The Study of Virtual Projection Vision Detecting Device Combine with Button Operation

• Main Authors: Yu Lee, 李昱
• Other Authors: Sheng-Hsiung Chang
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/6mucvr

碩士 === 南臺科技大學 === 光電工程系 === 107 === Because of the proportion of myopia in Taiwan increase year by year, and the age of myopia is gradually younger, we are thinking about what kind of devices that can assist or even improvement optometry device nowadays better, with this study, we believe it can make outstanding contributions in the optometry industry. In this experiment we use Fresnel lenses, reflectors, programmed wafers and analog sticks, then constitute into interactive virtual imaging vision detecting device, using a principle that similar to heads up display, combine with virtual image’s projection distance advantage and use analog sticks as direction input device. The difference between vision Detecting Device nowadays is projection distance, according to the optometry medical regulations, the distance between patients and test graphics must be 5 to 6 meters, but with this study, we can use virtual imaging principle to effectively save the space that used to need, let us do more things in the limited space, and different from the past, we used to need medical personnel assist in measurement, this study use program to calculate our vision, it can reduce the measurement error caused by man-made, The biggest advantage is that the price of optometry device nowadays is more than 100,000 dollar, and our device cost only about 30,000, it can decrease the cost effectively. Keywords: Virtual imaging principle, Fresnel lens, Vision testing