In the field of optical, measuring the appearance shape of an object is through the grain meter long grating device to measure.We now lang grating measurement device is how to make me say.Schlieren apparatus through the process of light projection optical system of light and shade change to suborn outside irregularity or external object to be tested the premise of change in the refractive index, reflectivity and transmissivity, is often used to stop the fluid velocity field outside the interpreting theory, solution concentration, straightness, etc.A is used to measure reflection lines outside the shadow device assembly, contains the point light source, a beam splitter, reasonably straight mirror and a blade spatial filter.The reason for thing;Point light source the light of the back after spectroscope spectral together after collimating lens collimation to shine on the outside of the object to be tested, after another have imaging on the view screen.From outside of the tested beam reflected back to come after spectroscope agglomeration on like 3 d, if measured outside is a solid, the reflected beams will be like gathered into a infinitesimal spot on the stereo.If reflection is an irregular outside, outside its core imaging or above, or below.In the core place on a knife edge, the edge will be truncated reflected beams of a department.Light is blocked the department will constitute dark stripes on view screen, while the light is not blocking the department on the view screen form bright stripe, as to constitute light and shade on the view screen and the intervention of the graphics.From the graph can be to detect parameters measured outside the department.In essence, is examined by the schlieren apparatus outside height change on a bias (X) of gradient change, in order to obtain of changes on the (Y) on the other hand, to, to the end of the object to be tested at the end of the migration of blade to turn 90 °, is the X, Y to the gradient on the changes necessary to leave to stop measurement, and the bias means less sure.This kind of blade type grain shadow instrument's biggest problem is that it is a semi-quantitative measurement assembly.A simple and so lang grating device assembly, there are other questions to our company to consult!Our telephone number: 0816-6204826 |
