NPO State Institute of Applied Optics

Kazan, Russia

NPO State Institute of Applied Optics

Kazan, Russia

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Belokopytov A.A.,NPO State Institute of Applied Optics | Shakirov N.F.,NPO Setal
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2010

A spectrograph intended foranalyzing metals, alloys, rocks, and soils has been developed. The optical layout of the spectrograph is based on a concave holographic diffraction grating, recorded in nonhomocentric beams and mounted on a Rowland circle. This paper presents the results of a calculation of the optical layout of the spectrograph and of the aberrational characteristics of concave holographic diffraction gratings, a holographic apparatus on which a second-generation grating is recorded, and samples of spectra obtained on a prototype of the spectrograph. © 2010 Optical Society of America.


Larionov N.P.,NPO State Institute of Applied Optics | Lukin A.V.,NPO State Institute of Applied Optics
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2010

This paper describes a technique for monitoring off-axis aspheric mirrors. The question of measuring the distance from the center of the reflective surfaces of off-axis aspheric mirrors to the optical axes of the corresponding axisymmetric aspheric surfaces of revolution is considered in detail. The monitoring device consists of a Twyman-Green interferometer and a linear-displacement meter. The working branch of the interferometer contains a synthesized holographic optical element consisting of three coaxial axial synthesized holograms, produced on the common working surface of the substrate; the linear-displacement meter contains a viewing microscope. This technique can be used when monitoring off-axis aspheric mirrors with either concave and convex reflective surfaces for various optical systems, as well as aspheric segments of optical-telescope mirrors, including mirrors whose positioning is being monitored. © 2010 Optical Society of America.


Dorofeeva M.V.,NPO State Institute of Applied Optics
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2010

This paper discusses the operation of a right-angle scanning prism mounted inside a spherical cowl. It is shown that the parameters and the relative placement of the prism and the cowl affect the image quality of the optical system in the process of scanning the viewing zone. © 2010 Optical Society of America.


Ovsyannikov V.A.,NPO State Institute of Applied Optics | Filippov V.L.,NPO State Institute of Applied Optics
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2012

This paper proposes an improved technique for calculating the probability of the detection and recognition of objects of the terrain lying beyond aerosol formations by means of modern high-sensitivity thermal viewers, taking into account the specific features of the thermal viewers, as well as the transparency and emission of these formations and the atmosphere and using an improved model of the operator-interpreter's visual analyzer. A corresponding criterion is formulated for the detection or recognition of such objects by means of a thermal viewer. © 2012 Optical Society of America.


Tiranov A.D.,NPO State Institute of Applied Optics | Filippov V.L.,NPO State Institute of Applied Optics
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2012

This paper proposes a model for calculating the characteristics of the radiation of solid-fuel rocket engines (SFREs). The plume of an SFRE is regarded as a gas-dynamic system in which the characteristics of the rocket flight and the distribution profiles of the speed, density, and temperature are linked with the parameters of the gas at the engine's nozzle section. A basis is provided for the assumptions that have been made to simplify the computational procedure for the plume in its various projections. Calculations of the spatial brightness distributions of the plumes under various conditions showed that the model is adequate when compared with the experimental data. © 2012 Optical Society of America.


Kuks V.G.,NPO State Institute of Applied Optics
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2012

This article briefly describes the results of the development and use at NPO GIPO of a full-size tool with an aspheric working surface for grinding. Aspherization is carried out with free abrasive on domestically produced Planeta machines, developed in the 1970s-80s by specialists at NPO GIPO and the Minsk Mechanical Factory and fabricated in Smorgon' (Belarus). © 2012 Optical Society of America.


Demin A.D.,NPO State Institute of Applied Optics | Chugunov Yu.P.,NPO State Institute of Applied Optics
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2012

The intensities and wavelengths of the spectral lines of line spectra have been measured with a spectral device having multielement linear photodetectors with various widths of the photosensitive element. It is shown that the measurement error decreases for a definite relationship of the width of the photosensitive element and the half-width of the spread function of the spectral device. © 2012 Optical Society of America.


Lukin A.V.,NPO State Institute of Applied Optics
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2012

This paper demonstrates how the degree of temporal coherence of the radiation of gas-discharge and semiconductor lasers depends on the discharge current (the pump current) and diffraction losses. Experimental results obtained by means of a Fabry-Perot etalon and an equal-arm Michelson interferometer with a diffraction grating are presented. © 2012 Optical Society of America.


Gabrakhmanov T.R.,NPO State Institute of Applied Optics | Yatsyk V.S.,NPO State Institute of Applied Optics
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2012

This paper discusses the features of using optoelectronic circular-scan systems with array-type photodetectors. A technique is developed for estimating the range of action of such systems, taking into account the time-varying radiation intensity of an object. The optimum scanning period of the systems and the optimum exposure time of the photodetector array are determined, using the criterion of the maximum range of detection of an object in minimum time. © 2012 Optical Society of America.


Kulakova N.A.,NPO State Institute of Applied Optics | Nasyrov A.R.,NPO State Institute of Applied Optics | Nesmelova I.M.,NPO State Institute of Applied Optics
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2010

This review presents current methods of creating optical systems for the IR region. Systems are considered that are based on classical materials (germanium and silicon), hybrid systems that use semiconductor ceramics and chalcogenide glasses, and systems with diffraction and gradient elements. Special attention is paid to obtaining optical structures based on polymers. © 2010 Optical Society of America.

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