| As a new type of image information display, the glasses micro- type displays have great advantages to provide a comprehensive picture of information, It not only as a personal display applications, but also as a foundation of large-screen projection system, due to the rapid development and popularization of flat panel display, The glasses micro-displays have overcame large degree on the weight,size,high power,high-voltage and other disadvantageousness, so the prospects of application will broader, because of its large screen,portable,do not need to handheld,experience the visual image's Changing, and other characteristics, Tt has been widely used in military, entertainment, medical, engineering and simulation training and other fields.The properties of plastic lens applied in glasses micro- type displays were studied and a Polymethyl methacrylate (PMMA) optical system for glasses-type displays was presented. By using a reflector, the beam path of the system is folded, which lead to a compact structure. A binary optical element is introduced into the system to effectively correct the chromatic aberration and wavefront aberration. The imaging quality is improved, at the same time system size and weight is greatly reduced. The total weigh of the optical system is just 9.8g, the astigmatic and lateral color which need to correct in visual system are 0.31mm and 8.8μm respectively, and the distortion is less than 7%. The full field of view is 32°and the angular resolution is 0.8 mrad. |
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