45-218 40 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=60mm MgF2 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- 60 mm
- R1
- 37.33 mm
- R2
- -31.54 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
45-218 40 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=60mm MgF2 400-700nm
The 45-218 is a high-quality achromatic doublet lens, boasting a 40 mm diameter and an effective focal length of 60 mm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase on their official website. The product page indicates that it is currently in stock, ensuring quick delivery for interested buyers.
The lens is composed of two elements, made from N-SK11 and N-SF5 Schott glass. These materials are known for their excellent optical properties, contributing to the lens's high performance. The lens features a standard MgF2 coating on both the front and back surfaces, which enhances its light transmission capabilities within the 400-700 nm spectral range.
The lens's geometry is meticulously designed, with a 37.33 mm radius of curvature for the first surface, a -31.54 mm radius for the second surface, and a -124.51 mm radius for the third surface. The center thickness is 14.46 mm, while the edge thickness is 10.03 mm. The lens also features a 3 mm air gap at the center, adding to its complex yet precise design.
