Optical Design Of Microscopic Imaging System For Digital Slit-lamp

Slit-lamp microscope is widely used in the field of Optometry. With the continuous improvement of digital imaging technique, computer technique and image processing technique, slit-lamp microscope technique is vigorously promoting, Varieties of slit-lamp microscopes emerge in endlessly. One of the traditional slit-lamp drawbacks is that it can be only observed with our eyes, prolonged observation will bring visual fatigue. The other one is that the resolution is low, affecting diagnosis. However, due to the advantages of dynamic observation with computer, fast image capturing, information storing at any time and accurate diagnosis of diseased tissue and so on, digital slit-lamp microscope has became a hot spot in microscope researches.In order to improve the resolution, this thesis use the way of Parallel Galileo telescope system to design a digital slit-lamp microscope with 5-step magnifications and built-in CCD. The main work is shown below:1、According to the imaging principle of digital slit-lamp microscope system, the whole system is divided into front lenses, Galileo telescope system and photographic lenses. And the optical properties of three structures are studied.2、The magnification and the design specifications for each configuration of the 5-step magnifications system are deduced, thus determines the entire optical system dimensions.3、The 5-step magnifications system is designed with Zemax multiple structure. At first, we regard the optical system as a coaxial system and optimize it. Then we move the axis of Galileo system along the Y direction to realize non-coaxial optimal design when the coaxial systems achieve good performance.