The possibility to reduce the effect of optical aberrations has been proposed in several publications on classical ghost imaging. The two-armed ghost-imaging systems make use of spatially incoherent illumination and point-by-point scanned intensity-correlation measurements in the arms. In this work, we introduce a novel ghostlike imaging method that uses a Mach-Zehnder interferometer and is based on optical-field interference instead of intensity correlations. The method allows us to obtain sharp images of microscopic objects even in the presence of severe aberrations that completely destroy the intensity-based image. Furthermore, pure phase objects can be imaged with micrometer-scale resolution in the presence of strong aberrations, which has not been demonstrated previously with a correlation-based imaging technique. In the setup, we use a light-emitting diode source and an ordinary camera as the only light detector. The imaging approach that we put forward in this work may find significant applications in advanced optical microscopy, optical coherence tomography, and a variety of interferometric sensors and detectors.
The article reviews the influence of cutting rates on macrogeometry deflection of milling complex form products and turning an outside surface. For that purpose, one of the most popular aluminium alloys 6082 has been chosen. A ball nose mill of 8 mm in diameter has been milled employing CNC vertical centre HAAS MINI MILL and applying CNC lathe HAAS ST 20 for turning. Measurements have been carried out using coordinate measuring machine DEA micro-hite DCC, applying the probe sphere of 3mm in diameter and the probe equipped with a needle. A deviation of the surface profile from tangent to therophore parabola has been investigated. The determinants R2 of the obtained regressive equation have disclosed that the depth of the cut has the biggest influence on macrogeometry deflections, whereas feed rate has a slighter influence and cutting speed has no radical influence. For the turning process, the depth of the cut has the strongest influence on circularity while cilindrisity has been mainly affected by cutting speed.
Darbe atlikti tyrimai, kaip pjovimo režimai daro įtaką paviršiaus formai ir jo kokybei frezuojant sudėtingos formos detales ir tekinant išorinį paviršių. Pasirinktas vienas populiariausių aliuminio lydinių 6082. Frezuota vertikalaus apdirbimo CNC centru HAAS MINI MILL, naudota sferinė fasoninė freza, kurios skersmuo 8 mm, tekinta CNC tekinimo staklėmis HAAS ST 20, matavimai atlikti koordinatine matavimo mašina DEA micro-hite DCC, liestuko sferos skersmuo 3 mm, naudotas liestukas su adatėle. Tirtas paviršiaus profilio nukrypimas nuo glaustinės parabolės. Pagal gautus regresinės lygties determinantus R2 paaiškėjo, kad didžiausią įtaką profilio nuokrypiams turi pjovimo gylis, mažesnę įtaką turi pastūma, pjovimo greitis esminės įtakos neturi. Tekinant, apskritumui labiausiai įtaką darė pjovimo gylis, o cilindriškumui – pjovimo greitis.
Santrauka. Ciklonai naudojami dalelėms iš užteršto oro pašalinti. Šiame darbe buvo tirtas kietųjų dalelių poveikis vidinei ciklono sienelei. Suprojektuotas stendas, kuriame buvo galima keisti ciklono įdėklą, variklio sūkių dažnį ir abrazyvines medžiagas. Įdėklai pagaminti iš plieno, nerūdijančiojo plieno ir poliuretano. Kaip abrazyvinės medžiagos naudotas kvarcinis smėlis, stiklo rutuliukai, plieno rutuliukai ir korundas. Nustatyta, kad didžiausią poveikį sienelei daro plieno rutuliukai, kai variklio sūkių dažnis yra 2400 sūk./min, atspariausia dilimui medžiaga buvo nerūdijantysis plienas.Reikšminiai žodžiai: abrazyvinės medžiagos, ciklonas, išdilimas, kietosios dalelės, nerūdijantysis plienas.
There were used the spherical lenses in industry conventional for long time, but new types of lenses were created during innovation processes. One type of lenses is aspherical. Two main parameters describing quality of aspherical lenses are accuracy of the form shape and surface roughness. These parameters can be obtained after last operation – polishing. Technical parameters that give the biggest influence to form shape and surface roughness were investigated in this experiment and optimal technical parameters for polishing process were established. Melted quartz ,,UVFS” was used in this research, investigations were carried out according by full factorial design. Five axis CNC machine Schneider SCPA100 was used for polishing and profilometer Nanoscan 855 was used for measurements. After analysis of results it was found out that speed of rotation and penetration depth are the most important factors in polishing process. For getting the best shape it’s necessary to use the smallest chosen values of speed of rotation and penetration depth, for getting the best surface roughness polishing parameters changing conversely. The smallest value of surface roughness Rz was 0.06 µm, and shape deviation was 2.6 µm. Optimal polishing parameters for the best quality of aspherical lenses was provided.
Santrauka. Straipsnyje išnagrinėta skirtingais griovėtais diskais nuo vandens paviršiaus surenkamo skysčio ir jame esančio vandens kiekio priklausomybė nuo griovėto disko sukimosi greičio ir polinkio kampo. Buvo suprojektuotas stendas su galimybėmis pakeisti diską, disko sukimosi greičius bei polinkio kampą. Naudotų diskų griovelių geometrija V ir U formos. Nuo vandens paviršiaus disku buvo renkamas maistinis aliejus ir tepalai 80W90 į sugraduotą kolbą. Atlikus gautų rezultatų analizę, nustatytas optimalus disko sukimosi greitis, kuris lygus 15 aps/min, o polinkio kampas lygus 0°.Reikšminiai žodžiai: diskas, griovelio forma, naftos produktai, posvyrio kampas, surinkimas.
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