A camera module including a particle trap. The particle trap may be disposed in the camera module and may be operable to prevent particles from obstructing an optical path defined between a lens assembly and an image sensor. The particle trap may include a particle getter to retain particles in cont
A camera module including a particle trap. The particle trap may be disposed in the camera module and may be operable to prevent particles from obstructing an optical path defined between a lens assembly and an image sensor. The particle trap may include a particle getter to retain particles in contact with the particle trap. The camera module may be operative to move the lens assembly so as to provide focus on the image sensor for objects at various distances from the camera module. The movement of the lens assembly may be a source of particles retained by the particle trap.
대표청구항▼
1. A camera module, comprising: an image sensor;a lens, wherein an optical path is defined between the lens and the image sensor at least partially along an optical axis of the lens;at least one particle source having at least one particle aperture where particles are able to exit the at least one p
1. A camera module, comprising: an image sensor;a lens, wherein an optical path is defined between the lens and the image sensor at least partially along an optical axis of the lens;at least one particle source having at least one particle aperture where particles are able to exit the at least one particle source;and a particle trap having a groove and disposed between the at least one particle source and the optical path, the groove being laterally offset from the particle aperture such that the groove and the particle aperture do not overlap parallel to the optical axis and the groove being adapted to collect particles from the at least one particle source without the particles entering into the optical path, wherein the particle trap includes a particle getter within the groove to retain the particles upon contact of the particles with the particle getter, wherein the at least one particle source includes the contact between a lens carrier and a guide member during the relative movement of the lens carrier and the guide member, and further wherein the guide member is operable to limit movement of the lens carrier to along the optical axis of the lens. 2. A camera module according to claim 1, wherein the lens is supportably engaged by a lens barrel and the lens barrel is operatively associable with the lens carrier, and wherein the lens carrier is displaceable with respect to the image sensor along the optical axis of the lens. 3. A camera module according to claim 2, further comprising: a frame in a fixed relation with respect to the image sensor, the frame including an inner surface at least a portion of which defines an inner volume, wherein the optical path extends through at least a portion of the inner volume. 4. A camera module according to claim 3, wherein the lens carrier is moveable relative to the guide member, and wherein at least a portion of the lens carrier contacts the guide member during movement of the lens carrier with respect to the guide member. 5. A camera module according to claim 4, wherein the lens barrel is interconnectable with the lens carrier, wherein the at least one particle source includes the interconnection between the lens barrel and the lens carrier. 6. A camera module according to claim 3, wherein the guide member includes one or more shafts engaged with the frame, wherein said one or more shafts extend longitudinally in a direction substantially parallel with the optical axis of the lens. 7. A camera module according to claim 3, wherein the particle trap includes a projection extending from the inner surface of the frame, wherein the projection includes an edge portion adjacent to at least a portion of the lens barrel. 8. A camera module according to claim 7, wherein the edge portion extends along all of a perimeter of the lens barrel. 9. A camera module according to claim 8, wherein the edge portion defines an annular opening through which the lens barrel extends. 10. A camera module according to claim 9, wherein the edge portion contacts the lens barrel such that the edge portion is slidably engaged with the lens barrel. 11. A camera module according to claim 10, wherein the groove is adjacent to at least a portion of the edge portion. 12. A camera module according to claim 11, wherein the groove extends adjacent to the entire edge portion. 13. A camera module according to claim 12, wherein the particle getter is disposed in at least a portion of the groove. 14. A camera module, comprising a frame;one or more guide members positioned relative to the frame;a lens,a lens carrier moveable with respect to the guide members, wherein the guide members are operable to restrict movement of the lens carrier to a direction parallel with an optical axis of a lens supportably engaged by the lens carrier;an image sensor in disposed relative to the frame, wherein the lens carrier is moveable with respect to the image sensor, wherein an optical path is defined between the lens and the image sensor at least partially along the optical axis of the lens, and further wherein a particle source cavity is formed laterally between the frame and the lens carrier, the particle source cavity having a lower opening where particles are able to exit the cavity toward the optical path;a particle trap extending from the frame, wherein the particle trap terminates adjacent to a lens barrel operatively associated with the lens carrier, and further wherein the particle trap comprises an annular groove defined by a floor, an inner wall and an outer wall, wherein the outer wall is angled with respect to the optical axis such that the top of the outer wall is farther away from the inner wall than the bottom of the outer wall, the inner wall is substantially parallel with the optical axis and the inner wall is taller than the outer wall, wherein the groove is laterally offset from the lower opening such that the groove and the lower opening do not overlap parallel to the optical axis; anda particle getter disposed on at least a portion of the particle trap, wherein upon contact of the particles and the particle getter, the particle getter is operable to retain the particles in contact therewith. 15. A camera module according to claim 14, wherein the annular groove is adjacent to an edge portion of the particle trap, wherein the edge portion extends about a perimeter of the lens barrel. 16. A camera module according to claim 15, wherein the particle getter is disposed in the annular groove. 17. A method for use with a camera module, the method comprising: moving a first component of the camera module relative to a second component of the camera module;generating one or more particles during the moving operation;trapping the one or more particles after the particles exit a particle aperture between the first component and the second component with a groove of a particle trap, wherein the groove is laterally offset from the particle aperture such that the groove and the particle aperture do not overlap parallel to an optical axis of the first component, and further wherein the particle trap comprises an annular groove defined by a floor, an inner wall and an outer wall, wherein the outer wall is angled with respect to the optical axis such that the top of the outer wall is farther away from the inner wall than the bottom of the outer wall; andretaining the one or more particles with a particle getter disposed on the particle trap. 18. A method according to claim 17, wherein the first component includes a lens carrier and the second component includes a guide member, and wherein the moving includes moving the lens carrier in an autofocus operation of the camera module. 19. A method according to claim 17, wherein the generating operation includes a portion of the first component in contact with the second component during the moving operation, wherein a particle produced during the generating operation includes a portion of one of the first component and second component sheared during the moving.
Meehan, Michael F.; Taub, David G.; Galburt, Daniel N., Apparatus, system, and method for precision positioning and alignment of a lens in an optical system.
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Segawa,Masao; Ooishi,Michiko; Karasawa,Jun; Sasaki,Tomoyuki; Asaga,Jun, Image pickup apparatus, method of making, and electric apparatus having image pickup apparatus.
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