National Repository of Grey Literature 12 records found  1 - 10next  jump to record: Search took 0.01 seconds. 
Residual Aberrations of the Gajdušek Objective Lens of Diameter 200 mm and Focal Length 3480 mm of the Observatory in Hradec Králové
Rail, Zdeněk ; Melich, Zbyněk ; Šrajer, Bohdan ; Vápenka, David ; Tomka, David ; Thoř, Tomáš ; Macner, David
The achromatic dublet of diameter 200 mm and focal length 3480 mm was manufactured by Professor ing. Vilém Gajdušek in Ostrava in 1954. The telescope with this objective is placed at the Observatory and planetarium in Hradec Králové. The objective was restored in the Institute of Plasma Physics, v.v.i.-Centrum Toptec in Turnov. During the process lens was measured and data were used for evaluation of its residual aberrations. We present the results of the measurement in this paper.
The Technology of Manufacture of a Positive Lens of Achromatic Dublet
Rail, Zdeněk ; Melich, Zbyněk ; Šrajer, Bohdan ; Šípová, Gabriela ; Ulrichová, Iva ; Franců, Helena ; Melich, Radek ; Vápenka, David ; Tomka, David ; Thoř, Tomáš
This paper deals with manufacturing of a positive lens of achromatic dublet. Diameter of the dublet is 158 mm and its focal length about 2500 mm. The glass material of the former lens was inhomogeneous and the dublet provided bad images. This is why we decided to manufacture new lens. The process was made by means of former machines of our workshop. The telescope with this dublet is placed at the Observatory of Turnov and serves for public astronomical observation.
Several Optical Designs of Off-Axis systems
Rail, Zdeněk ; Franců, Helena ; Ulrichová, Iva ; Šípová, Gabriela ; Vápenka, David ; Vávra, Emil
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.
The Residual Optical Aberrations of the Merz Objective Lens 108/1620 mm
Rail, Zdeněk ; Melich, Zbyněk ; Vápenka, David ; Šrajer, Bohdan
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.
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.
Specifics of nursing care in attitude to patients with apallic syndrome and patients in terminal stage of life.
SMETANOVÁ, Denisa
The main goal of this thesis was to discover the specifics of nursing care caring for apallic syndrome patients as well as terminal patients. In connection with this objective, eight research questions were addressed, focusing on the selected specifics. The empirical portion of the bachelor thesis was achieved through a qualitative research done in the the form of semi-structured interview which was then divided into two parts. The first part targeted patients with apallic syndrome while the second part adressed terminal patients. An open coding method was used to process obtained results. The research group consisted of nurses from the intensit care unit, nurses from the hospice and ICU aftercare department, as well as the ARO department. The results of the research - analyzed and subsequently categorized - revealed interesting findings, and we came to a conclusion that it is extremely demanding, both physically and psychologically, to care for the two groups. It seems the analysis of the results is consistent with other studies, as we discovered that nurses identify the specifics of nursing care in patients with apalic syndrom, especially in the field of hygienic care, nutrition and communication. Terminal patients are also provided with peace, quiet and to die with dignity. The bachelor thesis was written to provide an overview of the specifics of patient care with apalic syndrome and terminal patients. The result of the research is an informational material that serves not only to educate nurses and family, but also the public.
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.
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.
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
The Catadioptric System of G.M. Popov of the Observatory of Úpice
Rail, Zdeněk ; Melich, Zbyněk
During the Sixties of the Twentieth Century series of two-mirror catadioptric telescopes were designed with a correcting lens in front of their secondary mirror. One of the first designers of these devices was P.P. Argunov. His optical designs were further developed by G.M. Popov, J. Klevcov and other opticians. In 2005 one telescope of a Popov system of diameter 305 mm was manufactured in the Development Optical Workshop of Academy of Sciences of Czech Republic /now Institute of Plasma Physics of AS CR,v.v.i.-Toptec/ in Turnov. The telescope was intended to substitute an older Maksutov-Cassegrain telescope of diameter of 260 mm of the Observatory in Úpice which required the reconstruction. In this paper we present an optical design of the Popov´s system of the Observatory in Úpice and compare it with an equal commercial Schmidt-Cassegrain telescope and further devices.\n

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