Sunny Optical Technology (Group) has been granted a patent for a method of assembling a camera module. The method involves preparing sub-lens assemblies and a photosensitive assembly, arranging the sub-lens assemblies to form an optical system, adjusting their relative position to improve resolution and image plane inclination, and connecting them. The invention aims to enhance the imaging capabilities of camera modules. GlobalData’s report on Sunny Optical Technology (Group) gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Sunny Optical Technology (Group), Under-screen biometric identification was a key innovation area identified from patents. Sunny Optical Technology (Group)'s grant share as of September 2023 was 41%. Grant share is based on the ratio of number of grants to total number of patents.
Method for assembling a camera module to improve imaging resolution
A recently granted patent (Publication Number: US11774698B2) describes a method for assembling a camera module that aims to improve the resolution and image plane inclination of the optical system. The method involves preparing a first sub-lens assembly and a second sub-assembly, where the first sub-lens assembly includes a lens barrel and at least one lens, and the second sub-assembly consists of a lens barrel, at least one lens, and a photosensitive element. The first sub-lens assembly is arranged on the optical axis of the second sub-lens assembly to form an imaging optical system.
To enhance the resolution and decrease the image plane inclination, the relative position of the first sub-lens assembly with respect to the second sub-lens assembly is adjusted. This adjustment is achieved by moving the first sub-lens assembly in an adjustment plane, increasing the resolution of the optical system in a reference field to a specific threshold. The adjustment may involve translation and/or rotation in the adjustment plane, as well as adjusting the angle of the first sub-lens assembly's axis with respect to the second sub-lens assembly's axis.
Once the desired resolution and image plane inclination are achieved, the first sub-lens assembly and the second sub-lens assembly are connected using a bonding or welding process, such as laser welding or ultrasonic welding. The connection ensures that the relative position of the two sub-assemblies remains unchanged.
The patent also describes a camera module resulting from this assembly method. The camera module includes the first sub-lens assembly and the second sub-assembly, which are fixed together using a connecting medium. The connecting medium causes the central axis of the first sub-lens assembly to have a slight inclination and stagger with respect to the central axis of the second sub-lens assembly. The angle of inclination is less than 0.5°, and there is a structural clearance between the two sub-lens assemblies.
Overall, this patent presents a method for assembling a camera module that improves resolution and image plane inclination. By adjusting the relative position of the sub-lens assemblies and using a connecting medium, the resulting camera module achieves higher image quality and accuracy.
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