67-248 50 mm Dia. N-SF5 Precision Aspheric Lens; EFL=30mm; NA=0.83 Uncoated
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 50 mm
- EFL
- 30 mm
- BFL
- 18.04 mm
- R1
- 20.18 mm
- R2
Material
- Name
- N-SF5
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6727030184452947
- λ
- 587.6 nm
- B1
- 1.52481889
- C1
- 0.011254756 μm2
- B2
- 0.187085527
- C2
- 0.0588995392 μm2
- B3
- 1.42729015
- C3
- 129.141675 μm2
67-248 50 mm Dia. N-SF5 Precision Aspheric Lens; EFL=30mm; NA=0.83 Uncoated
The 67-248 is a high-precision aspheric lens offered by Edmund Optics. This lens, with a catalog number 67-248, is made from N-SF5 Schott, a high-quality optical glass known for its excellent transmittance and low autofluorescence. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties.
The lens has a base shape of a circle and a diameter of 50 mm. The edge thickness of the lens is 1.44 mm, and it has an effective focal length (EFL) of 30 mm. The numerical aperture (NA) of the lens is 0.83, indicating a high light-gathering capacity.
The lens's geometry is defined by its inner and outer radii, both of which are 0 mm in this case. The lens's thickness at the edge is 1.44 mm, and it increases to 20 mm at the center. The lens's first radius of curvature (R1) is 20.181 mm, and the second radius of curvature (R2) is 0 mm, indicating that the lens is asymmetric.
The lens's conic constant (K1) is -0.951449, which is a measure of the lens's departure from a spherical shape. The NA, R1, and K1 values suggest that this lens is designed for high-performance applications.
The lens is designed to operate at a wavelength of 587.6 nm. It is important to note that the lens's performance can vary depending on the wavelength of light used.
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