Edmund Optics LensSelector

As shown, the use of high performance optical lenses, such as TECHSPEC hybrid aspheric lenses, TECHSPEC aspheric lenses, or TECHSPEC achromatic lenses, can greatly improve the performance of an optical system. Using high performance optical lenses minimizes both the spot size and chromatic focal shift.

Optical designers use a variety of tools to recognize, and try to correct for, aberrations. These tools often include computer generated spot diagrams and chromatic focal shift comparisons. Spot diagrams represent an estimation of the smallest spot size an optical lens can focus to. Chromatic focal shift displays the focal length of an optical lens over different wavelengths. A smaller spot size and lower degree of chromatic focal shift are the superior options. See the benefits of color-corrected optical lenses by comparing spot diagrams and chromatic focal shift graphs of TECHSPEC hybrid aspheric lenses, TECHSPEC aspheric lenses, and TECHSPEC achromatic lenses.

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Chromatic aberration occurs in conventional optical lenses when different wavelengths of light focus at different points along the optical axis, and is typically eliminated by introducing multiple lenses, fabricated from glasses with different indices of refraction, into an optical assembly. However, by eliminating chromatic aberration with color-corrected aspheric lenses, an imaging system with fewer lenses can be designed. Reducing the element count not only minimizes the size and weight of the assembly, but it also simplifies the assembly process, yielding imaging lenses that ultimately cost less and outperform assemblies made of traditional spherical optical components. For more in-depth information on chromatic aberration, please read Chromatic and Monochromatic Optical Aberrations.

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Knowledge Center/ Application Notes/ Optics Application Notes/ The Benefits of Color-Corrected Optical Lenses

Minimizing the number of lenses in an optical assembly is a critical design consideration. Selecting single optical lenses that can simultaneously reduce multiple aberrations is an ideal way to achieve this goal. Color-corrected aspheric lenses, for instance, reduce both spherical and chromatic aberration, making them ideal for a range of applications where precision results and image quality are key.