National Repository of Grey Literature 17 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
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
Melich, Zbyněk ; Rail, Zdeněk ; 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.
CNT composite - polishing methods and metalic coating
Thoř, Tomáš ; Václavík, Jan ; Vápenka, David
This study summarizes R&D tasks done in order to develop technology for polishing and metallic coating of CNT composite for optical and radiofrequency applications. Development was done on two types of material samples:\n- Material for the MIRROR demonstrator\n- Material for the FEEDHORN demonstrator
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.
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.
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 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.
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.
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.

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