22-756 12.5mm Dia. N-SF6 Precision Aspheric Lens; EFL=9.5mm; NA=0.66 SWIR-Plus 900-1700nm
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12.5 mm
- EFL
- 9.5 mm
- BFL
- 5.23 mm
- R1
- 7.65 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
22-756 12.5mm Dia. N-SF6 Precision Aspheric Lens; EFL=9.5mm; NA=0.66 SWIR-Plus 900-1700nm
This is a high-precision aspheric lens, catalog number 22-756, offered by Edmund Optics. It is designed for use in the shortwave infrared (SWIR) region, specifically for wavelengths between 900nm and 1700nm. The lens is made from N-SF6 Schott glass, a material known for its excellent transmission properties in the SWIR region.
The lens has a diameter of 12.5mm and a numerical aperture (NA) of 0.66, indicating a wide acceptance angle and high light-gathering capability. The effective focal length (EFL) is 9.5mm, suggesting a relatively compact optical system. The lens is coated with Edmund Optics' SWIR-Plus coating, which enhances its transmission in the SWIR region.
The lens geometry is also noteworthy. It has an inner radius of 0mm and an outer radius of 0mm, suggesting a symmetric design. The thickness at the edge is 4.96mm, while the thickness at the center is 7.7mm. The lens features a front radius of curvature (R1) of 7.649mm and a back radius (R2) of 0mm. The back focal length (BFL) is 5.23mm.
The lens's aspheric shape is defined by a conic constant (k1) of -1.280869 and higher-order aspheric terms (k2, k3, etc.) of 0. This shape allows for superior optical performance compared to a simple spherical lens, particularly in terms of reduced spherical aberration and improved image quality.
