High-Frequency Relief-Phase Holographic Gratings on Dichromated Gelatin Processed by Short-Wave UV Radiation

2019 ◽  
Vol 45 (6) ◽  
pp. 613-615 ◽  
Author(s):  
N. M. Ganzherli ◽  
S. N. Gulyaev ◽  
I. A. Maurer ◽  
D. R. Khazvalieva
Keyword(s):  
Uv Radiation ◽  
High Frequency ◽  
Short Wave ◽  
Holographic Gratings ◽  
Dichromated Gelatin ◽  
Relief Phase

Регистрация высокочастотных рельефно-фазовых голографических структур на фотоматериале ПФГ-04

2021 ◽  
Vol 47 (21) ◽  
pp. 13
Author(s):  
Н.М. Ганжерли ◽  
С.Н. Гуляев ◽  
И.А. Маурер ◽  
А.В. Архипов
Keyword(s):  
Spatial Frequency ◽  
Uv Radiation ◽  
Diffraction Efficiency ◽  
High Frequency ◽  
Short Wave ◽  
Destructive Effect ◽  
Holographic Gratings ◽  
New Variant ◽  
First Time ◽  
Relief Phase

A new variant of processing photographic plates for holography based on dichromed gelatin PFG-04 (produced by JSC "Slavich Company", Pereslavl-Zalessky) for the manufacture of high-frequency relief–phase holographic gratings with a spatial frequency up to 1500 mm-1 is proposed. The technology is based on the selective destructive effect of short-wave UV radiation on gelatin and subsequent etching of the layer with various reagents. For the first time, relief-phase high-frequency holographic gratings with a maximum diffraction efficiency of 67% were obtained on PFG-04 photographic plates.

scholarly journals Высокочастотные рельефно-фазовые голографические решетки на обработанном коротковолновым УФ-излучением бихромированном желатине

2019 ◽  
Vol 45 (12) ◽  
pp. 30
Author(s):  
Н.М. Ганжерли ◽  
С.Н. Гуляев ◽  
И.А. Маурер ◽  
Д.Р. Хазвалиева
Keyword(s):  
Spatial Frequency ◽  
Uv Radiation ◽  
High Spatial Frequency ◽  
Short Wave ◽  
Destructive Effect ◽  
Holographic Gratings ◽  
First Time ◽  
Relief Phase

For the first time, the possibility of creating relief-phase holographic gratings with a high spatial frequency of 1500 mm-1 on dichromate gelatin (DCG) layers using the destructive effect of short-wave UV radiation on gelatin is shown.

scholarly journals Применение термообработки при формировании рельефно-фазовых голографических структур на бихромированном желатине

2020 ◽  
Vol 128 (10) ◽  
pp. 1507
Author(s):  
Н.М. Ганжерли ◽  
С.Н. Гуляев ◽  
И.А. Маурер
Keyword(s):  
High Temperature ◽  
Water Treatment ◽  
Spatial Frequency ◽  
Uv Radiation ◽  
Short Wave ◽  
Coherent Radiation ◽  
Steady Increase ◽  
Spatial Frequencies ◽  
Dichromated Gelatin ◽  
Relief Phase

A new method is proposed for the formation of a relief phase holographic structure on layers of dichromated gelatin (DCG). The method is based on the application of two types of alternative effects on gelatin: structuring using selective light tanning with coherent radiation from a He-Cd laser and destruction by irradiating the layers with short-wave UV radiation. To obtain highly effective holographic relief structures in the region of high spatial frequencies, up to 1500 mm–1, a time-shortened water treatment of samples, interrupted by an isopropanol bath, was previously proposed. In this paper, it is proposed to abandon the water treatment of DCG layers and replace it with heating the sample during irradiation with short-wave UV radiation. In the course of experiments, a steady increase in the diffraction efficiency was obtained regardless of the spatial frequency and thickness of the DCG layer, which is explained by the formation of a relief holographic structure due to evaporation and shrinkage of gelatin areas destroyed by UV radiation under the influence of high temperature.

scholarly journals Investigations of As-S-Se thin films for use as inorganic photoresist for digital image-matrix holography

Open Physics ◽  
2011 ◽  
Vol 9 (5) ◽  
Author(s):  
Andrejs Bulanovs ◽  
Vjacheslavs Gerbreders ◽  
George Kirilovs ◽  
Janis Teteris
Keyword(s):  
Thin Films ◽  
Digital Image ◽  
Diffraction Grating ◽  
Spatial Light Modulator ◽  
Laser Intensity ◽  
Holographic Recording ◽  
Light Modulator ◽  
Frame Size ◽  
Holographic Gratings ◽  
Relief Phase

AbstractAs-S-Se chalcogenide thin films are successfully employed in classical and dot-matrix holography as inorganic photoresists for obtaining a relief-phase hologram. However using these films for image-matrix hologram recording has not been studied due to some features of image-matrix technology. For the applied research of the optical properties of As-S-Se films an experimental device of digital image-matrix holographic recording based on 100 mW 405 nm semi-conductor laser and Spatial Light Modulator (SLM) has been created. The device has the following main parameters: 140 × 105 µm frame size; laser intensity during exposure 10 W/cm2. With the help of this device diffraction grating and security holograms were recorded on As-S-Se thin films. The work reported herein presents results of an experimental study of how diffraction efficiency (DE) of the received relief-phase holographic gratings depends on an exposure and period. Diffraction grating profiles and speed of etching corresponding to different exposure doses are shown. Hologram samples with DE = 65% have been received which allows for using chalcogenide film as alternative to organic photoresists in applied dot-matrix and image-matrix holography.

Effect of rail pad stiffness on the wheel/rail force intensity in a railway slab track with short-wave irregularity

2019 ◽  
Vol 233 (10) ◽  
pp. 1038-1049 ◽  
Author(s):  
Amin Khajehdezfuly
Keyword(s):  
High Frequency ◽  
Critical Speed ◽  
Concrete Slab ◽  
Low Frequency ◽  
Short Wave ◽  
Vehicle Speed ◽  
Frequency Range ◽  
Slab Track ◽  
High Frequency Excitation ◽  
Frequency Excitation

In this paper, a two-dimensional numerical model is developed to investigate the effect of rail pad stiffness on the wheel/rail force in a slab track with harmonic irregularity. The model consists of a vehicle, nonlinear Hertz spring, rail, rail pad, concrete slab, resilient layer, concrete base, and subgrade. The rail is simulated using the Timoshenko beam element for considering the effects of high-frequency excitation produced by short-wave irregularity. The results obtained from the model are compared with those available in the literature and from the field to prove the validity of the model. Through a parametric study, the effect of variations in rail pad stiffness, vehicle speed, and harmonic irregularity on the wheel/rail force is investigated. For the slab track without any irregularity, the wheel/rail force is at maximum when the vehicle speed reaches the critical speed. As the rail pad stiffness increases, the critical speed increases. When the amplitude of irregularity is high, wheel jumping phenomenon may occur. In this situation, as the vehicle speed and rail pad stiffness are increased, the dynamic wheel/rail force is increased. In the low-frequency range, the wheel/rail force increases as the rail pad stiffness increases. In the high-frequency range, the wheel/rail force increases as the rail pad stiffness is decreased.

Design of readout IC for photoelectron detector of short-wave high frequency IRFPA

2013 ◽  
Author(s):  
Pan Wang ◽  
Rui-jun Ding ◽  
Guo-qiang Chen ◽  
Honglei Chen
Keyword(s):  
High Frequency ◽  
Short Wave
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