APOCHROMATIC MICROLENS Russian patent published in 2003 - IPC

FIELD: optics. SUBSTANCE: microlens includes four components, first and second components being positive meniscuses facing one another with convexity, third component being cemented of negative meniscus and biconvex lens, fourth component being composite positive lens. Dispersion factor of optical material of second component is 0.3-0.6 of dispersion factor of first component. Fourth component comprises biconvex or meniscus-shaped positive lens and negative meniscus facing image with convexity, Lenses of fourth component are made of materials which parameters are interrelated by relations specified in formula of invention. EFFECT: improved quality of image thanks to provision of high resolution and aperture ratio, increased entrance and exit apertures with preservation of simplified design and adaptability of microlens to manufacture. 1 dwg