Author Archives: admin
FOR SALE
Diameter of Primary Mirror 315mm 315mm. Focal Length 1560mm. The plate thickness of about 40mm Material- Optical Glass Bk 7 Price 1700PLN Mirror sputtered. It has a recess visible in the picture. That gap is not an open field and was cut and before figuryzacją. There is no … Read more
Examination of flat mirrors
Often the bad images the telescope primary mirror is not responsible or bad collimation optics, but just plane mirror. Plane mirror should have a precision of lambda / 4 and if it is issued with one, This will produce very good images. The best form of checking the quality of execution of the mirror … Read more
-Collimated binoculars justification.
Binoculars are a good tool for observing the night sky. First, they are mobile, you can take with you everywhere; in the case of smaller magnifications give the opportunity to observe without a tripod (binoculars are especially prized by the parameters 10×50 i 7×50), so … Read more
Polishing
Polishing of the mirror and give it the desired shape is obviously the most difficult stage in the whole construction of the telescope; this follows from the need to give the mirror telescopic aspherical shape with very high accuracy. I, if mirror grinding, its shape did not have a big impact, … Read more
Something about anti-reflective layers and possibilities of their recovery in the old optics.
What are anti-reflection layer, probably most people know. They increase the amount of light passing through the optical system. This is done napylając glass surfaces with well-defined layer thickness, material with a suitably chosen refractive index. In theory, as … Read more
Grinding
I will not duplicate messages, which is a lot about grinding mirrors for telescopes in amateur conditions. Instead I will focus on errors, that most beginners make when grinding cutters. PHASE . Before you start sanding it is essential to carry out phase on the ground. … Read more
The study intended to mirror glass in terms of stress.
Of whether the glass is to stress , or not depends, whether he can manage to do him a good mirror. There are those who argue, that the stresses in the glass in no way interfere, But I strongly advise against working with glass poorly relaxed. Read more
Reflective layer.
Aluminizacji mirror can not obviously be done in home conditions. It is our mirror to give to a plant specializing in the performance of optical thin films. Warn against spraying the mirrors in companies engaged in automotive headlight reflectors because the reflectivity of the layer and the uniformity of coverage … Read more
Grinding and polishing powders.
POWDER GRINDING. The most commonly used powder is silicon carbide sanding (SIC) Zwany Karborundem. This material is obtained by artificially, having a color from greenish to black, which comes from pollution (pure is colorless).Its hardness on the Mohs scale is about. 9,2 do 9,5 … Read more