69-856 10 mm Dia. N-SF5 Precision Aspheric Lens; EFL=7.5mm; NA=0.67 BBAR 425-675nm
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 10 mm
- EFL
- 7.5 mm
- BFL
- 4.51 mm
- R1
- 5.05 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
69-856 10 mm Dia. N-SF5 Precision Aspheric Lens; EFL=7.5mm; NA=0.67 BBAR 425-675nm
This is the 69-856 model from Edmund Optics, a 10 mm diameter precision aspheric lens with a numerical aperture of 0.67. The lens is made from N-SF5 Schott, a high-refractive index glass, and is coated with BBAR 425-675nm on both the front and back surfaces.
The lens features an effective focal length (EFL) of 7.5mm, making it suitable for applications that require a short focal length. The aspheric design helps to reduce spherical aberration, improving the overall image quality. The lens has a base shape of circular, with an inner radius of 0 and an outer radius of 0.
The lens has a thickness of 2.21mm at the edge and 5mm at the center. The front and back surfaces have a radius of curvature of 5.045mm and 0mm respectively. The lens has a back focal length (BFL) of 4.51mm.
The lens is coated with BBAR 425-675nm, which reduces reflections and increases transmission in the visible spectrum from 425nm to 675nm. This coating enhances the performance of the lens in applications that require high transmission and low reflection, such as imaging and metrology.
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