One of the problems of modern science, including medicine, it to visualize small objects and project the image on a large screen. In conventional systems, to provide sufficient illumination of the screen, it is necessary to illuminate the object with a beam of high power, which may be unacceptable. When using active optical systems with brightness amplifier, it is possible to reduce the level of illumination at the object by 2-5 times. Recently, optical systems that are able to visualize fast-flowing processes, including processes shielded from the observer by a layer of brightly luminous plasma, are becoming more and more popular. Such processes occur in the interaction zone of powerful energy fluxes (laser radiation, electron beam, etc.) with matter, for example, in the creation of nanoscale structures, laser processing of materials, self-propagating high-temperature synthesis. To observe such processes it is expedient to use high-speed active optical systems – laser monitors.
The aim of the topic is to get acquainted with the principle of operation of active optical systems with brightness amplification, main parameters of such a laser system, advantages and difficulties of realization of such an optical system.
Look at the scheme of laser monitor and answer the questions below.
Which component of thу scheme is responsible for magnification of the image?
What is the purpose of gray filter?
What are the wavelengths of lasing of CuBr brightness amplifier?
What type of pumping is used for inversion formation in metal vapor brightness amplifiers?
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