G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 11/14 (2006.01) G01B 11/00 (2006.01) G02B 6/16 (1995.01)
Patent
CA 2163161
A system for monitoring the position of a fiber (13) during drawing is provided. The system includes a beam (25) of radiation which is directed at the fiber (13), a Ronchi ruling (50) having a spatial frequency .omega.M which modulates light scattered from the fiber (13), a lens system (27) having a positive focal length, and a detector (31) located in the back focal plane of the lens system. By arranging the components of the system in this manner, the distance between the fiber (13) and the Ronchi ruling (50) is a linear function of the spatial frequency .omega.D of the modulated light at the detector (29). Various procedures can be used to determine .omega.D, a preferred one being shown in Figure 9.
Atwood Thomas Joseph
Pastel David Andrew
Reding Bruce Warren
Corning Incorporated
Gowling Lafleur Henderson Llp
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