AI Article Synopsis
- Most current imaging techniques for the cornea have limitations due to their narrow field of view, primarily using point, slit, or annular scanning methods.
- Achieving a larger field of view is challenging because of the human eyeball's convex shape, necessitating the use of advanced optical solutions derived from Seidel aberration theory.
- A newly optimized three-mirror design allows for high-resolution, off-axis imaging of the entire cornea and sclera in a single snapshot, with a potential for mass production due to its monolithic structure.
Article Abstract
Most existing techniques that are typically used by specialists to image the cornea are based on point, slit, or annular scanning due to a narrow field of view. The difficulty in achieving a larger field of view comes from the convex shape of the human eyeball. Field curvature for a refractive imaging system with positive power is typically negative and thus a concave image surface. In order to view the full cornea and sclera with snapshot imaging, we calculate qualified two- and three-mirror solutions from Seidel aberration theory. A three-mirror solution is further optimized as a high-resolution off-axis imaging system using freeform surfaces, which can obtain a full-field tailored image shell without scanning. The lateral resolution on the cornea is about 10 μm with good modulation transfer function (MTF) and spot performance. To ease the assembly, a monolithic design is achieved with slightly lower resolution, leading to a potential mass production solution.
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| http://dx.doi.org/10.1364/AO.56.005630 | DOI Listing |
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