Hybrid Aspherical Liquid-Tunable Optical Systems

混合非球面液体可调谐光学系统

• 批准号: 387039910
• 负责人: Professor Dr. Caglar Ataman
• 金额: --
• 依托单位: Institut für Mikrosystemtechnik (IMTEK)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/387039910?language=en
• 关键词: Hybrid; Aspherical; Liquid; Tunable; Optical

In contrast to the immense progress made in software and electronics, optical system design and implementation essentially follows the traditional methods, predominantly due the ongoing reliance on conventional optical components. HALOs long term vision is to transform optical system design by providing a systematic method to design and manufacture sophisticated optical components capable of effective aberration control without resorting to complex multi-element designs. Specifically, HALO aims to develop a novel liquid-tunable, achromatic and aspherical lens driven by an integrated electrostatic actuator and demonstrate its versatility through an innovative imaging system. Compared to conventional imaging systems that require numerous lenses to control aberrations, the HALO system will comprise a single tunable lens and an image sensor. This single lens will feature a tunable aspherical refractive surface and a diffractive surface in order to control spherical and chromatic aberrations over a large focal length range, respectively. By combining this novel component with state-of-the-art image processing techniques, HALO aims to develop a versatile imaging technology both in terms of system design and its practical implementation, such that its potential impact is maximized. HALOs success will rest on the following pillars of scientific and technical achievements:– A reliable method to design spherical and chromatic aberration-free tunable lenses.– Development of an on-chip actuator monolithically integrated with the tunable-lens – A robust and high-yield fabrication process for monolithic wafer-level manufacturing– A single-lens imaging system with real-time numerical field-curvature correction through focal length tuningIn HALO, we aim to develop a new approach to tunable lens design to address all these issues following an integrated approach, enabled by state-of-the-art microfabrication techniques. This choice follows the objective of realizing the above-listed innovations in a device of real practical use. Endoscopic imaging and advanced imaging systems for consumer electronics are envisioned to be primary focus of the HALO lens. By transferring as much hardware complexity as possible into efficient computational methods, HALO aims to attain state-of-the-art imaging performance with a single lens. Since field curvature correction is the foremost source of such complexity for modern imaging systems, we will exploit the unique aberration-free focal length tuning capability of the HALO lens to dynamically adapt the focal plane during exposure, such that separate images with optimum focus at different radial positions are recorded. A digital combination of these images will provide an image without field-curvature. The imaging system concept to be designed around the tunable lens will act as a demonstrator, showcasing the versatility that such a component would bring into optical system design.

与软件和电子技术取得的巨大进步相比，光学系统的设计和实现基本上遵循传统方法，主要是由于对传统光学元件的持续依赖。HALO的长期愿景是通过提供一种系统的方法来设计和制造能够有效控制像差的复杂光学元件，而无需采用复杂的多元件设计，从而改变光学系统的设计。具体来说，HALO旨在开发一种新型的液体可调，消色差和非球面透镜驱动的集成静电致动器，并通过创新的成像系统展示其多功能性。与需要多个透镜来控制像差的常规成像系统相比，HALO系统将包括单个可调谐透镜和图像传感器。这种单透镜将具有可调非球面折射表面和衍射表面，以便分别在大焦距范围内控制球面像差和色差。通过将这一新组件与最先进的图像处理技术相结合，HALO旨在开发一种多功能成像技术，无论是在系统设计还是实际实施方面，都能最大限度地发挥其潜在影响。HALO的成功将依赖于以下几个科技成就的支柱：-一种可靠的方法来设计球面和色差自由可调透镜。-一个芯片上的致动器单片集成的可调透镜的发展-一个强大的和高产量的制造过程单片晶圆级制造-一个单透镜成像系统与实时数值场曲率校正通过焦距tuningIn HALO，我们的目标是开发一种新的方法来可调透镜设计，以解决所有这些问题后的综合方法，使国家的最先进的微加工技术。该选择遵循在真实的实际使用的装置中实现上述创新的目标。用于消费电子产品的内窥镜成像和先进成像系统被设想为HALO透镜的主要焦点。通过将尽可能多的硬件复杂性转化为有效的计算方法，HALO旨在用单个透镜获得最先进的成像性能。由于场曲校正是现代成像系统复杂性的首要来源，我们将利用HALO透镜独特的无像差焦距调节能力，在曝光过程中动态调整焦平面，从而记录在不同径向位置具有最佳焦点的单独图像。这些图像的数字组合将提供没有场弯曲的图像。围绕可调透镜设计的成像系统概念将作为演示器，展示这种组件将为光学系统设计带来的多功能性。