制作折射望远镜的英文步骤~100分~

Production steps of refracting telescope:
Preparation:advance planning to pursue the diameter telescope,coke rate.According to buy the lens-drawn road map,that is,the whole objective lens diameter and effective eyepiece (or camera) effective full-caliber direct connection,not to block any component of this light path.And start practical:
1.Lens specifications by precision machining a metal-Block.
2.For a period of length and diameter,thickness of the pipe are appropriate,recommend rigid aluminum alloy,cylinder wall thickness of not less than the diameter of 1 / 50,no larger than 1 / 30,
3.Cylinder wall to deal with extinction,and 1-3 with tin-do-diameter ranging from extinction aperture,placed in a design position.Such as direct-to-find installed in the shaft,it is necessary to better support pre-drilled mounting holes.
4.Mirror Block,and the shaft connecting adjustable ring devoted to general processing.- Block,and with it the connection is threaded barrel and screw in two ways.
5.Focusing on a buy,sell Zhitong there,but the two "no teeth to increase to more than 400 Central ocean.Shaft to Central and to tie in with good.
6.More than a few properly installed on the telescope tube forming the main,other accessories such as the eyepiece,the zenith mirror,look-mirror,mirror Barrow,camera interface and the packet filter hoop,Haeundae both boards,etc.Optional finished,
Principle of Refracting telescope:
Refracting telescope is used to light-lens crop convergence of the system.The first is an astronomical telescope of Galileo made refracting telescope,using convex lens to lens.Because of different shade of glass of different refractive index,refracting telescope will have a serious color,and later the use of composite refracting telescope lens as a lens,that is,from more than two lens components,used to eliminate color (such as the United States Meade's ED series).According to the different optical path,refracting telescope into Galileo and Kepler telescope two telescopes.Refracting telescope is usually the relative small-caliber,long focal length,large-scale film,higher resolution,more suitable to do the work of celestial bodies measurement (for example,measuring the star's position,the angle from the Double Star,etc.).