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Article
Experimental Study of Optical Characteristics of an Acousto-Optic Filter in a Wavelength Interval of 450–1700 nm
An acousto-optic (AO) tunable filter based on a paratellurite (TeO2) crystal with two piezoelectric transducers that provides arbitrary spectral addressing in a wavelength interval of 450–1700 nm is developed. Th...
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Article
Study of the Ultrasonic Field in an Acousto-Optic Crystal Using Acoustic Methods
Two methods are presented to estimate the structure of the acoustic field generated in the working medium of an acousto-optic (AO) modulator by its ultrasonic emitter. The first method employs an acoustic micr...
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Article
Adaptive X-Ray Optical Elements Based on Bending Piezoactuators: Possibilities and Prospects of Practical Application
The possibilities of a new class of adaptive X-ray optical elements based on bending piezoelectric actuators for practical implementation of time-resolved experiments using X rays and synchrotron radiation—fas...
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Article
Edge Detection in Hyperspectral Images
Main approaches to object edge detection in hyperspectral images are considered. Algorithms are presented for the edge detection in spectral–selective objects based on spatial–spectral correlation and interspe...
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Article
Optical Design of a Holographic Unit Based on a Two-Lens Common-Path Interferometer
The problem of fabrication of compact units for digital holography that are compatible with optical microscopes and the features and advantages of a two-component lens-in-lens interferometer in such units are ...
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Article
Analysis of Dynamic Processes in Biological Systems Using Acousto-Optic Video Spectrometry
A measurement setup based on a transmission microscope with double acousto-optical wavelength selection is proposed for detection of high-quality spectral images with a size of 1920 × 1200 pixels in the visibl...
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Article
Tunable Acousto-Optic Filter for the 450–900 and 900–1700 nm Spectral Range
The problem of creating an acousto-optic (AO) tunable filter, which allows us to obtain high-quality spectral images both in the visible and near-infrared ranges, is studied. Based on the analysis of the wide-...
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Article
Blood Vessel Visualization Method in Human Skin Based on Video Recording of Blood Flow Using a Laparoscope
The possibility of increasing the reliability of early diagnoses of diseases associated with a lesion of the capillary network morphology in human skin is considered. A method for visualizing the capillary net...
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Article
Reinforcing of a Mirror Surface via the Deposition of a Carbon Nanostructure
The problem of reinforcing the mirror surfaces of space-based astronomical optics and their protection against external factors is discussed. To solve this problem, the possibility of the deposition of diamond...
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Article
An Acousto-Optic Hyperspectral Unit for Histological Study of Microscopic Objects
The problem of the development of an adjustable video-spectrometer unit based on an acousto-optic tunable filter has been considered. This unit is embedded into an optical system of microscopes for hyperspectr...
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Article
An Acousto-Optic Endoscopic Module for Nondestructive Testing
The problem of recording of spectral images and identifying the reflection spectra of hard-to-reach objects is considered. To solve this problem, an acousto-optic spectral imaging module compatible with conven...
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Article
Applying a ray tracing model of an optoelectronic system to improve the accuracy of endoscopic measurements
The problem of improving the accuracy and extending the range of geometrical measurements taken by video endoscopes equipped with attachable stereo adapter has been considered. For calibration and measurements...
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Article
An imaging spectroradiometry system for measuring spatial temperature distributions in microscopic objects
An imaging-spectrometry method for measuring the spatial distributions of the temperature of microscopic objects with nonuniform spectral-emissivity distributions over their surfaces is described. An acousto-o...
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Article
Determining the aberration characteristics of optical systems containing acousto-optical diffraction elements
We describe a method and present an example of the calculation of aberration images that arise in optical systems (OSs) containing acousto-optical (AO) diffraction elements. The method is based on the integrat...
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Article
Visualization of the phase structure of optically transparent objects on the basis of acousto-optical filtration of interference images
To detect and quantitatively evaluate the heterogeneity of an optically transparent object, a visualization method on the basis of the spectral-domain optical coherence tomography scheme was developed. In cont...
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Article
Spatial and spectral calibration of an acousto-optical spectrometer
The problem of determining the optical spectra at separate points of images that are recorded with an endoscopic acousto-optical spectrometer is considered. The factors that cause distortions in images and spe...
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Article
Spectral holographic imaging of transparent objects in Mach−Zehnder interferometer using acousto-optic filter
The problem of digital holographic imaging of optically transparent objects in arbitrary spectral intervals is discussed. An optical scheme based on Mach−Zehnder interferometer with acousto-optic filtration of...
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Article
An instrument for simultaneous visual and thermal testing of microelectronic devices
The problem of simultaneous visual and thermal testing of microobjects is considered. For this purpose, a mirror–lens optical system is proposed and constructed. The system has no movable elements and provides...
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Article
Recording digital holograms of optically transparent objects in arbitrary spectral intervals based on acousto-optic filtration of radiation
The problem of obtaining digital holographic images of optically transparent objects in arbitrary spectral intervals is considered. A Mach–Zehnder interferometer based optical scheme with acousto-optic spectra...
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Article
A multifunctional contactless profilometer based on a tunable acousto-optical image filter
A contactless complete-field profilometer operating as an optical coherent microscope with the spectral recording is designed. Its special feature is that the spectral selection is carried out in the receiving...
