title: [Calculation of optic system of superfine medical endoscopes based on gradient elements].
abstract: The application of gradient optic elements to rigid endoscopes decreases their diameter to 1.5-2.0 mm. The given mathematical dependences determine aperture and field characteristics, focus and focal segments, resolution of the optic systems based on gradient optics. Parameters of the gradient optic systems for superfine medical endoscopes are characterized and their practical application is shown.
authors.forename: S Iu
authors.initials: SIu
authors.lastname: Díakonov
authors.forename: A V
authors.initials: AV
authors.lastname: Korolev
mesh_terms: D019723:Endoscopes; D004867:Equipment Design; D008433:Mathematics; D013677:Medical Laboratory Science / Q000295:instrumentation*; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*