In the process of optical imaging if put a three-dimensional graphics in a ambitious lens focal stereo before, after the lens focal stereo will be able to get its precise schlieren instrument changes, namely, to obtain the frequency spectrum function of it.Conversely if put a three-dimensional graphic spectrum in a ambitious lens focal stereo before, after the lens focal stereo is able to obtain the three-dimensional graphics (to reverse the coordinates of all graphics).From electronics communication practice we know that, if the standard spectrum of light to stop treatment (disposal) such as filtering to transform a standard led recovery can be a standard lamp, temper, such as removing noise standard lights, and so on.Is equivalent to can on the schlieren apparatus after focal stereo on various shape and size of aperture change graphic spectrum, this graphic again with graphics on a second lens imaging can stop disposal, get the graphics course disposal.This process is called optical information disposal, in the back focal stereoscopic aside on aperture of the lens is called a spatial filter.
Our company is mainly operating lines shadow device, photon doppler velocimeter, and instrument technology, such as planar laser induced fluorescence PLIF, our telephone number: 0816-6204826
