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Near-infrared fundus camera design

Author: HuangYang
Tutor: GaoZhiShan
School: Nanjing University of Technology and Engineering
Course: Optical Engineering
Keywords: Fundus camera Near-infrared light ZEMAX Imaging optical path Illumination optical path Tolerance Analysis
CLC: TH786
Type: Master's thesis
Year: 2011
Downloads: 98
Quote: 0
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Abstract


Fundus camera (Fundus Camera) has a simple structure , image intuitive and strong and high reliability , and clinical medicine on the detection of patients with fundus become one of the main instruments . With the continuous development of modern science , optometry and ophthalmology fundus imaging technology put forward higher requirements, fundus camera has also been given a new application and mission . On the basis of in-depth understanding of the works of traditional fundus camera , combined with the structural and optical properties of the human eye , select a near-infrared light source for illumination and imaging of the fundus . Then, using the ideal optical properties like relationship established a paraxial model of the optical path of the fundus camera imaging , and the movement amount is calculated using internal focusing -10D ~ 10D diopter eye imaging focusing mirror , and can be seen from the focusing curve the approximate linear focus . Finally, using ZEMAX software simulation of the fundus camera imaging optical path of based on LIOU eye models , the depth of field is 120μm, and the resolution is about 7μm, basically meet the imaging requirements . Analyze and solve the illumination optical path of the imaging quality impact factors , fundus camera illumination the paraxial optical path model , and then calculated the illumination optical path simulation using ZEMAX software . Finally, on the basis of the completion of the optical path design , each of the optical parts of the near infrared retinal camera completed sets of templates, and a process of tolerance analysis , and optical parts diagram drawn according to the national standards , for the production and processing .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Instruments, meters > Medical and health devices > Ophthalmic equipment
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