Optical testing apparatus and testing method thereof

An optical testing apparatus for testing the quality of an imaging module of an electronic device, the imaging module comprising a lens module and an image sensor, the image sensor qualified at a predetermined temperature higher than ambient temperature, the lens module required to be tested by the optical testing apparatus, the optical testing apparatus comprising:

• a projector directly facing with the lens module, the projection, the lens module and the image sensor aligning in a line, the projector for projecting images on the lens module for the lens module to capture;
• a temperature control device made of opaque material and sealing an inside space completely from an outside, the projector and the imaging module being received in the inside space, the projector attached on an inside wall of the temperature control device, the temperature control device including a temperature adjuster and a temperature indicator, the temperature adjuster adjusting the ambient temperature and the temperature indicator showing the actual temperature of the lens module;
• a processor electronically connected to the image sensor;
• a controller electronically connected to the image sensor and controlling the imaging module to capture image and transmitting the captured image to the processor when the temperature indicator displaying the actual temperature of the lens module to reach the predetermined temperature, the processor configured for processing the captured image to determine the quality of the imaging module required to be tested.