Basis and Constraints of the Development of Optoelectronic Systems (1)
Since the development of optoelectronic systems in the early 20th century, especially in the past 40 years, the performance and application range of optoelectronic systems
And the use effect has been greatly developed.
(1) The performance of the photoelectric system is closely related to the development of photodetectors. With the continuous increase of
The performance of the detector has also continuously put forward various new requirements, mainly in the aspects of a working band, responsivity, working frequency, sensitive area and structural technology, thus promoting the development of photodetectors. On the other hand, the emergence of new detectors has opened up new ways for the development of optoelectronic systems. At present, from near-ultraviolet to far-infrared, there are photodetectors with high-performance indicators. The performance of 14~40μm far-infrared photodetectors is constantly improving, and the types of applicable devices are increasing. Comprehensive utilization of the achievements of modern detectors to improve application effects is one of the important directions for the development of optoelectronic systems.
(2) The photoelectric system is inseparable from various types of optical systems. Therefore, geometric optics and physical optics are also the theoretical basis of its system design. In the performance analysis and calculation of optoelectronic systems, the method of the optical transfer function is commonly used to analyze and evaluate the quality of the system, and the method of the optical transfer function is also commonly used for the design of the whole system. The development of optical materials and various optical components, especially those suitable for ultraviolet and infrared bands, and the corresponding optical components, and optical processes are also important foundations for the development of optoelectronic systems. At present, the processing technology of aspheric surfaces and arbitrary space curved surfaces has been mature; the vacuum coating technology and special technology also have a high level. The advances in the above technologies have established the necessary foundation for the development of optoelectronic systems.
(3) From the information point of view, the information photoelectric system is essentially an information receiving system. In the research of information optoelectronic systems, we should first consider the problem of signal detection (signal detection theory is an important branch of information theory). In optoelectronic systems, we must study the problems of signal formation, detection criteria, detection methods, and estimation. The detected signal undergoes necessary forms of processing to suppress noise to obtain the required target information. Modern signal processing technology has two methods: analog and digital. Filtering technology, related technology, image processing technology, and various background suppression technologies have been widely used in the design of information optoelectronic systems. Information photoelectric system is usually also a control system. The development of modern control theory and technology also provides an important foundation for the application of photoelectric systems.
To be continued...