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	Stability of an optical monitor for deposition of 42-layer interference bandpass filter 520-590 nm Žídek, Karel 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. Detailed record
	Study on polishing of ZnSe with diamond suspension Procháska, František ; Thoř, Tomáš Observe the effect of diamond slurries as polishing element on ZnSe, i.e. observe the change of surface of ZnSe as consequence to the series of polishing with the use of mentioned diamond slurries. Detailed record
	A Glued Objective Lens of the Steinheil Type Rail, Zdeněk ; Franců, Helena ; Ulrichová, Iva ; Šípová, Gabriela ; Jareš, Daniel ; Kuryshev, V. ; Vápenka, David This paper analyses the achromatic dublets with an entrance lens of the flint glass. The objective lens of this construction were devised by German physician Carl August Steinheil in the half of the 19 th century. Several pieces of these dublets were manufactured for astronomical purposes in our workshop in the past. We discuse the mathematical evaluation and the method of manufacture of the glued Steinheil objective with plane exit surface. Detailed record
	The Telescopes of Dall-Kirkham Rail, Zdeněk ; Ulrichová, Iva ; Kuryshev, V. ; Vápenka, David The paper deals with the optical aberrations of the two-mirror telescopes composed of the ellipsoidal primary and the spherical secondary mirrors. The system was discovered by Horace Dall and Alan Kirkham at the end of the Twenties of the 20th Century. Its optical elements are easy to manufacture and measure. These telescopes can be equipped by lens correctors and turned into multipurpose devices both for planetary observation and wide field photography. Several telescopes were manufactured in workshop of the Toptec Center in Turnov. Detailed record
	The Repair of an Objective Lens 160/2500 of the Observatory in Turnov Rail, Zdeněk ; Melich, Zbyněk ; Šrajer, Bohdan ; Šípová, Gabriela ; Kaucká, Iva ; Franců, Helena ; Melich, Radek This paper brings the information about repair of the achromatic objective lens of diameter 160mm and focal length 2500mm produced by the Development Optical Workshop of the ČSAV in Turnov. The refractor with this dublet has become the main telescope of a local astronomical observatory. The positive lens contained impurities – schlieren and it was necessary to produce a new lens and change it. Detailed record
	The Maksutov´s Systems from Turnov Rail, Zdeněk ; Melich, Zbyněk ; Jareš, Daniel ; Pintr, Pavel ; Vápenka, David This paper deals of a design and a manufacture of optical systems with the entrance meniscus corrector of Maksutov. Many of these high performance systems have been manufactured in several workshops in Turnov since Seventies. We present our experience with the optical design, manufacture and construction of the meniscus telescopes and cameras in this article. Detailed record
	The Optical Parameters of Famous Refractors Rail, Zdeněk ; Jareš, Daniel ; Pintr, Pavel ; Vápenka, David In this paper we publish the optical parameters of several historic telescopes, which we have found in scientific literature or web pages. Data were inputed into the optical program ZEMAX, which evaluated their residual aberrations. Detailed record
	The Simulation of Residual Optical Aberrations of the Objective Lens of Merz 124/1477 Rail, Zdeněk ; Melich, Zbyněk ; Šrajer, Bohdan This objective lens was renoved in the Institute of Plasma Physics, v.v.i. Center Toptec in Turnov. During the process we got a possibility to measure the objective lens on the optical bench and to evaluate its residual optical aberrations. The objective lens was manufactured in 1860-1870 years Detailed record
	Physical and astronomical discussions Oupický, Pavel Paper is oriented on the problem parts of physic and astronomy .\nLast year I tried a few considerations about the physical astronomical problems (the FAU I.) in which I did not have a clear or vice versa, I think that they clearly have .. in anything but I'm not too sure, especially with some of the problems was clear to me that some of my comments may be next as they say .. and it was one of the motivations that led me to this sequel .. something i will continue here, something correct and perhaps in between appear as something new and interesting. This time I am going to deal with the following areas of concern of physics and astronomy. Detailed record
	Physical and astronomical discussions Oupický, Pavel The paper is oriented on the problem parts of physic and astronomy physical Detailed record

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