An important novelty is that recently in Croatia can aluminizirati mirror (mirror) reflector telescope. The company performs a service labs doo thin layer of aluminum on a reflexive indented primary mirror telescope diameter to 300mm. In Ghetaldusovoj vacuum chamber on a glass disc (polished into a spherical or parabolic shape) first applied a layer of aluminum, and silicon dioxide protective layer that prevents oxidation of aluminum.

Price aluminizacije 1.10 Kuna / mm diameter mirrors + VAT. Therefore, for aluminizaciju large mirror diameter 300mm to pay about 350 kuna, a protective layer is included in the price. Reflectivity layer of aluminum is 91%.

This notice is published Stipe government first October 2009. in internet forums "nctu.club.astronomy and experts were immediately realized its importance, because until now aluminizaciju mirrors must be carried out abroad (Italy, Germany, Hungary ...).

In my astronomy inventory of more than 20 years I have kept the two parabolic mirrors in Newtonian reflector telescope diameter of 120mm, which I bought from Sarajevo Center amateurs. Mirrors are most likely made in Sarajevo in the factory air optics. One of these mirrors is a mistake on a flat aluminised - nebrušenoj side and therefore was unfit for the manufacture of telescopes. This glass parabolic profile I donated to the school where I work (OS Vladimitra Nazora, Virovitica), provided that schools pay the cost aluminizacije and that this is a mirror to serve students SAMOGRADNJA Newtonian telescope with Dobsonovom editing.

Mr. Darko Seles from company labs demonstrated exemplary business efficiency by opening opportunities aluminizacije mirror the terms in December 2009. Or during January 2010. Glass is coated with several layers of corrugated cardboard and cotton wool, mail promptly sent to aluminizaciju in the December period and a week later returned. Aluminizacija was successfully carried out and an old piece of glass for the first time the sun's rays are focused in the snow shackled schoolyard at the time of winter solstice. Young astronomers expect to nastrpljenjem SAMOGRADNJA Newtonian telescope during the winter school holidays. Aluminizacija 120mm diameter mirror of this cost is 162 dollars, or a total of 220 kuna, when it added the cost of sending registered mail.

Among the amateurs in Croatia has samograditelja that his telescope assembled from factory-made optical and mechanical parts. But among them there are fewer so-called. "Glass slide" to creatively enjoy grinding spherical or parabolic mirrors our own hands. Before 40 years, the first process of grinding the mirror in the Belgrade magazine popularized Kosmoplov ing Mladen Hudec and his son, Goran Hudec , now a doctor of science and university professor.

Twenty years ago grinding mirrors for telescopes taught at summer schools of astronomy in the Istrian Višnjanu under the leadership of Dr. Zeljko ANDREIĆ and prof. na kojima svoja bogata iskustva mlađim naraštajima nadahnuto prenose vodeći hrvatski samograditelji teleskopa dr.sc. Korado Korlević. has been recently held in Korenica summer school grinding mirrors for telescopes , where his experience to younger generations inspired transmitted leading Croatian samograditelji telescope, Ph.D. . Zeljko Andreić, Berislav Bračun and Stipe government .

Over the past few years, many are faceted and polished glass telescopic remained unusable because it was impossible to aluminizirati in Croatia. Now this is over now! Economic crisis and the creative and research inclinations soon may result in numerous projects of mirrors and telescopes amateur SAMOGRADNJA in Croatia.

Maybe we will in future labs to enable selection, instead aluminizacije at a somewhat higher price of our telescope mirror posrebrimo for higher reflectivity (95-97%). If you solve the problem of efficient removal of the old, the used layers of aluminum with telescopic mirrors for applying a new layer of high reflectivity, many of the owners of the old factory-made telescope mirror might want to labs and specialists to their "pets give new youth", ie, extend service life!

Required information:

• Ghetaldus Mining Ltd. dear 17, 10430 Samobor
• Contact person: Darko Seles
• Tel. +385 1 55 95 214, Fax. +385 1 55 95 292, Mob. +385 91 48 47 718
• e-mail: darko.s ... si@ghetaldus.hr