Layout of the optical path in the image capturing system and the method of forming the same
View Patent ↗The image-capturing system comprises a image-capturing module and a plurality of mirrors, wherein the image-capturing module has a lens and a charge-coupled device (CCD). The image-capturing module is located on about the center in the image-capturing system, and a plurality of mirrors are arranged in the peripheral region within the image-capturing system to make the layout of optical path around the image-capturing module. Furthermore, reflectional angle of each mirror can be adjusted according to the requirement for design, so as to obtain the longest optical path.
1. An image-capturing system comprising:
a case having a center region and a peripheral region surrounding the center region;
an optical sensor positioned in the center region of the case; and
two or more mirrors positioned in the peripheral region of the case, wherein the two or more mirrors are positioned to direct light along an optical path that substantially encircles the optical sensor.
2. The image-capturing system according to claim 1 , wherein the optical sensor comprises a photosensor.
3. The image-capturing system according to claim 1 , wherein the optical sensor comprises a charge-coupled device.
4. The image-capturing system according to claim 1 , further comprising a lens, wherein the lens is positioned adjacent the optical sensor in the center region of the case.
5. The image-capturing system according to claim 4 , wherein the lens is positioned between the optical sensor and one of the two or more mirrors.
6. The image-capturing system-according to claim 1 , wherein a surface of one of the two or more mirrors is positioned to receive light directly from a light inlet of the case in a first reflection, and wherein the light is directed from the surface in an obtuse angle in a second reflection of the optical path.
7. The image capturing system according to claim 1 , wherein the optical sensor comprises a Complementary Metal-Oxide Semiconductor Sensor.
8. The image capturing system according to claim 1 , further comprising a double-sided mirror, wherein the case includes a light inlet, wherein a first side of the double-sided mirror is positioned to reflect light received from the light inlet, and wherein a second side of the double-sided mirror is positioned to direct the light along the optical path to the optical sensor.
9. The image capturing system according to claim 8 , wherein the double-sided mirror is positioned in the peripheral region at an approximate midpoint between two corners of the case.
10. The method according to claim 8 , wherein the double-sided mirror is positioned directly between the light inlet and the optical sensor.
11. A method comprising:
reflecting light along an optical path between two or more mirrors positioned within a case; and
receiving the reflected light at an optical sensor positioned at an approximate center of the case, wherein the optical path completely encircles the optical sensor.
12. An apparatus comprising:
means for reflecting light along an optical path;
means for receiving the reflected light at an optical sensor, wherein the optical path completely surrounds the optical sensor.
13. The apparatus according to claim 12 , wherein the optical sensor comprises four sides, and wherein the optical path passes twice by at least one side of the optical sensor.
14. The apparatus according to claim 12 , further comprising a case, wherein the means for reflecting light is positioned approximately in a perimeter of the case, and wherein the optical sensor is positioned approximately in a center of the ease.
15. The apparatus according to claim 14 , further comprising means for focusing the reflected light, wherein the means for focusing is positioned adjacent the optical sensor.
16. An apparatus comprising:
a case having two or more mirrors positioned in a perimeter of the case, wherein the two or more mirrors are configured to reflect light along an optical path; and
an optical sensor comprising four sides positioned within a center region of the case, wherein the optical sensor is configured to receive the reflected light, and wherein the optical path encircles all four sides of the optical sensor.
17. The apparatus according to claim 16 , wherein the optical path passes at least one side of the optical sensor two times.
18. The apparatus according to claim 16 , further comprising a lens positioned adjacent to the optical sensor.
19. The apparatus according to claim 16 , wherein the case comprises four sides, and wherein a mirror is positioned at an approximate midpoint along one of the sides of the case.
20. A scanner comprising:
a case;
two or more mirrors located within the case, wherein the two or more mirrors are configured to reflect light along an optical path; and
an image-capturing module comprising a photosensor, wherein the image-capturing module is configured to receive the reflected light, and wherein the optical path completely encircles the image-capturing module.
21. The scanner according to claim 20 , wherein one side of at least one of the two or more mirrors is configured to reflect light at least twice along the optical path.
22. The scanner according to claim 21 , wherein the light is reflected from two different locations of the one side.
23. The scanner according to claim 20 , wherein the two or more mirrors comprise a first mirror and a second mirror, wherein the optical path is perpendicular to the light incident on the first mirror, an wherein the optical path is non-perpendicular to the light incident on the second mirror.
24. A method comprising:
reflecting light along an optical path between two or more mirrors positioned within a case; and
receiving the reflected light at an optical sensor positioned at an approximate center of the case, wherein the optical path at least partially encircles the optical sensor, wherein the case comprises four corners, wherein a mirror is positioned in each of the four corners, and wherein a double-sided mirror positioned intermediate two of the four corners is configured to reflect the light two times.
25. The method according to claim 24 , wherein each mirror in the four corners is angled to reflect light a single time along the optical path.
26. The apparatus according to claim 24 , wherein the double-sided mirror comprises a first surface and a second surface oriented opposite the first surface, and wherein both the first and second surfaces are configured to reflect light.
27. The apparatus according to claim 26 , wherein the first surface of the mirror reflects light entering through a light inlet of the case, and wherein the second surface reflects light to the optical sensor.