47-697-INK 6.25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=50mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 6.25 mm
- EFL
- 50 mm
- R1
- 30.77 mm
- R2
- -22.05 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
47-697-INK 6.25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=50mm VIS 0° 425-675nm
The 47-697-INK is a high-quality achromatic doublet lens, boasting a 6.25 mm diameter and an effective focal length (EFL) of 50mm, specifically designed for the visible light spectrum ranging from 425 to 675nm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase through their website.
This achromatic doublet is composed of two individual lenses made from different materials: N-BK7 and N-SF5, both from Schott. The N-BK7, a borosilicate crown glass, is known for its excellent optical properties and durability. The N-SF5, a dense flint glass, offers high dispersion and is often used in achromatic doublets to correct chromatic aberration.
The lens geometry is meticulously designed, with an inner radius of 0mm, an outer radius of 0mm, and a center thickness of 2mm. The edge thickness is 2.77mm, and the lens features a standard curvature coating on both the front and back surfaces, enhancing its light transmission capabilities.
The 47-697-INK is a multiplet lens, meaning it is composed of multiple elements. This design allows for superior optical performance, making it suitable for a wide range of applications where high-resolution imaging and minimal chromatic aberration are required.
