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Open AccessArticle

Design of a High-Performance Digital Slit-Lamp Microscope with Five-Switched Zoom

1
Laboratory for Advanced Sensing Technology, Fujian Jiangxia University, Fuzhou 350108, China
2
Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou 350007, China
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2020, 10(8), 2757; https://doi.org/10.3390/app10082757
Received: 23 March 2020 / Revised: 8 April 2020 / Accepted: 13 April 2020 / Published: 16 April 2020
(This article belongs to the Section Optics and Lasers)
In this study, we design and present a five-fold digital slit-lamp microscope (DSLM) with built-in photographic lens and CCD. The initial structures of the front objective, Galilean telescope system, and photographic lens are systematically investigated and discussed in the design. A progressive optimization process is employed in the non-coaxial system design after the coaxial system achieves high performance. The analysis of spot diagrams and the modulation transfer function (MTF) show that this DSLM optical system achieves quasi-diffraction-limited performance and enables high-quality imaging for ophthalmic examination. Furthermore, tolerance analysis of this optical system is also performed, which provides a theoretical basis for machining and assembly. This design provides an idea for the design of a digital-zoom microscope in biomedical imaging instruments. View Full-Text
Keywords: optical design; digital slit-lamp microscope; non-coaxial system; tolerance analysis optical design; digital slit-lamp microscope; non-coaxial system; tolerance analysis
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MDPI and ACS Style

Huang, Y.; Chen, X.; Zhang, H.; Huang, S.; Lin, F. Design of a High-Performance Digital Slit-Lamp Microscope with Five-Switched Zoom. Appl. Sci. 2020, 10, 2757.

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