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Correction of chromatism of dual-infrared zoom lenses

G.I. Greisukh 1, E.G. Ezhov 1, A.I. Antonov  1

1 Penza State University of Architecture and Construction, Penza, Russia

 PDF, 772 kB

DOI: 10.18287/2412-6179-CO-623

Pages: 177-182.

Full text of article: Russian language.

Abstract:
Using the example of a simple-by-design mid-wave and long-wave dual-band infrared zoom lens consisting of three two-lens components made of silicone and germanium, the possibility of reducing chromatic and monochromatic aberrations to a level that ensures sufficiently high quality of the formed image is demonstrated at spatial frequencies of up to 25 inverse millime-ters. As one of the possible ways to modify the zoom lens, it is proposed to place a two-layer two-relief diffractive microstructure on the flat surface of the refractive lens closest to the aperture stop. The efficiency of the transition to the refractive-diffraction scheme is confirmed by the results of calculation and optimization of a zoom lens, the two-lens components of which are made of silicone and amorphous glass of the IRG26 brand..

Keywords:
dual-infrared range, chromatism, two-lens component, refractive and refractive-diffractive zoom lens.

Citation:
Greisukh GI, Ezhov EG, Antonov AI. Correction of chromatism of dual-infrared zoom lenses. Computer Optics 2020; 44(2): 177-182. DOI: 10.18287/2412-6179-CO-623.

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