DIFFRACTIVE OPTICS, OPTICAL TECHNOLOGIES

Designing an ultra-wide-angle microlens for a capsule medical endoscope

G. I. Greisukh^a, I. A. Levin^b, S. V. Kazin<sup>a

a</sup> Penza State University of Architecture and Construction
^b Krasnogorsk Factory named after S. A. Zverev

Abstract: Requirements for the optical tract of a capsule medical endoscopic system with a frontal location of the object under research are summarized. It is shown that the optical layout of a microlens built from easy-to-fabricate modern plastics not only allows satisfying generalized requirements, but also opens up the possibility of obtaining a significantly higher-quality image in simple-design lenses compared with well-known analogs. This is confirmed by the presented results of calculating a microlens with a rela-tive aperture of $1: 2.4$ and an angular field of view of $2\omega=170^{\circ}$, which forms an image with a diameter of $2.7$ mm with a resolution of at least $188~mm^{–1}$, and a contrast of $0.5$.

Keywords: capsule endoscope, ultra-wide-angle microlens, composition of optical scheme, optical performance

Received: 06.06.2021
Accepted: 07.10.2021

DOI: 10.18287/2412-6179-CO-935