47-640-INK 25 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=85mm VIS 0° 425-675nm
- 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
47-640-INK 25 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=85mm VIS 0° 425-675nm
The 47-640-INK is a high-quality Achromatic Doublet Lens, boasting a 25 mm diameter and an effective focal length (EFL) of 85mm, specifically designed for the visible spectrum (425-675nm). This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase on their official website.
The lens is constructed from two types of Schott glass, N-SK11 and N-SF5, which are carefully selected to minimize chromatic aberration, a common issue in lens systems. The front and back surfaces of the lens are coated with EDM VIS-0 standard curve coatings, enhancing its light transmission capabilities and overall performance.
The lens geometry is meticulously designed, with a thickness of 6.05mm at the edge, a center thickness of 5.01mm, and a thickness of 3mm at the center a. The lens features three radii of curvature: r1 at 55.68mm, r2 at -38.37mm, and r3 at -146.45mm. The inner and outer radii are both zero, indicating a circular shape.
This lens is a Multiplet, a type of lens system composed of multiple elements. The multiplet design enhances the lens's optical performance, making it suitable for a wide range of applications. The 47-640-INK is currently in stock, ready for immediate purchase and use in your optical system.
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