Abstract
Most image sensors are flat and made by hard material, but the focal surface of a single lens system is a curvy surface. There are gaps between the flat sensor surface and the focal surface. The flat shape image sensor brings the problem of aberration of off-axial image when the image through a lens, because of the error gaps between of focal surface and flat sensor. One needs multiple individual lenses for aberration correction, that cause the lens module cannot be compact. For resolving the above issues, it motives the study of liquid lens and flexible sensor system. The previous researches include mockup sample of liquid-filled lens optical module, studies of image effects of gravity, number of flow channel, liquid pressure and zoom function. This research is guided by human eyes structure, based on a simple structure of a liquid-filled lens and a flexible sensor membrane to process the optical module analysis. The research focused on the deformation of liquid- filled lens and sensor membrane, optical characters and the relation of optical compensation. The optical integrated module has compensation function between lens and sensor membrane, and obtains a clear image under different internal pressure. For matching the optical characters of lens, required shape variations of flexible image sensors were studied. The critical parameters include diameter, thickness, Young’s modulus of membrane, and internal pressure of lens chamber. The flexible sensor membrane installs image sensor chips on flexible membrane substrate, and applied wire bounding technology to group all chips together. For a single lens optical system, the curvy sensor membrane has better performance than flat type sensor in the image quality of MTF, aberration and angle of view. The research can be applied in the fields of the adapter lens system of digital camera, disposal medical optical accessory, security optical devices and self-compensation optical system, etc.