scholarly journals RESEARCH OF OPTOELECTRONIC SYSTEMS ON THE BASIS OF A TELESCOPE WITH A LIGHT FIELD DIGITAL CAMERA

2020 ◽  
pp. 4-13
Author(s):  
V. E. Makhov ◽  
V. V. Shirobokov ◽  
A. V. Emelyanov ◽  
A. I. Potapov
Keyword(s):  
High Precision ◽  
Optical System ◽  
Light Field ◽  
Digital Camera ◽  
Scale Model ◽  
Optical Scheme ◽  
Optoelectronic System ◽  
Fundamental Possibility ◽  
Two Component ◽  
Optoelectronic Systems

Within the framework of solving the problems of developing intelligent optoelectronic systems for monitoring remote objects, the possibilities of constructing schemes for registering remote objects with a telescopic system based on a light field digital camera are considered. A technique for calculating a two-component optical scheme for registering distant objects by an optoelectronic system based on a digital camera of a light field is presented, and a layout of an experimental setup for registering a scale model of an object with a two-component optical system consisting of a main mirror of a Newtonian telescope and a digital camera of a light field is presented. The principles of constructing algorithms for determining the main parameters of controlled objects and high-precision calibration of the optical system of the recorder have been developed. The fundamental possibility of constructing a light field correlator on the basis of a telescope is shown. An example of processing a light field file is given. The possibility of high-precision determination of the parameters of remote objects has been investigated.

CONSTRUCTION OF OPTICAL CONTROL ALGORITHMS FOR SMALL-SIZE DISTANT LIGHT OBJECTS

2021 ◽  
pp. 15-27
Author(s):  
V. E. Makhov ◽  
A. I. Potapov ◽  
V. V. Shirobokov ◽  
A. V. Emel'yanov
Keyword(s):  
Light Field ◽  
Digital Camera ◽  
Digital Cameras ◽  
Optoelectronic System ◽  
Advantages And Disadvantages ◽  
Experimental Stand ◽  
Telescopic System ◽  
Characteristic Features ◽  
Principal Possibility ◽  
Distant Light

A mathematical model of the brightness structure of an ensemble of small-sized distant light objects in the plane of a photodetector is presented. The structure and principles of construction of optoelectronic systems for registration of distant and small-sized light objects are considered. A method for constructing of algorithms for determining the parameters of an ensemble of objects of different distances, obtained by an optoelectronic system with a digital camera of the light field, taking into account its characteristic features, is developed. A special experimental stand for the study of objects in distant conditions based on a telescopic system and a digital registrator is presented. The principal possibility of creating a light field correlator is shown. A number of algorithms and functions are described, as well as their capabilities to accurately measure the coordinates and parameters of small-sized light objects. The advantages and disadvantages of algorithms based on the continuous wavelet transform are investigated. A comparative analysis of the accuracy of determining the coordinates, dimensions, and features of small-sized objects by various algorithms is presented. It is shown, that the accuracy of determining the coordinates and parameters of small-sized remote objects by digital cameras of the light field is several times higher than by traditional digital cameras.

scholarly journals Optical Inspection Systems for Axisymmetric Parts with Spatial 2D Resolution

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1218
Author(s):  
Aleksandr Kulchitskiy
Keyword(s):  
Control System ◽  
Optical System ◽  
Measurement Accuracy ◽  
Experimental Studies ◽  
Digital Camera ◽  
Digital Cameras ◽  
Bodies Of Revolution ◽  
Optical Inspection ◽  
Inspection Systems ◽  
Projection Error

The article proposes a solution to the problem of increasing the accuracy of determining the main shaping dimensions of axisymmetric parts through a control system that implements the optical method of spatial resolution. The influence of the projection error of a passive optical system for controlling the geometric parameters of bodies of revolution from the image of its sections, obtained by a digital camera with non-telecentric optics, on the measurement accuracy is shown. Analytical dependencies are derived that describe the features of the transmission of measuring information of a system with non-telecentric optics in order to estimate the projection error. On the basis of the obtained dependences, a method for compensating the projection error of the systems for controlling the geometry of the main shaping surfaces of bodies of revolution has been developed, which makes it possible to increase the accuracy of determining dimensions when using digital cameras with a resolution of 5 megapixels or more, equipped with short-focus lenses. The possibility of implementing the proposed technique is confirmed by the results of experimental studies.

