No (543)
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543
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Technical solution for modernization of 2m telescope
Pintr, Pavel
2019 - Czech
Description of technical solution for renovation of 2 m telescope in Ondřejov. Popis technického řešení modernizace 2 m dalekohledu v Ondřejově.
Keywords:
2 m telescope; Ondřejov; astronomy; modernization
Available on request at various institutes of the ASCR
Technical solution for modernization of 2m telescope
Description of technical solution for renovation of 2 m telescope in Ondřejov.
Charting the development direction for optical path analysis
Pintr, Pavel
2019 - Czech
The research report includes lens selection for high-resolution stereoscopic imaging, glass defect overview, and viewing window market research. Výzkumná zpráva obsahuje výběr objektivů pro stereoskopické snímání ve vysokém rozlišení, přehled vad skel a průzkum trhu průhledového okénka.
Keywords:
stereoscopic imaging; glass; window
Available at various institutes of the ASCR
Charting the development direction for optical path analysis
The research report includes lens selection for high-resolution stereoscopic imaging, glass defect overview, and viewing window market research.
Several Optical Designs of Off-Axis systems
Rail, Zdeněk; Franců, Helena; Ulrichová, Iva; Šípová, Gabriela; Vápenka, David; Vávra, Emil
2019 - Czech
This paper introduces several types of optimized off-axis mirror systems. Systems without central shading and color defects provide high-contrast imaging. They are suitable for use as astronomical telescopes or as precision laboratory collimators of parallel light beams. Many of these devices have been designed and constructed for various purposes in the Development Optical Workshop of the Academy of Sciences of the Czech Republic. Tento referát seznamuje čtenáře s několika typy optimalizovaných mimoosových zrcadlových soustav. Soustavy bez centrálního stínění a barevné vady poskytují zobrazení\ns vysokým kontrastem obrazu. Jsou vhodné pro využití jako dalekohledy pro astronomická pozorování nebo jako přesné laboratorní kolimátory paralelních svazků světla. Řada těchto přístrojů byla navržena a zkonstruována pro nejrůznější účely ve Vývojové optické dílně AVČR, dnes ÚFP AV ČR v.v.i.- Centru Toptec v Turnově.Tato práce seznamuje čtenáře s několika z nich.
Keywords:
Off-axis optical system; astigmatism; spherochromatic aberration; coma; field curvature
Available at various institutes of the ASCR
Several Optical Designs of Off-Axis systems
This paper introduces several types of optimized off-axis mirror systems. Systems without central shading and color defects provide high-contrast imaging. They are suitable for use as astronomical ...
The Residual Optical Aberrations of the Merz Objective Lens 108/1620 mm
Rail, Zdeněk; Melich, Zbyněk; Vápenka, David; Šrajer, Bohdan
2019 - Czech
During the cleaning and adjustment of the Merz lens with a diameter of 108 mm and a focal length of 1620 mm, we had the opportunity to measure its optical parameters. From the measured values we made a calculation of residual optical defects of this achromatic lens. The results of these mathematical simulations are presented in this paper. The lens was made around 1923. Během čištění a seřizování Merzova objektivu o průměru 108 mm a ohniskové vzdálenosti 1620 mm jsme měli příležitost proměřit jeho optické parametry. Z naměřených hodnot jsme provedli výpočet zbytkových optických vad tohoto achromatického objektivu. Výsledky těchto matematických simulací přinášíme v tomto referátu. Objektiv byl vyroben okolo roku 1923.
Keywords:
Achromatic dublet; aplanat; spherochromatic aberration; coma
Available at various institutes of the ASCR
The Residual Optical Aberrations of the Merz Objective Lens 108/1620 mm
During the cleaning and adjustment of the Merz lens with a diameter of 108 mm and a focal length of 1620 mm, we had the opportunity to measure its optical parameters. From the measured values we made ...
Stability of an optical monitor for deposition of 42-layer interference bandpass filter 520-590 nm
Žídek, Karel
2018 - Czech
We report on stability of a deposition process of a complex system of thin layers. The layers were designed as a 42-layer bandpass interference filter. The layers of TiO2 and SiO2 were monitored both by the means of a crystal and an optical thickness monitor. We discuss the case when the design of the interference filter is continuously adapted according to the real thickness of the already deposited layers. V této zprávě popisujeme stabilitu depozice komplikovaných soustav tenkých vrstev, které byly navrženy jako interferenční filtr s pásmovou propustností. Jde o 42 vrstev TiO2 a SiO2, které jsou monitorovány jednak tzv. krystalovým a optickým monitorem tloušťky. Diskutujeme případ, kdy je návrh IF průběžně upravován podle reálné tloušťky deponovaných vrstev.
