National Repository of Grey Literature 4 records found  Search took 0.00 seconds. 
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 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.
Polished M0 ZERODUR samples
Bartoníček, Jiří ; Melich, Radek ; Pintr, Pavel ; Rail, Zdeněk ; Franců, Helena ; Hadincová, Ivana
Process development of superpolished M0 mirror sample made of ZERODUR and realization of several demonstrators.
Witness sample of M1 protrusion
Melich, Radek ; Psota, Pavel ; Rail, Zdeněk ; Franců, Helena ; Hadincová, Ivana
Development of the technological process of M1 protrusion witness samples with a characteristic surface strength > 70MPa and realization of technology demonstrators.

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