37-437 40mm Dia. N-SF5 Precision Aspheric Lens; EFL=40mm; NA=0.5 Uncoated
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- 40 mm
- BFL
- 31.21 mm
- R1
- 26.91 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
37-437 40mm Dia. N-SF5 Precision Aspheric Lens; EFL=40mm; NA=0.5 Uncoated
This is the 37-437 model from Edmund Optics, a high-precision aspheric lens with a 40mm diameter and a numerical aperture of 0.5. The lens is made of N-SF5 Schott, a high-refractive index glass, and is uncoated.
The lens has an effective focal length (EFL) of 40mm, making it suitable for applications that require a long focal length. The inner radius of the lens is 0, while the outer radius is also 0, indicating a symmetrical design. The lens has a thickness of 6.83mm at the edge and 14.7mm at the center.
The aspheric design of the lens is characterized by its radii of curvature (r1 and r2), both of which are non-zero. The first radius of curvature (r1) is 26.91mm, while the second radius of curvature (r2) is 0mm. This design helps to minimize spherical aberration, a common issue in traditional spherical lenses.
The lens also has a high numerical aperture (NA) of 0.5, which allows for a wide angle of view and high light-gathering capability. The front diameter of the lens is 0mm, and it has a back focal length (BFL) of 31.21mm.
The lens is uncoated, which means it does not have any anti-reflective coatings. While this may result in higher reflective losses, it also means that the lens is more robust and less prone to damage.
