Sensors, Volume 24, Issue 23
December-1 2024 - 457 articles
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Cover Story: One of the fundamental factors determining a sensor’s ability to capture high-resolution images is its efficiency in focusing visible light onto the photosensitive region at the submicron scale. In most CMOS imaging technologies, this is typically achieved through using microlenses. Light collection under a diverse range of conditions can be significantly improved through the efficient design of microlenses. In this paper, we present a systematic approach to optimize the shape of CMOS microlenses through adjoint sensitivity analysis. A novel figure of merit is developed and incorporated into the optimization process to enhance light collection. The adjoint-assisted optimization framework presented here can be used further to accelerate the development of efficient optical devices that perform optical manipulation in compact imaging systems. View this paper 
