Appl Opt. 2020 Aug 1;59(22):G79-G91. doi: 10.1364/AO.393088.
A multi-resolution foveated laparoscope (MRFL) with autofocus and zooming capabilities was previously designed to address the limiting trade-off between spatial resolution and field of view during laparoscopic minimally invasive surgery. The MRFL splits incoming light into two paths enabling simultaneous capture of the full surgical field and a zoomed-in view of the local surgical site. A fully functional prototype was constructed to demonstrate and test the autofocus, zooming capabilities, and clinical utility of this new laparoscope. The test of the prototype in both dry lab and animal models was successful, but it also revealed several major limitations of the prototype. In this paper, we present a brief overview of the aforementioned MRFL prototype design and results, and the shortcomings associated with its optical and mechanical designs. We then present several methods to address the shortcomings of the existing prototype with a modified optical layout and redesigned mechanics. The performances of the new and old system prototypes are comparatively analyzed in accordance with the design goals of the new MRFL. Finally, we present and demonstrate a real-time digital method for correcting transverse chromatic aberration to further improve the overall image quality, which can be adapted to future MRFL systems.
一种具有自动对焦和缩放功能的多分辨率注视腹腔镜（MRFL），之前被设计用于解决腹腔镜微创手术中空间分辨率和视野之间的限制权衡问题。MRFL 将入射光分成两条路径，能够同时捕获整个手术区域和局部手术部位的放大视图。已经构建了一个全功能原型，以演示和测试这种新型腹腔镜的自动对焦、缩放功能和临床实用性。该原型在干式实验室和动物模型中的测试均取得了成功，但也揭示了该原型的几个主要局限性。在本文中，我们简要介绍了上述 MRFL 原型设计和结果，以及与其光学和机械设计相关的缺点。然后，我们提出了几种方法来通过修改光学布局和重新设计机械结构来解决现有原型的缺点。根据新的 MRFL 的设计目标，对新旧系统原型的性能进行了比较分析。最后，我们提出并演示了一种实时数字方法来校正横向色差，以进一步提高整体图像质量，该方法可适用于未来的 MRFL 系统。
