Double Folded Tele Camera Layout for Large Sensors and Low F/#

The patent employs double optical path folding using two optical path folding elements (OPFEs) to redirect light at approximately 45-degree angles, effectively transforming the linear optical path into a folded configuration. This dimensional transformation allows the optical axis to traverse a longer distance within a compact module height, accommodating larger image sensors while maintaining a slim profile. The first OPFE folds the optical path from a first direction to a second direction, and the second OPFE further folds it to a third direction, creating a compact three-dimensional arrangement that resolves the contradiction between module height and image sensor size.

The double optical path folding mechanism enables the optical system to achieve a longer effective focal length and larger aperture diameter within a compact module height by utilizing three-dimensional spatial arrangement. The folded optical path allows light to traverse a longer distance and pass through a larger aperture, achieving low f/# values that improve low light sensitivity and Bokeh effect while maintaining a slim camera module design.

The patent's double optical path folding design allows for a longer optical path length within a compact module height, enabling the use of lenses with more elements and higher precision optical designs. The folded configuration provides sufficient space for complex lens assemblies that can achieve high image resolution, while the compact three-dimensional arrangement maintains a slim module height. The optical path folding elements are positioned to minimize aberrations and maintain image quality throughout the folded path.