Inspecting system for lens module

An inspecting system for inspecting a lens module includes an inspection device; and a transmitting and loading device. The transmitting and loading device includes a grasping assembly, a supporting assembly, a sliding assembly loaded on the supporting assembly, and a control unit for controlling the grasping assembly and the sliding assembly. The grasping assembly is configured to clamp the lens module and to load the lens module on the sliding assembly, and the sliding assembly is adapted to transfer the lens module to a testing position of the inspection device.

BACKGROUND

1. Technical Field

The present disclosure relates to inspecting systems, particularly to an inspecting system for lens module.

2. Description of Related Art

A lens module typically includes two lenses. The imaging quality of each of the two lenses of the lens module needs to be inspected by an inspecting system. The lens module for inspection needs to be transferred and loaded on a testing position of the inspecting system by an operator. The imaging quality of each of the two lenses is to be investigated by adjusting the distance between each of the two lenses of the lens module. A pattern is to be imaged and investigated to obtain the modulation transfer function of each of the two lenses. After one of the two lenses of the lens module has been inspected, the lens module is rotated 180° by the operator to inspect another one of the two lenses of the lens module. However, because the lens module is transferred or loaded by the operator in the process of inspecting the lens module, the inspecting efficiency of the lens module is low, and the lens module may be contaminated during the inspecting process.

Therefore, there is room for improvement in the art.

DETAILED DESCRIPTION

A first embodiment of an inspecting system100is shown inFIG. 1. The inspecting system100is used for inspecting the imaging quality of a lens module10. The lens module10includes a base board12and two lenses14fixed on the base board12adjacent to opposite ends of the base board12. In the illustrated embodiment, the base board12is substantially flat, and the two lenses14are fixed to the same surface of the base board12.

The inspecting system100includes an inspection device30and a transmitting and loading device50for transmitting the lens modules10. The inspection device30includes a housing31, a light source32, a diffusion plate34, a testing board36, and an image sensor38. The housing31includes a bottom board312, a top board314parallel to the bottom board312, and a sidewall316interconnecting the ends of the bottom board312and the top board314. The bottom board312, the top board314, and the sidewall316cooperatively form a receiving space with an opening318. In the illustrated embodiment, the light source32, the diffusion plate34, the testing board36, and the image sensor38are successively received in the housing31.

The light source32is positioned on the bottom board312, the diffusion plate34is disposed above the light source32, and the testing board36is disposed above the diffusion plate34. The image sensor38is fixed to an inner surface of the top board314facing the testing board36. The diffusion plate34is a light guide plate made of organic glass. The testing board36forms a pattern362at about the center portion of the testing board36. The light transmitted by the light source32is turn into a surface light source from a point light source by the diffusion plate34and irradiates on the pattern362of the testing board36. The image sensor38is used to sense the image formed by the pattern362passing through each of the two lenses14of the lens module10to be inspected. In the illustrated embodiment, the imaging quality of each of the two lenses14is to be investigated by adjusting the distance between each of the two lenses14and the pattern362and investigating the modulation transfer function of each of the two lenses14.

The inspection device30further includes a position sensor39fastened to the inner surface of the sidewall31. In the illustrated embodiment, the position sensor39is a laser inspector, and is used for inspecting whether each of the two lenses14to be inspected is in a testing position. The position sensor39is fixed to the sidewall at a same level with the testing position.

The transmitting and loading device50includes a grasping assembly502, a supporting assembly503, a sliding assembly504loaded on the supporting assembly503, and a control unit506for controlling the grasping assembly502and the sliding assembly504. In the illustrated embodiment, the grasping assembly502of the transmitting and loading device50is a robot with a mechanical arm having a clamping mechanism.

The grasping assembly502is used to clamp one of the lens module10and load the lens module10on the sliding assembly504. The lens module10is transferred to the testing position by the sliding assembly504. The grasping assembly502includes a mechanical arm5022electrically connected to the control unit506and two grasping claws5024formed at an end of the mechanical arm5022. The control unit506is capable of controlling the mechanical arm5022to move to clamp two of the lens modules10. In the illustrated embodiment, each of the two grasping claws5024is made of polyetheretherketone (PEK). The PEK has a high melting point for high temperature resistance, relatively excellent wear resistance, and relatively excellent mechanical property, especially proper hardness to firmly grasp the lens module10without damage.

The sliding assembly504includes a sliding guide5042, a sliding member5044slidably disposed on the sliding guide5042, and a rotating shaft5046rotatably connected to an end of the sliding member5044away from the sliding guide5042, adjacent to the inspection device30. The rotating shaft5046forms a mounting portion5048at a distal end thereof away from the sliding guide5042.

In use, the control unit506controls the sliding assembly504to slide on one end of the sliding guide5042adjacent to the grasping assembly502, the mechanical arm5022drives the grasping claws5024to grasp the lens modules10and load the lens modules10on the mounting portion5048of the rotating shaft5046. In the illustrated embodiment, the two lenses14of the lens module10are symmetrical with the rotating shaft5046. The sliding assembly504slides on the other end of the sliding guide5042away from the grasping assembly502. At this time, one of the two lenses14is loaded above the pattern362and on the testing position of the inspection device30. The inspection device30inspects each of the two lenses14loaded on testing position when the position sensor39senses each of the two lenses14loaded on the testing position of the inspection device30. After one of the two lenses14of the lens module10has been inspected, the control unit506controls the rotating shaft5046to rotate 180°, and the inspecting device30can inspect the other one of the two lenses14of the lens module10.

After the two lenses14of the lens module10have been inspected, the control unit506controls the sliding assembly504to slide on the end of the sliding guide5042adjacent to the grasping assembly502. The grasping assembly502unloads the lens module10having been inspected and loads another one of the lens module10on the mounting portion5048of the rotating shaft5046, which can achieve continuous test of the lens module10.

Referring toFIG. 2, a second embodiment of the inspecting system100is similar to the first embodiment of the inspecting system100, except that the second embodiment of the inspecting system100includes a testing tray70for holding a plurality of the lens modules10. In testing, the plurality of lens modules10are loaded in the testing tray70in a matrix-like manner, and the testing tray70is loaded at the mounting portion5048of the rotating shaft5046. The control unit506controls the horizontal movement of the rotating shaft5046to satisfy the continuous test of the lens modules10.