DEVICE AND METHOD FOR TESTING LENS MODULES

• US 20070279619A1
• Filed: 01/03/2007
• Published: 12/06/2007
• Est. Priority Date: 06/02/2006
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Chang, Keng-Ming
• Granted Patent: US 7,443,492 B2
• Time in Patent Office: Days
• US Class Current: 356/124
• CPC Class Codes: G01M 11/0207 Details of measuring devices
• CPC Class Codes: H04N 17/002 for television cameras

Abstract

A device and a method for testing lens modules are disclosed in accordance with a preferred embodiment. The device includes a testing platform, an image sensor, a light source assembly, and a turnplate. The testing platform defines a receiving opening for receiving the turnplate therein. The image sensor faces towards the receiving opening. The light source assembly is disposed at a side of the testing platform opposite to the image sensor. The light source assembly is aligned with respect to the image sensor. The light source assembly is configured for providing a testing specimen. The turnplate defines at least two through holes. Each through hole is configured for receiving the lens modules therein and being sequentially aligned with respect to the image sensor. The image sensor is configured for catching images of the testing specimen formed by the lens module in each through hole.

Claims

1. A device for testing lens modules, the device comprising:

a testing platform, the testing platform defining a receiving opening;

an image sensor facing towards the receiving opening;

a light source assembly disposed at a side of the testing platform opposite to the image sensor, the light source assembly being aligned with respect to the image sensor, the light source assembly being configured for providing predetermined testing specimens; and

a turnplate received in the receiving opening, the turnplate defining at least two through holes, each through hole being configured for receiving one lens module to be tested therein and being sequentially aligned with respect to the image sensor along with the rotation of the turnplate, the image sensor being configured for sequentially catching images of the testing specimen formed by the lens module in each through hole.

2. The device as claimed in claim 1, wherein the image sensor is movable with respect to the receiving opening along an axis of one through hole aligned with the image sensor.

3. The device as claimed in claim 1, further comprising two trays disposed on the testing plate, one tray being configured for receiving the lens modules to be tested, the other tray being configured for receiving the lens modules tested.

4. The device as claimed in claim 1, further comprising a moving assembly configured for moving the lens modules.

5. The device as claimed in claim 4, wherein the moving assembly comprises two robotic arms, one robotic arm being configured for carrying the lens modules to be tested to the through holes, the other robotic arm being configured for carrying away the lens modules tested from the through holes.

6. The device as claimed in claim 5, wherein each robotic arm comprises one of a robotic suction cup and a robotic claw.

7. The device as claimed in claim 1, wherein the at least two through holes comprises two through holes symmetrically defined in the turnplate with respect to an axis of the turnplate.

8. The device as claimed in claim 1, wherein the at least two through holes comprises three or more through holes uniformly distributed at an imaginary circle in the turnplate, the imaginary circle being concentric with respect to an axis of the turnplate.

9. The device as claimed in claim 1, wherein each through hole comprises a receiving cavity configured for accommodating the lens module to be tested therein and a light transmission through hole coaxially adjoining the receiving cavity, the light transmission aperture having a slight smaller diameter than the receiving cavity.

10. The device as claimed in claim 1, wherein the light transmission aperture is a trumpet-shaped void.

11. The device as claimed in claim 1, further comprising a driving motor configured for driving the turnplate to rotate along an axis thereof.

12. The device as claimed in claim 1, wherein the turnplate has plurality of gear teeth at a peripheral edge thereof, the driving motor comprising a gear engaged with the gear teeth of the turnplate.

13. The device as claimed in claim 1, further comprising an image processing system electrically connected to the image sensor.

14. A method for testing lens modules, the method comprising the steps of:

providing a device for testing the lens modules, the device comprising a testing platform defining a receiving opening;

an image sensor facing towards the receiving opening;

a light source assembly disposed at a side of the testing platform opposite to the image sensor, the light source assembly being aligned with respect to the image sensor, the light source assembly being configured for providing predetermined testing specimens; and

a turnplate received in the receiving opening, the turnplate defining at least two through holes configured for receiving lens modules to be tested;

sequentially receiving the lens modules to be tested into the at least two through holes and rotating the turnplate to cause the at least two through holes receiving the lens modules therein to face towards the image sensor one by one;

catching the image of the testing specimen formed by the lens modules in the through hole via the image sensor one by one; and

determining the testing result based on the image caught by the image sensor.

15. The method as claimed in claim 14, wherein the at least two through holes are alternately shifted to a testing position facing towards the image sensor by means of rotating the turnplate.

16. The method as claimed in claim 15, wherein one through hole is shifted to a testing position, another through hole being simultaneously shifted to a feed-in position, where each lens module to be tested is loaded into its respective through hole.

17. The method as claimed in claim 14, wherein the at least two through holes comprises three through holes, three steps of receiving a lens module to be tested, testing another lens module, and discharging still another lens module tested being simultaneously preformed in the three through holes, respectively.

18. The method as claimed in claim 17, wherein the three steps are alternately performed in each through hole along with the rotation of the turnplate.