22-998 20mm Dia. N-SF6 Precision Aspheric Lens; EFL=15mm; NA=0.67 VIS-EXT Plus 350-700nm
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- 15 mm
- BFL
- 8.12 mm
- R1
- 12.08 mm
- R2
Material
- Name
- N-SF6
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.8051741184501493
- λ
- 587.6 nm
- B1
- 1.77931763
- C1
- 0.0133714182 μm2
- B2
- 0.338149866
- C2
- 0.0617533621 μm2
- B3
- 2.08734474
- C3
- 174.01759 μm2
22-998 20mm Dia. N-SF6 Precision Aspheric Lens; EFL=15mm; NA=0.67 VIS-EXT Plus 350-700nm
The 22-998 is a high-precision aspheric lens offered by Edmund Optics, boasting a 20mm diameter and a numerical aperture (NA) of 0.67. This lens is designed for use within the visible light spectrum, specifically between 350-700nm, making it suitable for a wide range of optical applications.
The lens is constructed from N-SF6 Schott, a high-quality optical glass known for its excellent transmission properties and chemical resistance. The aspheric design of the lens helps to reduce spherical aberration, thereby improving the overall image quality.
The lens features an effective focal length (EFL) of 15mm, which is the distance from the lens's principal point to its focal point. This EFL, combined with the lens's high NA, allows for a wide field of view and high light-gathering capability.
The lens's geometry includes an inner radius of 0mm, an outer radius of 0mm, a thickness at the edge of 7.97mm, and a thickness at the center of 12.42mm. The front and back surfaces of the lens are coated with Edmund Optics' VIS-EXT coating, which is designed to enhance transmission within the specified wavelength range.
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