Size measurements of an optical fiber by diffraction pattern analysis in Fraunhofer approximation

Boumrar, Karima; Boukellal, Ali; Pfeiffer, Pierre; Mokdad, Rabah

doi:10.1117/12.2306570

Cited by 1 publication

(1 citation statement)

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“…The light diffraction phenomenon [3] is used to increase the accuracy of measurement of thin wires diameter. A ray of light, bending around a thin product, creates a diffraction picture which is the function of a diameter (Fig.…”

Section: Introductionmentioning

confidence: 99%

Diffraction Control Methods of Extended Products’ Diameter

Fedorov

Chicherina

Tlustý

et al. 2019

MSF

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In this paper the measurement methods for extended objects’ geometry on the basis of effect of light diffraction which can be applied to technological control of products with wide range of diameters from the smallest to the largest are described. During measurement the method that allows to minimize the influence of disturbing factors on the results of measurements of diameter of thin fibers of small diameters of micron is described. Disturbing factors include excessive flare of area of the central maximum range. The diffraction method is considered that allows to increase to units of micrometers the resolution of the optical measuring converters used in devices to perform technological control of cylindrical extended products of a large diameter such as: cables, wires, cords, etc. The transformation function allowing to calculate diameter of cylindrical products irrespective of their location in a control zone on the basis of the diffraction method of delimitation of the product shadow in optical two-coordinate converters with the dispersing laser bunch is offered and experimentally confirmed. The achieved results can be used for development of high-precision optical devices of technological control of outer diameter and eccentricity of products for cable, pipe and other products in different industry fields.

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Section: Introductionmentioning

confidence: 99%