Achromatic lens doublet
- Reduce Spherical Aberration
- Form smaller points of light
Achromatic doublet lenes are composed of positive lenses with low refractive index (Crown Glass) and negative lenses with high refractive index (Flint Glass) . The spherical aberration, Coma Aberration and chromatic aberration are all corrected by computer optimization design. When used to focus collimation, the surface of convex Lens or small curvature radius usually faces collimating light. When used for imaging, the CONVEX Lens must be oriented toward the object distance or the longer side of the image distance. In the design, the dispersion values and the shape of the Lens are optimized at the three wavelengths of blue (486.1 nm) , green (546.1 nm) and red (656.3 nm) , and the minimum chromatic aberration is achieved. Thus, such lenses can be used throughout the visible light region.
Achromatic doublet lenses are designed to minimize or eliminate chromatic aberration, and their achromatic designs also help minimize spherical aberration, which is much smaller than for a single lens. When used in infinite conjugate state, the spherical aberration is minimum. Achromatic Lens is suitable for Fluorescence microscope, image relay, detection or spectral applications. Achromatic Lens is made by gluing two or more components together. Achromatic Lens can form smaller points of light than a single Lens.
|Effective focal length||120mm|
|Back focal length||118.286mm|
|Radius of curvature||R1=168.54mm，R2=76.25mm，R3=59.566mm|
|Refractive index||K9：517/640 ZF1：648/339|
Achromatic lens doublet, size(mm) and coating could be customized
|Model No.||Diameter(mm)||Focal length(mm)||Coating(nm)||Surface quality|
- Substrate: H-K9L
- Design Wavelength: 635nm, 520nm, 786nm, 530nm, 800nm, 655nm
- Focal Tolerance: ±1%Thickness Tolerance: ±0.2mmSurface precision(PV) <0.2μm
- Surface quality: 60-40Centering(Beam diviation): <90°
- Coating: Multiple antireflection coating, A:400-700nm, B:450-650nm, C:515-550nm, D:610-660nm