Keywords:
thin layer deposition; thickness monitor; interference filter; deposition stability
Available at various institutes of the ASCR
Stability of an optical monitor for deposition of 42-layer interference bandpass filter 520-590 nm
We report on stability of a deposition process of a complex system of thin layers. The layers were designed as a 42-layer bandpass interference filter. The layers of TiO2 and SiO2 were monitored both ...
Technical manual - collimator
Kredba, Jan; Steiger, Lukáš; Tomka, David; Václavík, Jan
2018 - English
The purpose of this document is to provide basic set of rules and instructions that allows using and maintaining of the NEOSTED collimator (COL).\nBe aware that it is not purpose of this document to provide detailed description of individual parts of the COL system. If necessary all the details and proper references can be found in [AD-2].
Keywords:
collimator; NEOSTED; TOPTEC; optical testing; interferometry
Available at various institutes of the ASCR
Technical manual - collimator
The purpose of this document is to provide basic set of rules and instructions that allows using and maintaining of the NEOSTED collimator (COL).\nBe aware that it is not purpose of this document to ...
Research report Project Midfree 2. phase
Beneš, Jiří; Karabyn, Vasyl; Matoušek, Ondřej; Špína, Michal
2018 - Czech
Research report describing the creation of an engineering model to predict possibilities of suppressing problematic surface structures. Výzkumná zpráva popisující tvorbu inženýrského modelu k predikci možností potlačení problematických povrchových struktur.
Keywords:
vibration analysis; MSF simulation
Available at various institutes of the ASCR
Research report Project Midfree 2. phase
Research report describing the creation of an engineering model to predict possibilities of suppressing problematic surface structures.
Realization of thin films for final optical components
Budasz, Jiří
2018 - Czech
The report describes the realisation of the thin films coatings at the optical elements used for prototyping. It involves the testing of the coatings at sample substrates as well. Zpráva se zabývá realizací tenkých vrstev na optických elementech určených pro funkční vzorky a prototypy. Popisuje rovněž zátěžové testování soustav vrstev na vzorcích.
Keywords:
High reflective coatings; testing; laser
Available at various institutes of the ASCR
Realization of thin films for final optical components
The report describes the realisation of the thin films coatings at the optical elements used for prototyping. It involves the testing of the coatings at sample substrates as well.
Effect of sintering temperature on microstructure and mechanical properties of AE42 magnesium alloy prepared by spark plasma sintering
Minárik, P.; Lukáč, František; Cinert, Jakub; Šašek, S.; Král, R.
2018 - English
Magnesium alloy AE42 was prepared by powder metallurgy technique of spark plasma sintering. The effect of sintering parameters, particularly sintering temperature, on the microstructure and mechanical strength was investigated. The gas-atomized powder was sintered at four temperatures in the temperature range of 400-550 °C. It was found that mechanical strength of the sintered samples was significantly affected by several microstructural features. Application of relatively high load during sintering caused deformation of the individual particles and consequent recrystallization depending on the processing temperature resulted in the release of internal strain and in grain growth. As a result, the evolution of the mechanical strength as a function of the sintering temperature was significantly affected by residual stress, grain size and coarsening of secondary phase particles.
Keywords:
Magnesium; Mechanical properties; Microstructure; Spark plasma sintering
Available at various institutes of the ASCR
Effect of sintering temperature on microstructure and mechanical properties of AE42 magnesium alloy prepared by spark plasma sintering
Magnesium alloy AE42 was prepared by powder metallurgy technique of spark plasma sintering. The effect of sintering parameters, particularly sintering temperature, on the microstructure and mechanical ...
Collimator - test readiness review
Budasz, Jiří; Kaván, František; Kredba, Jan; Lédl, Vít; Mach, Marek; Pleštil, Jan; Psota, Pavel; Steiger, Lukáš; Tomka, David; Václavík, Jan; Veselý, Martin
2018 - English
This document describes the test procedure applicable to the overall functional test of the NEOSTED collimator.\nThe test to be performed according to this procedure are to demonstrate the compliance of the above item to the requirements specified in the applicable document as part of the overall verification program. The test results shall be collected in a Test Report.
Keywords:
collimator; PLC system; telescope; interferometry
Available at various institutes of the ASCR
Collimator - test readiness review
This document describes the test procedure applicable to the overall functional test of the NEOSTED collimator.\nThe test to be performed according to this procedure are to demonstrate the compliance ...
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