Optical signal reading apparatus using light leaked out of light transmission path
First Claim
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1. An optical signal reading apparatus comprising:
- a light transmission path having gratings provided along said light transmission path so that index of refraction along said light transmission path changes; and
a photoelectric converting element situated along said light transmission path to receive light leaking from said light transmission path.
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Abstract
An index-of-refraction modulating structure is formed so that an optical signal propagating through an optical fiber slightly leaks. The structure is disposed close to a photoelectric converting element for reading the optical signal.
12 Citations
36 Claims
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1. An optical signal reading apparatus comprising:
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a light transmission path having gratings provided along said light transmission path so that index of refraction along said light transmission path changes; and
a photoelectric converting element situated along said light transmission path to receive light leaking from said light transmission path. - View Dependent Claims (2, 36)
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3. An optical signal reading apparatus comprising:
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a light transmission path having an index-of-refraction modulating structure, the index-of-refraction modulating structure having periodically changing index of refraction along a light transmission path; and
a photoelectric converting element situated along said light transmission path to receive light leaking from said light transmission path. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An optical signal reading apparatus comprising:
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a light transmission path having an index-of-refraction modulating structure, the index-of-refraction modulating structure having periodically changing index of refraction along a light transmission path; and
a photoelectric converting element having a groove for adhering to said light transmission path, said photoelectric converting element situated along said light transmission path to receive light leaking from said light transmission path. - View Dependent Claims (34, 35)
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Specification