Device for measuring eccentricity of optical fiber preform
A technology of optical fiber preform and measuring device, which is applied in the field of measurement, can solve the problems of affecting eccentricity results, affecting the optical fiber manufacturing process, and poor adaptability of large-size optical fiber preforms, etc., and achieves the effect of improving measurement accuracy
Pending Publication Date: 2022-03-04
NANTONG UNIVERSITY
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Problems solved by technology
[0002] The optical fiber preform is a material preform that can be used to draw optical fibers. It should be a uniform cylinder in an ideal state. In fact, due to the unevenness of spraying in the spraying manufacturing process, different eccentricity values are generated locally on the rod. This kind of eccentricity will affect the subsequent optical fiber manufacturing process, so it needs to be detected; the existing measurement technology includes laser measurement technology and image detection technology, the implementation cost of laser measurement technology is high and the adaptability to large-size optical fiber preform poor; and the existing image detection technology such as the patent application number is "201210378620.X" Chinese invention patent, the optical fiber preform is placed under the backlight to take pictures, and the distance between the core rod boundary and the outer cladding boundary of the optical fiber preform is calculated by image processing technology to further obtain the eccentricity value
As mentioned above, the technical problem to be solved by this technology is how to measure the eccentricity value of the optical fiber preform, but the structural setting of the bracket ignores the eccentricity value of the optical fiber preform. Specifically, the optical fiber preform is placed in the support On the roller of the frame, when the roller rotates, the cross-section of the part in contact with the outer edge of the optical fiber preform is not a regular circle, which causes the axis of the optical fiber preform to vibrate horizontally or vertically, thus affecting the image captured. Calculated eccentricity results
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[0023] The present invention will be further described below in conjunction with accompanying drawing of description and embodiment:
[0024] Such as Figure 1-2 In the shown optical fiber preform eccentricity measuring device, the optical fiber preform 3 includes a core rod and an outer cladding wrapped on the core rod; The image acquisition device includes a bracket 1 and a detection mechanism 2, the bracket is provided with a roller bracket 17 for horizontally placing the optical fiber preform 3 to be detected, and the detection base 2 is arranged on one side of the bracket ,Such as Figure 4 As shown, the bracket 1 includes a support frame 11, two roller brackets 12 and two end brackets 13, the two roller brackets are fixedly arranged on the support frame along the longitudinal direction of the support frame, and one roller bracket is symmetrically and rotatably arranged There is a driving wheel 121 and a driven wheel 122; the driving wheel and the driven wheel all inclu...
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The invention relates to a device for measuring the eccentricity of an optical fiber preform. The optical fiber preform comprises a core rod and an outer wrapping layer wrapping the core rod, two ends of the outer cladding layer are conical parts, and the middle part of the outer cladding layer is a parallel part for connecting the two conical parts; comprising a bracket, a detection base, a longitudinal sliding plate, a detection vertical arm, a conical part light source, a conical part detection camera, a parallel part light source and a parallel part detection camera, different tire pressures are set for the pneumatic tires arranged on the driving wheel and the driven wheel, so that the optical fiber preform is stably borne on the roller support without rigid collision, then the pneumatic tires release pressure to enable part of gravity of the optical fiber preform to be borne in the positioning groove, and the axis of the optical fiber preform is positioned by the self weight; transverse or vertical movement of the mandrel caused by outer diameter change of the optical fiber preform is avoided, and it is ensured that transverse change of the boundary of the optical fiber preform in the subsequent measurement process is only the eccentric distance, so that the measurement precision is improved.
Description
technical field [0001] The invention relates to the field of measurement technology, in particular to a device for measuring the eccentricity of an optical fiber preform. Background technique [0002] The optical fiber preform is a material preform that can be used to draw optical fibers. It should be a uniform cylinder in an ideal state. In fact, due to the unevenness of spraying in the spraying manufacturing process, different eccentricity values are generated locally on the rod. This kind of eccentricity will affect the subsequent optical fiber manufacturing process, so it needs to be detected; the existing measurement technology includes laser measurement technology and image detection technology, the implementation cost of laser measurement technology is high and the adaptability to large-size optical fiber preform poor; and the existing image detection technology such as the patent application number is "201210378620.X" Chinese invention patent, the optical fiber pre...
Claims
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IPC IPC(8): G01B11/27
CPCG01B11/27
Inventor姚建南费胜沈厚谊陈建军樊鉴乐
OwnerNANTONG UNIVERSITY