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	The Construction of the Spectroscope for Observation of the Stellar Spectra Rail, Zdeněk ; Jareš, Daniel ; Pintr, Pavel ; Vápenka, David This paper presents the construction list of a spectroscope for visual observation of stellar spectra. The device consists of parts easily accessible on market. Assembly of the spectroscope does not require exceptionally equipped workshop and can be made in very spartan conditions. Detailed record
	The Coma Corrector of D.M.Maksutov Rail, Zdeněk ; Jareš, Daniel ; Vápenka, David The simpliest coma corrector of the paraboloidal mirror is a singlet-meniscus of Maksutov. This corrector placed into converging beam of a paraboloidal mirror corrects coma and saves stigmatic image of the system on its optical axis. The corrector can be easily to built and enlarges the field of view about three times. Detailed record
	The Virtual Imaging of the Distant Objects by Longfocal Positive Lenses and Concave Mirrors Rail, Zdeněk ; Vápenka, David The longfocal positive lenses and concave mirrors can serve as optical elements increasing the angular dimensions of the distant objects similarly to telescope.\nThese properties could be probably used by ancient observers before the discovery of telescope.\nOur paper brings optical analysis and results of visual astronomical observations with the longfocal positive lens. Detailed record
	The Spherochromatic Aberration of the Clark‘s Objective Lens of the Ondřejov Observatory Rail, Zdeněk ; Šrajer, Bohdan ; Jareš, Daniel ; Vápenka, David ; Pintr, Pavel In our paper the results of mathematical simulations of the residual aberrations of Clark‘s 8 inch (diameter 203.2 mm) objective lens are presented. This achromatic dublet has been used at the Ondřejov Observatory for more than 100 years mostly for solar observation. Detailed record
	P3-TOP-TN-15001 Achievable microroughness of ASPIICS optical glass elements Bartoníček, Jiří ; Budasz, Jiří ; Hadincová, Ivana ; Horodyská, Petra ; Kaucká, Iva ; Kovačičinová, Jana ; Lédl, Vít ; Melich, Radek ; Pleštil, Jan ; Poláková, Ivana ; Procháska, František ; Psota, Pavel ; Rail, Zdeněk ; Šípová, Gabriela ; Šrajer, Bohdan ; Ulrichová, Iva ; Václavík, Jan ; Vápenka, David ; Vít, Tomáš The scope of this document is describe a test that investigates an achievable micro-roughness realized on different types of optical glasses [R1] that are planned to be employed for realization of PROBA3 coronagraph telescope. The test is realized with respect to the technological manufacturing possibilities of optical elements at TOPTEC facility. Detailed record
	Process development and prototype realization of non-symmetrical aspherical lenses Melich, Radek ; Pintr, Pavel ; Pleštil, Jan ; Poláková, Ivana ; Procháska, František ; Rail, Zdeněk ; Václavík, Jan ; Vápenka, David ; Vít, Tomáš The aim of the study is to develop a process chain and realize prototype lenses of non-symmetrical apherical lenses of given tolerances. Detailed record
	Design, manufacture and test of M1 and M2 mirror production Lédl, Vít ; Melich, Radek ; Pintr, Pavel ; Polák, Jaroslav ; Procháska, František ; Psota, Pavel ; Rail, Zdeněk ; Steiger, Lukáš ; Tomka, David ; Václavík, Jan ; Vápenka, David ; Vít, Tomáš ; Bartoníček, Jiří Design and tests for realization of M1 and M2 mirrors for METIS project. Detailed record
	Design and fabrication of anti-reflection coating on Gallium Phosphide, Zinc Selenide and Zinc Sulfide substrates for visible and infrared application Vápenka, David ; Václavík, Jan The article presents results of design and realization of dual-band antireflection coating on Gallium phosphide substrate. A layer stack of antireflection coating for bands 0.6-0.8μm and 3-5μm was designed using ZnS a MgF2 materials. Layer stack was deposited using thermal evaporation method. Expected transmittance spectra and the ones obtained on coated Gallium phosphide substrate are compared. Efficiency of anti-reflection coating is estimated and discrepancies are analysed and discussed Detailed record
	Gallium Phosphide as a material for visible and infrared optics Václavík, Jan ; Vápenka, David Gallium phosphide is interesting material for optical system working in both visible and MWIR or LWIR spectral ranges. Number of a material available for these applications is limited. They are typically salts, fluorides or sulphides and usually exhibit unfavorable properties like brittleness; softness; solubility in water and small chemical resistance. Although GaP has do not offer best optical parameters excels over most other material in mechanical and chemical resistance. The article describes its most important characteristics and outlines some applications where GaP should prove useful Detailed record
	Photonometers for coating and sputtering machines Oupický, Pavel ; Jareš, Daniel ; Václavík, Jan ; Vápenka, David The concept of photonometers (alternative name of optical monitor of a vacuum deposition process)for coating and sputtering machines is based on photonometers produced by companies like SATIS or HV Dresden. Photometers were developed in the TOPTEC centre and its predecessor VOD (Optical Development Workshop of Institut of Plasma Physics AS CR) for more than 10 years. The article describes current status of the technology and ideas which will be incorporated in next development steps. Hardware and software used on coating machines B63D, VNA600 and sputtering machine UPM810 is presented. Detailed record

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