 5.01mm. The lens features three radii of curvature: r1 at 55.68mm, r2 at -38.37mm, and r3 at -146.45mm. These parameters contribute to the lens's overall optical power and performance.
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