Strother James A
Dept. of Biology, Whitney Laboratory for Marine Bioscience, University of Florida, FL 32080, USA.
Biomed Opt Express. 2021 May 19;12(6):3530-3552. doi: 10.1364/BOE.422936. eCollection 2021 Jun 1.
Optical systems with integrated tunable lenses allow for rapid axial-scanning without mechanical translation of the components. However, changing the power of the tunable lens typically upsets aberration balancing across the system, introducing spherical and chromatic aberrations that limit the usable axial range. This study develops an analytical approximation for the tuning-induced spherical and axial chromatic aberration of a general optical system containing a tunable lens element. The resulting model indicates that systems can be simultaneously corrected for both tuning-induced spherical and chromatic aberrations by controlling the lateral magnification, coma, and pupil lateral color prior to the tunable surface. These insights are then used to design a realizable axial-scanning microscope system with a high numerical aperture and diffraction-limited performance over a wide field of view and deep axial range.
具有集成可调透镜的光学系统允许进行快速轴向扫描，而无需组件的机械平移。然而，改变可调透镜的焦度通常会破坏整个系统的像差平衡，引入球差和色差，从而限制了可用的轴向范围。本研究针对包含可调透镜元件的一般光学系统，开发了一种关于调谐引起的球差和轴向色差的解析近似方法。所得模型表明，通过在可调表面之前控制横向放大率、彗差和光瞳横向色差，可以同时校正系统中由调谐引起的球差和色差。然后，利用这些见解设计了一种可实现的轴向扫描显微镜系统，该系统在宽视场和深轴向范围内具有高数值孔径和衍射极限性能。
