11/21/2023 0 Comments 10 inch newtonian telescopeOur mirrors are centre marked for ease of collimation. We coat our mirrors with aluminium in a vacuum coating chamber and finish with protected coating of SiO2 which guarantees the highest longevity and efficiency of 93% reflectivity.Īll our mirrors have serial numbers as well as a complete report of its testing. Please go through this essay on Float Glass Mirrors. Thin glass blanks of float glass achieve thermal stability quickly. Float glass is a softer than other glass materials and consequently it can be polished to a great degree of accuracy and smoothness. In the near future we will be in a position to offer fused glass primary mirrors of 38 mm thickness. We offer Primary Mirrors made from Float Glass, thickness 25 mm. A smooth surface provides a much better contrast at the eyepiece, and is especially beneficial for revealing fine detail on planetary surfaces. Apart from the Strehl ratio, we endeavour to produce an excellent smooth surface with no micro ripple or roughness. A Strehl ratio of 0.8 is good, 0.9 is excellent, 0.95 or better is outstanding. Newtons first reflecting telescope was completed in 1668 and is the earliest known functional reflecting. The best opticians now use the Strehl ratio for specifying the quality of primary mirrors. The Newtonian telescope, also called the Newtonian reflector or just a Newtonian, is a type of reflecting telescope invented by the English scientist Sir Isaac Newton, using a concave primary mirror and a flat diagonal secondary mirror. The mirrors are frequently tested for accuracy of overall figure as well as for the smoothness of the surface.Īll our Primary Mirrors are guaranteed to a Strehl Ratio of 0.90 or better. All our primary mirrors are precision made and finished with hand figuring to a perfect parabola. We have a complete in-house production facility. Reflectivity and quality of aluminisation and protective coating.Īt Aperture Telescopes, we offer Parabolic Primary Mirrors in diameters of:Īll proudly Made in India, right here at our optics shop at Manesar, Gurgaon.Quality of reflecting surface, accurately parabolised, smoothness of micro surface,.The main considerations for purchasing a Primary Mirror are as follows: The performance of a telescope is mainly dependant on the quality of its Primary Mirror. The Primary Mirror is also known as the Objective and is the heart of a good telescope. The ‘Primary Mirror’ is the principal light-gathering surface of a reflecting telescope.
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