Multiview 3D display system consisting of mobile phone screen and optical screen consisting of microlens array film is designed. 3D image files are created and images are demonstrated based on different smartphones with high resolution displays.
In this paper the multi-view 3D display system which includes the modules of capturing three-dimensional objects, image processing (creation of 3D image files) and display screen for the 3D image displaying based on integral imaging technology is developed. Large display screens using multi-projectors are created. Multi-projector system is used for improving the performance, such as viewing resolution, viewing angle, etc. Preliminary experimental results obtained using Full HD multi-projectors are discussed. 3D display based on mobile devices is also developed. 3D image files are created using 2D + depth files and 2D images captured at different view angles. Images on smartphones Sony 4K (resolution 3840 x 2160) and Samsung and LG (resolution 2560 x 1440) are demonstrated.
Features of thermal trace forming by thermochemical circular laser writing in chromium films on glass (quartz)
substrates are considered on the basis of thermal equation system solution. Linear (thermal parameters do not
dependence on temperature) and nonlinear (thermal parameters dependence on temperature) models are considered. It is
showed that linear model is enough for thermal trace broads consideration. Calculation of thermal field is provided for
wide range of linear scanning velocities (from 1.2 up to 9.4 m/sec). Dynamics of chromium film heating when laser
beam is switched on is researched. Difference of the thermal trace form in switching on area and switching off area is
showed. Also structures like chess board are synthesized for experimental investigation. Influence of thermal processes
inertness on the broadband image parameters is considered on such samples experimentally. Recommendations for
experimental selection of writing power have been done.
The results of scanning method research for testing of diffraction optical elements are shown in this paper. The diffraction efficiency of a specimen of diffraction optical element (Fresnel lens) was measured by the proposed scanning method and by direct (integral) method. Measured data are compared and analyzed. Results of efficiency measurement of diffraction optical element, that produces non-spherical wavefront transformation, are presented and discussed. The parameters of the fulfilled phase profile for these diffractive optical elements are evaluated.
KEYWORDS: Transmittance, Glasses, Photoresist materials, Quartz, Manufacturing, Global system for mobile communications, Silver, Fresnel lenses, Laser systems engineering, Modulation transfer functions
The perspective opportunity to fabricate gray-scale masks was given LDW-glasses (LDW--Laser Direct Writing) from Canyon Materials, Inc. LDW-glass blanks contain a large number density of coloring specks of silver in a surface glass layer. A focused laser beam is used to heat erase these coloring specks. Experiments on the influence of laser radiation on LDW-glasses was carried out using a circular laser writing system. The transmittance value from the blank of 0.1 - 5% up to 70 - 80% depending on laser beam power is obtained with the current write scheme. Results of research of LDW-glasses behavior in a wide range of laser beam scanning speeds are described. Laser pattern generation in LDW-glass including the spatial resolution is discussed. The technology of fabrication of continuous-phase diffractive elements was tested by making exemplary Fresnel lenses. Total 80% efficiency for quartz Fresnel lenses with minimal zone width of 8 micrometers was readily achieved in the preliminary experiments.
The application of continuous-tone photomasks for fabrication of diffractive optical elements with a deep phase relief is explored. Results of computer simulation for technological process are reported and compared with experiment. The experimental testing of offered technique was carried out on thick AZ4562 photoresist layers. The possibility of deep phase relief fabrication has been proven. The application of the new technique to fabrication of multiorder diffractive elements is discussed.
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