Dimple position detection device and dimple position detecting method for disk drive suspension
First Claim
1. A device for detecting a position of a dimple formed on a load beam of a disk drive suspension, the dimple having substantially a dome shape of a circular-arc rotor such that a top of the dimple is substantially located at a center of the dimple, and the dimple having a concave back surface, the device comprising:
- a workpiece fixing jig for holding the disk drive suspension to be inspected, wherein the disk drive suspension holdable by the workpiece fixing jig includes the load beam and a flexure which is fixed to the load beam, the flexure comprising a tongue portion which is in contact with the top of the dimple;
an illumination device which directs illumination light toward the back surface of the dimple along an axis of the dimple of the disk drive suspension which is holdable by the workpiece fixing jig;
an imaging device which acquires an image of light reflected by the back surface of the dimple along the axis of the dimple, the reflected light having a peak which appears in a position corresponding to the top of the dimple; and
an image processing section which processes the image acquired by the imaging device;
wherein the image processing section includes;
means for binarizing the image of the reflected light,means for changing a binarization level so that an area of a light spot region obtained by the binarization has reached at least a predetermined value,means for obtaining a position of the dimple top based on the light spot region, when the area of the light spot region has reached at least the predetermined value, andmeans for performing error processing when the area of the light spot region cannot reach the predetermined value.
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Accused Products
Abstract
A dimple position detection device for detecting a position of a dimple formed on a load beam is provided with an illumination device, imaging device, and image processing section. The illumination device directs illumination light toward the dimple. The imaging device receives reflected light from the dimple. The image processing section binarizes an image obtained by the imaging device. The image processing section maximizes a binarization level, binarizes the reflected light image, determines whether an area of a light spot region or on-region above the binarization level has a predetermined value, reduces the binarization level when the area of the light spot region is less than the predetermined value, and calculates the gravitational position of the light spot region with the predetermined value reached by the light spot region area.
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Citations
10 Claims
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1. A device for detecting a position of a dimple formed on a load beam of a disk drive suspension, the dimple having substantially a dome shape of a circular-arc rotor such that a top of the dimple is substantially located at a center of the dimple, and the dimple having a concave back surface, the device comprising:
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a workpiece fixing jig for holding the disk drive suspension to be inspected, wherein the disk drive suspension holdable by the workpiece fixing jig includes the load beam and a flexure which is fixed to the load beam, the flexure comprising a tongue portion which is in contact with the top of the dimple; an illumination device which directs illumination light toward the back surface of the dimple along an axis of the dimple of the disk drive suspension which is holdable by the workpiece fixing jig; an imaging device which acquires an image of light reflected by the back surface of the dimple along the axis of the dimple, the reflected light having a peak which appears in a position corresponding to the top of the dimple; and an image processing section which processes the image acquired by the imaging device; wherein the image processing section includes; means for binarizing the image of the reflected light, means for changing a binarization level so that an area of a light spot region obtained by the binarization has reached at least a predetermined value, means for obtaining a position of the dimple top based on the light spot region, when the area of the light spot region has reached at least the predetermined value, and means for performing error processing when the area of the light spot region cannot reach the predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification