Camera lens carrier for circuit board mounting

• US 6,654,187 B2
• Filed: 07/16/2001
• Issued: 11/25/2003
• Est. Priority Date: 07/16/2001
• Status: Expired due to Fees

• Current Assignee: Alex Ning
• Original Assignee: Alex Ning
• Inventors: Ning, Alex
• Primary Examiner(s): Schwartz, Jordan M.
• Assistant Examiner(s): Stultz, Jessica
• Application Number:
  US09/906,871
• Publication Number:
  US 20030011903A1
• Time in Patent Office: 862 Days
• Field of Search: 359/819, 359/822, 359/823
• US Class Current: 359/823
• CPC Class Codes: G02B 7/02 for lenses supports for magnifying lenses G02B25/002
• CPC Class Codes: H01L 31/0203 Containers; Encapsulations , e.g. encapsulation of photodiodesfor photovoltaic devices H01L31/048; for organic photosensitive devices H10K30/80
• CPC Class Codes: H01L 31/02325 the optical elements not being integrated nor being directly associated with the device
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof
• CPC Class Codes: H04N 23/57 Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices

Abstract

A lens carrier for operative engagement of a camera lens with an image sensor such as a Charge Coupled Device or CMOS device. The lens mounts in a lens barrel on the lens carrier and may be laterally translated along the lens barrel to focus the image projected by the lens on an adjacent image sensor. The lens carrier also provides for self centering of the center axis of the lens with the center point on the imaging surface of the image sensor and for a perpendicular alignment of the lens center axis with the imaging surface to achieve the best conversion of the visual image from the lens into analog or digital format for use by electric devices.

Claims

1. A lens carrier for use in combination with an electronic image sensor attached to an electronic circuit board, comprising;

a lens carrier;

said lens carrier having a base said base having a top surface and a bottom surface;

an elongated lens barrel having an upper end and having a lower end attached to said base;

said lens barrel having an axial passage communicating therethrough from said upper end through said bottom surface of said base;

said axial passage having a center axis therethrough and an interior wall dimensioned for cooperative engagement with the exterior of a lens;

means to focus the image projected by said lens when cooperatively engaged in said axial passage, upon an imaging surface located on an image sensor;

means for cooperative engagement of said lens carrier with said image sensor with said center axis of said axial passage substantially perpendicular said imaging surface on said image sensor;

said means for cooperative engagement of said lens carrier with said image sensor provided by a recess in said bottom surface of said base, said recess defined by a top wall and sidewalls;

said top wall being substantially perpendicular to said center axis of said barrel; and

said recess dimensioned to operationally engage the perimeter of said image sensor with said top wall positioned against a substantially flat ledge adjacent to at least two sides of said imaging surface.

2. The lens carrier as defined in claim 1 wherein said image sensor is one of a group of image sensors including a Charge Coupled Device and a CMOS device.

3. The lens carrier as defined in claim 1 additionally comprising:

said imaging surface having a center point thereon; and

means for alignment of said center axis of said barrel with said center point.

4. The lens carrier as defined in claim 1 additionally comprising:

said imaging surface having a center point thereon; and

means for alignment of said center axis of said barrel with said center point.

5. The lens carrier as defined in claim 4 wherein said means for alignment of said center axis of said barrel with said center point comprises:

at least two flexible clips extending from said bottom surface of said base on opposite sides of said base, said flexible clips each requiring a substantially equal amount of force to deflect said clips;

said clips having an attachment end attached to said base and a distal end; and

means of cooperative engagement of said distal end of said clips with said image sensor, whereby said clips cooperatively engage said lens carrier with said image sensor and said clips deflect the center axis of said barrel substantially in line with said center point.

6. The lens carrier as defined in claim 5 additionally comprising:

notches in said side walls adjacent to said clips; and

said clips deflectable into said notches during mounting of said lens carrier to said image sensor.

7. The lens carrier as defined in claim 1 wherein said means to focus the image projected by said lens when cooperatively engaged in said axial passage, upon an imaging surface located on an image sensor comprises threads on the outside of said ions threadably engageable with threads on said interior wall of said axial passage.

8. The lens carrier as defined in claim 4 wherein said means to focus the image projected by said lens when cooperatively engaged in said axial passage, upon an imaging surface located on an image sensor comprises threads on the outside of said lens threadably engageable with threads on said interior wall of said axial passage.

9. The lens carrier as defined in claim 6 wherein said means to focus the image projected by said lens when cooperatively engaged in said axial passage, upon an imaging surface located on an image sensor comprises threads on the outside of said lens threadably engageable with threads on said interior wall of said axial passage.