A novel optical system design of light field camera

2017 ◽  
Author(s):  
Ye Wang ◽  
Wenhua Li ◽  
Chenyang Hao
Keyword(s):  
System Design ◽  
Optical System ◽  
Light Field ◽  
Optical System Design

scholarly journals Chemically Fueled Self-sorted Hydrogels

2021 ◽  
Author(s):  
Nishant Singh ◽  
Álvaro Lopéz-Acosta ◽  
Georges Formon ◽  
Thomas Hermans
Keyword(s):  
Mechanical Properties ◽  
High Precision ◽  
Supramolecular Assemblies ◽  
Gelation Kinetics ◽  
Two Component

Narcissistic self-sorting in supramolecular assemblies can help to construct materials with more complex hierarchies. Whereas controlled changes in pH or temperature have been used to this extent for two-component self-sorted gels, here we show that a chemically fueled approach can provide three-component materials with high precision. The latter materials have interesting mechanical properties, such as enhanced or suppressed stiffness, and intricate multi-step gelation kinetics. In addition, we show that we can achieve supramolecular templating, where pre-existing supramolecular fibers first act as a templates for growth of a second gelator, after which they can selectively be removed.

Fast and high precision alignment of off-axis reflective optical system

2021 ◽  
Author(s):  
Chunyu Wang ◽  
Cong Wang ◽  
Jinchuan Niu ◽  
Yinglong Zhao ◽  
Shengjie Zhang ◽  
...  
Keyword(s):  
High Precision ◽  
Optical System

Optical System Design of LCOS-Based and High Precision Dynamic Star Simulator

2014 ◽  
Vol 41 (7) ◽  
pp. 0716003
Author(s):  
陈启梦 Chen Qimeng ◽  
张国玉 Zhang Guoyu ◽  
孙向阳 Sun Xiangyang ◽  
王国名 Wang Guoming ◽  
王哲 Wang Zhe
Keyword(s):  
System Design ◽  
High Precision ◽  
Optical System ◽  
Optical System Design

Optical System Design of High-Precision Static Star Simulator with Large Field of View

2014 ◽  
Vol 51 (5) ◽  
pp. 052202
Author(s):  
陈启梦 Chen Qimeng ◽  
张国玉 Zhang Guoyu ◽  
王哲 Wang Zhe ◽  
张健 Zhang Jian
Keyword(s):  
System Design ◽  
High Precision ◽  
Optical System ◽  
Field Of View ◽  
Large Field ◽  
Optical System Design

Design of the Novel Calibration Platform for Piezoelectric Dynamometers

2012 ◽  
Vol 580 ◽  
pp. 3-6
Author(s):  
Chang Yin Gao ◽  
Wan Quan Li
Keyword(s):  
High Precision ◽  
Force Sensor ◽  
Vertical Force ◽  
The Novel ◽  
Calibration Standard ◽  
Static Calibration ◽  
High Rigidity ◽  
Two Component ◽  
Torque Load ◽  
Component Force

In order to accomplish the static calibration of piezoelectric dynamometer, the principle and structure of a multifunctional high-precision, high rigidity static calibration platform is manufactured in this paper. The screw loading mechanisms are used to achieve vertical force and horizontal forces, and its value can directly obtained by the standard measuring ring. The torque load adopts “force × lever arm" law, that is, the two horizontal loading mechanisms are relatively shifted to form force arm, and at the same time two parallel forces that have the same magnitude and opposite directions are generated. After accuracy and rigidity experiments, the static calibration platform has reached the calibration standard stipulated by CIRP-STCC. Undoubtedly, the calibration platform can use to calibrate unidirectional force, two component force sensor, three-component piezoelectric dynamometer and the drilling dynamometer, such as sensitivity, linearity, repeatability, hysteresis and crosstalk.

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