Thickness of the formation which is attached to the cylindrical shape body and manner and the device in order to measure concentricity

摘要

(57) Abstract The optical fiber (1) the occasion where deflection from concentric position of the conservation polyimide canning which is attached on is measured, absorption of light in the midst of this canning is used. The illuminant like the laser (9) puts out the light ray, that with bimusupuritsuta (11) splits into two light rays. With the mirror (15 and 17) which is laid out suitably, at the same time these light rays on the side where the fiber (1) two opposes, this fiber (1) vis-a-vis lengthwise diagonal in order to hit in equal angle of incidence, it guides. These light rays in order to avoid the fact that it hits against the detector (13 and 19) to which the light ray which you are wrong receives reflected light, hit against the fiber at the position where it displaces to the lengthwise of the fiber a little. These detectors send the signal which displays the strength of reflected light to the subtraction circuit, that circuit makes the difference of the signal from of these detectors (13 and 19). When it does, this difference signal is the scale of concentricity error of this canning. You can obtain simple manner and the device to this way, those, when canning is pushed out with the drawing tower which produces the fiber in measurement of concentricity you can also use the online. Also absolute measurement the thickness of canning, to do by measuring concerning the fiber which possesses the canning which is calibrated.