Universitat Politécnica De Catalunya

Pontificia Universidad Catòlica De Chile

Universita Politecnica De Catalunya

Santiago Royo Royo

Jordi Riu Gras

Vincent Suc

Francisco Javier Azcona Guerro

Jordi Rius Gras

Ajit Jha

A system and method for scanning a surface and a computer program implementing the method. The method is suitable for performing the functions carried out by the system of the invention. The computer program implements the method of the invention. The system

System and method for scanning a surface and computer program implementing the method

A method and system to implement the method of measuring a change in an optical path length using differential laser self-mixing interferometry. The method includes obtaining a reference SMI signal (Sr) and a main measurement SMI signal (Sm) of a laser (LD) and determining the relative change in the optical path length between the (LD) and a target (T) in a range between 0 and &#x3bb;/2, by comparing the relative positions along time of fringes or transitions of the (Sm) and (Sr). The (Sr) and the (Sm) are obtained at different moments once backscattered laser light (br) is generated from the reflection on said target (T) of a reference and a main measurement laser light beam emitted by the laser (LD) and while being modulated according to a specific modulation pattern that maintained while both the (Sr) and the (Sm) are acquired and has re-entered its laser cavity.

Method of measuring a change in an optical path length using differential laser self-mixing interferometry and a differential laser self-mixing interferometry measuring system

The invention relates to a system () for receiving a light beam, comprising an array of light sensors (). The system also comprises a pixelated light switch array (), in which each switch is adapted to receive at least one portion of the light beam and direct it to the array of light sensors (), and the pixelated light switch array () comprises a higher number of switches than the number of light sensors comprised in the array of light sensors ().

System, method and computer program for receiving a light beam

A method and a system are for compensating optical aberrations in a telescope. The method is applicable to a telescope wherein the element for receiving a primary beam is an image acquisition device (), and involves using an algorithm without an image processing sensor for: a) detecting optical aberrations affecting the primary focus, by analyzing the images acquired by the image acquisition device (), and b) calculating and generating first positional correction values, by processing the detected optical aberration values. The method also includes a step c) consisting in moving, in a controlled manner, the image acquisition device (), applying suitable control signals generated from the first positional correction values. The system is suitable for implementing the proposed method.

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