10. A lens carrier for use in combination with an electronic image sensor attached to an electronic circuit board, comprising:

a lens carrier;

said lens carrier having a base said base having a top surface and a bottom surface;

an elongated lens barrel having an upper end and having a lower end attached to said base;

said lens barrel having an axial passage communicating therethrough from said upper end through said bottom surface of said base;

said axial passage having a center axis therethrough and an interior wall dimensioned for cooperative engagement with the exterior of a lens;

means to focus the image projected by said lens when cooperatively engaged in said axial passage, upon an imaging surface located on an image sensor;

means for cooperative engagement of said lens carrier with said image sensor with said center axis of said axial passage substantially perpendicular said imaging surface on said image sensor;

said image sensor is operatively mounted in a chip carrier which is mounted to a circuit board, said chip carrier having a carrier ledge thereon adjacent to said image sensor and substantially parallel to the imaging surface of said image sensor when said image sensor is mounted in said chip carrier;

said means for cooperative engagement of said lens carrier with said image sensor defined by a recess in said bottom surface of said base, said recess defined by a top wall and sidewalls;

said top wall being substantially perpendicular to said center axis of said barrel; and

said recess dimensioned to operationally engage the perimeter of said image sensor mounted in said chip carrier with said top wall positioned against said carrier ledge.

11. The lens carrier as defined in claim 10 additionally comprising:

said imaging surface having a center point thereon; and

means for alignment of said center axis of said barrel with said center point.

12. The lens carrier as defined in claim 11 wherein said means for alignment of said center axis of said barrel with said center point comprises:

at least two flexible clips extending from said bottom surface of said base on opposite sides of said base, said flexible clips each requiring a substantially equal amount of force to deflect said clips;

said clips having an attachment end attached to said base and a distal end; and

means of cooperative engagement of said distal end of said clips with said chip carrier whereby said clips cooperatively engage said lens carrier with said image sensor and said clips deflect the center axis of said barrel substantially in line with said center point.

13. The lens carrier as defined in claim 12 additionally comprising:

notches in said side walls adjacent to said clips; and

said clips deflectable into said notches during mounting of said lens carrier to said image sensor.

14. The lens carrier as defined in claim 11 wherein said means to focus the image projected by said lens when cooperatively engaged in said axial passage, upon an imaging surface located on an image sensor comprises threads on the outside of said lens threadably engageable with threads on said interior wall of said axial passage.

15. The lens carrier as defined in claim 13 wherein said means to focus the image projected by said lens when cooperatively engaged in said axial passage, upon an imaging surface located on an image sensor comprises threads on the outside of said lens threadably engageable with threads on said interior wall of each axial passage.

16. A lens carrier assembly for use in combination with an electronic image sensor attached to an electronic circuit board, comprising

a lens carrier;

said lens carrier having a base said base having a top surface and a bottom surface;

an elongated lens barrel having an upper end and having a lower end attached to said base;

said lens barrel having an axial passage communicating therethrough from said upper end through said bottom surface of said base;

said axial passage having a center axis therethrough and an interior wall dimensioned for cooperative engagement with the exterior of a lens;

a chip carrier having a mount for an image sensor thereon;

said lens carrier adapted for direct engagement upon said chip carrier;

said direct engagement between said chip carrier and said lens carrier thereby positioning said center axis of said axial passage substantially perpendicular to said imaging surface on said image sensor; and

means to focus the image projected by said lens when cooperatively engaged in said axial passage, upon an imaging surface located on said image sensor.

17. The lens carrier assembly as defined in claim 16 additionally comprising:

said imaging surface having a center point thereon; and

means for alignment of said center axis of said barrel with said center point.

18. The lens carrier assembly as defined in claim 17 wherein said means for alignment of said center axis of said barrel with said center point comprises:

at least two flexible clips extending from said bottom surface of said base on opposite sides of said base, said flexible clips each requiring a substantially equal amount of force to deflect said clips;

said clips having an attachment end attached to said base and a distal end; and

means of cooperative engagement of said distal end of said clips with said chip carrier, whereby said clips cooperatively engage said chip carrier and also deflect the center axis of said barrel substantially in line with said center point.

19. The lens carrier as defined in claim 17 wherein said means for alignment of said center axis of said barrel with said center point comprises;

at least four flexible clips extending from said bottom surface of said base on four opposing side positions of said base, said flexible clips each requiring a substantially equal amount of force to deflect said clips;

said clips having an attachment end attached to said base and a distal end; and

means of cooperative engagement of said distal end of said clips with one of said image sensor or said chip carrier; and

said clips deflecting the center axis of said barrel substantially in line with said center point.