Composition for a cover of a golf ball
AssigneeE. I. Du Pont de Nemours and Company
InventorsYoshiyuki Iwase, Sumio Fujita, Eisaku Hirasawa
Life of this patent
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Abstract
A scale has marks or a point-symmetrical shape which are arranged in matrix. The scale and an article to be measured in dimension are positioned without any relative movement. An image sensor unit detects a predetermined portion of the article and the marks of the scale corresponding to the predetermined portion of the article selectively and successively, and the image sensor unit generates output signals in accordance with the detected results of the article and the scale. The output signals are processed to calculate the dimension of the article.
Claims12
A scale to be used in an apparatus for measuring dimension of an article, comprising:
- a scale substrate;
- marks arranged in a matrix on said scale substrate, each of said marks having a width of W and a height of W, and being arranged by a pitch of P1, and each of said marks being of a point-symmetrical shape,
- wherein said marks meets conditions as defined below,
- 2P1+W<V,
- W<P1/2, and
- 2P2≦W
- where V is a length of a side of a view area of an image sensor unit for detecting said scale, and P2 is a pitch of matrix-arranged sensors of the image sensor unit.
A combination scale and image sensor unit for an apparatus for measuring a dimension of an article,
- said scale comprising a substrate with a first matrix of symmetrically shaped marks thereon which are arranged in the first matrix with pitch P1, each of the marks having a corresponding internal distance which is approximately W;
- said image sensor unit for detecting said marks on said scale in a view area with a side of length V and comprising plural sensors arranged in a second matrix with a pitch P2;
- and
- wherein,
- 2P1+W<V,
- W<P1/2, and
- 2P2≦W.
Dependencies are inferred from the claim text.