Source: http://www.google.com/patents/US7596288?ie=ISO-8859-1
Timestamp: 2015-05-29 06:45:27
Document Index: 198053510

Matched Legal Cases: ['art 342', 'art 344', 'art 342', 'art 242', 'art 342', 'art 242', 'art 342', 'art 732', 'arts 734', 'art 732', 'arts 736', 'art 732', 'arts 736', 'art 732', 'art 734', 'art 932', 'art 934', 'art 932', 'art 932', 'art 732', 'art 932']

Patent US7596288 - Micro displacement sensor - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA micro displacement sensor includes a first photonic crystal module, a second photonic crystal module, a light source and a detector. The first photonic crystal module includes a first substrate and a plurality of first photonic crystals, disposed on the first substrate and are arranged in a matrix....http://www.google.com/patents/US7596288?utm_source=gb-gplus-sharePatent US7596288 - Micro displacement sensorAdvanced Patent SearchPublication numberUS7596288 B2Publication typeGrantApplication numberUS 11/964,539Publication dateSep 29, 2009Filing dateDec 26, 2007Priority dateDec 27, 2006Fee statusPaidAlso published asCN100582656C, CN101210802A, US20080159685Publication number11964539, 964539, US 7596288 B2, US 7596288B2, US-B2-7596288, US7596288 B2, US7596288B2InventorsZhen-Feng Xu, Guo-Fan JinOriginal AssigneeTsinghua University, Hon Hai Precision Industry Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (42), Referenced by (1), Classifications (11), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetMicro displacement sensor
US 7596288 B2Abstract
18. The micro displacement sensor as claimed in claim 16, wherein the fifth part has a length in an approximately range from 10 a to 30 a, where a is a lattice constant. Description
Some of the second photonic crystals 320 in the matrix are missing. Defected photonic crystals are arranged in the matrix of the second photonic crystals 320 in order to form a second light guide channel 340. The second light-guide channel 340 has a light coupling end 346 and a first light detected end 348. In the present embodiment, the second light-guide channel 340 is formed in “ ” shape, as shown in FIG. 1. Particularly, the second light-guide channel 340 includes a third part 342 and a fourth part 344 that are perpendicular with each other. In addition, the third part 342 of the second light-guide channel 340 is parallel to the first part 242 of the first light-guide channel 240. Particularly, the third part 342 is spaced apart from the first part 242 by a row of the array of first photonic crystals 220 and by a row of the array of second photonic crystals 320. In such case, when the photonic crystals are adjacent to each other, the distance from the center of the last row of photonic crystals, in the substrate 210, to the center of the first row of photonic crystals, in substrate 310, is d1. The distance d1 can be approximately from 0.7 a to 1.1 a. In addition, the third part 342 has a length L in an approximately range from 10 a to 30 a.
In the present embodiment, the first photonic crystal module 70 includes a first substrate 710 and a plurality of first photonic crystals 720 disposed on the first substrate 710. The first photonic crystals 720 are arranged in a matrix and some of the first photonic crystals 720 are missing in order to form a first light-guide channel 730. The first light-guide channel 730 has a first part 732 and three second parts 734, 736, 738 disposed perpendicularly to and communicate with the first part 732, as shown in FIG. 3. Two of the second parts 736, 738 are disposed at two ends of the first part 732 and the other 734 is disposed between them so that the first light-guide channel 730 is in a “ ” shape. Each of the second parts 736, 738 at ends of the first part 732 has a light output end 750, 760 and the second part 734 disposed between them has a light input end 740 which the light source 62 is disposed adjacent to.
The second photonic crystal module 80 is parallel to and disposed to one side of the first photonic crystal module 70. The second photonic crystal module 80 includes a second substrate 810 and a plurality of second photonic crystals 820 disposed on the second substrate 810. The second substrate 810 and the first substrate 710 are coplanar. The second photonic crystals 820 are arranged in a matrix where an array of the second photonic crystals 820 is aligned with an array of the first photonic crystals 720. Some of the second photonic crystals 820 in the matrix are missing in order to form a second light-guide channel 830. In such case, the second light-guide channel 830 is in a “ ” shape. The second light-guide channel 830 has a first light coupling end 836 and a first light detected end 838. The first detector 64 is disposed adjacent to the first light detected end 838.
Some of the third photonic crystals 920 are missing. Defected photonic crystals are arranged in the matrix of the third photonic crystals 920 in order to form a third light-guide channel 930. The third light-guide channel 930 has a second light coupling end 936 and a second light detected end 938. The second detector 66 is disposed adjacent to the second light detected end 938. In the present embodiment, the third light-guide channel 930 is in a “ ” shape, as shown in FIG. 3. In particular, the third light-guide channel 930 has a fifth part 932 and a sixth part 934 disposed perpendicularly to and communicates with the fifth part 932. The fifth part 932 spaces apart from and is parallel to the first part 732 of the first light-guide channel 730 by a row of the array of the first photonic crystals 720 and a row of the array of the third photonic crystals 920. In such case, the distance from the center of the last row of first photonic crystals 720, in the substrate 210, to the center of the first row of third photonic crystal 920, is d2. The distance d2 is in an approximately range from 0.7 a to 1.1 a. In the present embodiment, the distance d2 and the distance d1 from the center of the last row of first photonic crystal 720 to the center of the first row of the second photonic crystal 820 are the same. In addition, the fifth part 932 has a length in an approximately range from 10 a to 30 a, where a is a lattice constant.
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