The relevant scientific and technical problem is defined and solved in dissertation: the improvement of the performance characteristics of optical elements in optoelectronic devices based on established patterns of exposure modes of electron-beam technology, mathematical models, specialized software that represent the technological bases of management of quality characteristics of surfaces and surface layers.
The modern level of development of opto-electronic instrument building brings increased requirements to the performance of their optical elements: microhardness of the surface; the strength of the surface layers; spectral transmission factor; resistance to external thermal and mechanical shocks, etc., that affect the technical and performance characteristics of the devices.
As practice has shown, the most comfortable, environmentally friendly and handy way of handling optical elements is electron-beam method, which allows you with a help of a moving electron beam by buffing items from optical glass to get the surface of high purity with minimal surface roughness, non-failed surface layers, as well as to strengthen elements from optical ceramics and to get the surfaces with high microhardness and thickness of strengthened layers of tens of microns. However, the widespread use of electron beam technologies in optical-electronic instrument manufacture is hindered by the lack of data on the patterns of exposure modes of electron beam treatment on the performance characteristics of optical elements, the control of which allows you to improve the technical and performance characteristics of the devices.
During the operation of optical elements in conditions of thermal and mechanical shocks, there is a great practical importance of predefined critical values of the parameters of external and places of location of danger zones on the surface of the elements that are exposed to the maximum stresses and that need to be processed in advance by electron beam to prevent deterioration of their operational characteristics and damage of items.
For the first time modes of electron-beam technology are established, within which there is an improvement of optical elements performance. For the first time the regularities of influence of modes of electron-beam technology for the spectral transmittance coefficient are established, which leads to increased accuracy and range expansion measurement of devices. For the first time the regularities of influence of modes of electron-beam technology for the surface microhardness are established, as well as the resistance to external influences, that allows to increase the probability of non-failure operation of devices in operation.
A new method of processing of complex curved surfaces is worked out as well as creating on them functional microprofiles of different geometric shapes using fixed discretely located electronic beams, allowing to create microoptical details for opto-electronic devices by optimum control of technological parameters of the installation. The refined mathematical models of external heating of the optical elements of different geometric shapes and sizes are developed, that take into account the temperature dependences of thermal properties of optical material, which allows determining critical values of external heat flows and time of their influence, preventing their destruction. A new mathematical model of thermal shock external influences on optical semispherical fairing under the conditions of operation of supersonic equipment is developed, allowing to determine the critical values of flow speeds by airflow, time of its influence, location place on the surface of the fairing dangerous zones that are exposed to the maximum thermal influence and that need to be additionally processed by electronic beam at the stage of production, preventing their destruction during operation. New methods developed to improve the technical and operational characteristics of opto-electronic devices by means of improving the performance of their optical elements using electron-beam technology.
The results of dissertation constitute the scientific basis for the design, technical realization and implementation on production of technology of electron beam treatment of optical elements of opto-electronic devices to improve their operational characteristics. The results of theoretical and experimental research, as well as developed methods have found practical use and implementation (confirmed by acts of implementation) on the enterprises of Ukraine and the Republic of Belarus, that made possible: to improve the accuracy and expand the ranges of measurement of distance of pulse laser range finders at 7…15%; to increase the probability of non-failure operation of optical fairings of IR devices and fiber-optic beam guides of laser medical devices in operation at 10…20%; get economic benefit of 360 thousand hryvnias.
