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How to avoid aberrations in the optical imaging?

May. 14, 2020

The imaging of optical systems actually is not really perfect. After the light transmits through every surface of optical components in optical systems, a variety of aberrations will be formed, which will make the imaging blurred, deformed and other defects. Optical aberration is a total concept of faulty imaging in optical systems. Correcting the aberrations and imaging effects of each optical element in the optical system is particularly critical. CLZ Precision Optical Co., Ltd. provides you custom optical components with high precision, including optical lenses, optical domes, optical windows, optical reflectors, optical prisms and other optical components.

Optical lenses converge or diverge the light beam and form the image of the object at the target position. Therefore, optical lens is an indispensable optical element in the optical imaging system and the illumination system. When the light transmits, due to the influence of factors such as refraction, reflection, diffraction, and defects of optical components etc., spherical aberration, coma, astigmatism, field curvature, distortion, chromatic aberration, etc. occur and effect greatly the imaging of optical systems. In addition to perfect and reasonable design of optical systems, achromatic lenses and optical components with high quality are often used to correct aberrations.

Spherical aberration, coma and astigmatism can be eliminated at some special points of optical lens. Such lenses are often used in the design of microscope objectives with large aperture, which can not only meet the large aperture requirements of the entire objective system, but also facilitate the correction of aberrations. However, in other cases where optical lenses are used, the distance between the lens and the object is often not fixed. Therefore, the single lens cant fully meet the requirements of correcting aberrations. The combinations of optical lenses and achromatic lenses are commonly used in optical systems to correct aberrations.

Achromatic lenses are designed for broadband applications, including astronomy, color photomicrography, plasma spectroscopy and biomedical instruments. Achromatic lenses are composed of two or more lens elements, and the single lenses are made from different glass materials. Achromatic lenses usually correct the chromatic aberration of the blue and red wavelengths. The chromatic aberration of the two single lenses compensate each other. Apochromatic lenses  correct also the third wavelength to minimize spherical aberration and chromatic aberration at the three wavelengths. Apochromatic lenses are often used in high-precision micromachining and imaging. UV achromatic lenses are ideal for broadband applications in the UV spectral range, such as optical instruments and fluorescence analysis. In some cases, apochromatic lenses can be used as a focusing lens instead of a condenser lens.

CLZ Precision Optical Co., Ltd. produces achromatic lenses according to your design and applications. We also provide other optical components, which match with achromatic lenses, such as optical mirrors, optical lenses and optical prisms. Looking forward to your inquiry, please contact