Object Detection Device Using Segmented Photodetector Matrix

The patent divides the detection task into multiple discrete photodetectors arranged in a matrix, where each photodetector handles a specific spatial segment. This segmentation eliminates the need for a single large elongated photodetector, thereby reducing voltage distribution issues and sensitivity variations while maintaining comprehensive detection coverage through the collective arrangement of multiple smaller detectors.

The patent introduces an imaging forming optical system as an intermediary between the reflected light and the photodetector array. This optical system condenses and directs light from different spatial layers onto corresponding photodetectors, enabling accurate depth discrimination without requiring each photodetector to individually detect multiple layers, thus improving detection accuracy while maintaining versatility.

The patent employs multiple smaller photodetectors arranged in a matrix rather than a single large photodetector. Each photodetector has a manageable light-receiving area that is easier to manufacture with uniform characteristics, while the collective array provides high detection resolution through spatial discrimination. This segmentation approach reduces manufacturing costs by avoiding the need for large-area uniform photodetectors while maintaining or improving resolution.

The patent transitions from using a single photodetector (one-dimensional detection) to a photodetector matrix (two-dimensional detection). This dimensional expansion allows the system to achieve high resolution in both horizontal and vertical directions simultaneously, while each individual photodetector maintains a small, easily manufacturable light-receiving area. The spatial arrangement in multiple dimensions provides the resolution benefit without requiring large individual detector areas.

The patent segments the light collection function across multiple photodetectors in a matrix arrangement. Instead of requiring each photodetector to have a large elongated light-receiving region, the system uses many smaller photodetectors whose combined active areas effectively cover the entire irradiated region. This segmentation maintains high light collection efficiency while keeping individual photodetector sizes manageable and easier to manufacture.

The patent combines the light-receiving functions of multiple small photodetectors to achieve the equivalent performance of a single large photodetector. By merging the detection capabilities of multiple smaller detectors arranged in a matrix, the system attains comprehensive light collection coverage without the manufacturing difficulties associated with producing large-area photodetectors. The collective response of the merged photodetector array provides efficient light collection while maintaining ease of manufacture.