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类型 基础研究 预答辩日期 2018-03-07
开始(开题)日期 2015-04-24 论文结束日期 2017-11-29
地点 论文选题来源 973、863项目     论文字数 5 (万字)
题目 XX用全息波导成像关键技术研究
主题词 全息波导,出瞳,衍射效率,曝光
摘要 XX能够将重要的飞行、作战信息显示在YY眼前,并叠加在前方外景信息上。同时,通过与瞄准线测量组件配合使用,YY无须驾驶FJ朝向目标即可离轴发射制导武器,实现“先敌发现、先敌攻击”。 受几何光学原理限制,传统的XX光学性能(出瞳、视场)提升是以增加光学系统的体积和重量为代价的。传统XX存在出瞳小、质量重等突出问题,在大过载机动时由于盔体滑动YY容易丢失信息,且颈部负担非常沉重。全息波导显示技术依靠波导光栅的衍射分光调制作用,实现光能的逐次衍射传输,既可以实现光学系统的轻量化和小型化,又能显著增大系统出瞳,是未来头盔显示技术的发展趋势。目前,全息波导头盔显示技术研究主要集中在小出瞳、单色显示领域,尚不能真正实现大出瞳显示,同时,单色显示也不利于缩短YY对关键信息的判读时间。本文研究对象为能够实现大出瞳显示的二维扩展型双色全息波导头盔显示关键技术,论文主要工作及成果如下: 首次以光强分布为主线,建立了全息波导二维扩展显示系统数学模型,并提出了基于光强分布的大出瞳显示性能评价方法。该模型首次明确了XX主要显示性能与系统物理参数之间的关系,为系统设计和元件制备提供了指导。 提出了全息波导光栅衍射角带宽拓展方法和显示连续性方程,为系统大视场显示和能量损耗提供了有效的解决方法。采用该拓展方法,可以将全息光栅衍射角带宽拓展3倍以上,满足系统大视场显示需求;同时,显示连续性方程可以解决边缘视场大角度衍射引起的“暗带”问题。 提出了等效波长设计方法,解决了光学设计软件不能直接用于全息波导XX光学系统设计的难题。该方法可以实现了准确的光线追迹,从而用于全息波导XX光学系统设计。给出了一红、绿双色全息波导XX光学系统设计实例。设计结果为:视场为30°(圆),出瞳Φ30mm。该设计结果与英国BAE公司Q-Sight 150相当。 提出了单光路曝光方法,实现了用同一激光器制作红、绿两种全息波导元件的目的。该方法既能解决全息记录材料对红光不感光的问题,又能够克服环境振动的影响。采用该方法,利用同一台氩离子激光器完成了红、绿两种全息波导元件的曝光。 针对全息波导元件衍射效率无法直接测试,且透过式测试精度低这一问题,提出了二次衍射测试方法,并设计了测试光路,对制作的全息波导元件进行了精确测量。 在本文理论研究的指导下,依托国防973项目,研制了全息波导XX双色原理样机,样机达到了国内领先水平。通过原理样机的出瞳、视场角等关键指标进行测试,验证了本文所述的系统数学模型、全息波导头盔显示光学系统设计方法以及全息波导元件曝光方法的正确性和合理性。
英文题目 KEY TECHNOLOGY RESEARCG ON WAVEGUIDE HOLOGRAPHIC IMAGING USED FOR ..DISPLAY
英文主题词 holographic waveguide, exit pupil, diffraction efficiency
英文摘要 XX can be used to project important information of flight and battlefield in front of the pilot and overlaid on the scene outside. Meanwhile, YY don’t have to fly the FJ point to the enemy planes before launching the off-Boresigt missiles assisted by the line of sight measurement components, so as to aim enemy planes and strike them earlier. According to the principle of geometric optics, the improvement of traditional XXs’ performance has to increase its weight and volume. Pilots have suffered from traditional XXs for a long time, owing to heavy burden on their necks result from XXs’ weight. In addition, pilots can’t get display information when overload maneuver result from the small exit pupil. Holographic waveguide display technology takes advantage of the successive diffractive light decomposed of holographic diffractive gratings, which can be used to flatten and lighten the optical system. It is the trend of XXs’ technology development in the future. However, the holographic waveguide XX technology is focus on small exit pupil and monochromatic at present, with the result that they can’t provide excellent XXs with larger exit pupil. In addition, it is not good for reducing pilots’ reaction time only by monochromatic symbol. The key technology research on larger exit pupil, bi-color holographic waveguide XX carried out in this thesis and the main work is as follows: The mathematical model of holographic waveguide XX was build centered by energy distribution on the exit pupil, and the performance evaluation method for large exit pupil display based on the intensity distribution was put forward. The relationship between system’s critical optical performance and parameters was identification. It can give good guidance for optical design and holographic waveguide exposure. A method for improving the angular width of holographic waveguide gratings was put forward, which figure out the problem of field of view. The angular width has been expand more than three times. In addation, the continuity equation which resolve the problem of energy dissipation was brought forward, and the black gap has been eliminated which result from large diffraction angles of margin light. The design approach called equivalent wavelength which can give a good solution for optical design software to trace light rays by rule and line was put forward. The accurate ray tracing was realized in this way. A design example of a bi-color optical system holographic XX used for displaying green and red information was presented. Its field of view is 30 degree (circular), and its exit pupil is Φ30mm. The design result of the system has a comparable level with BAE Q-Sight 150. Besides, a wavelength equivalent exposure method with a conjunct light path was put forward, and the exposure of red holographic waveguide element was achieved with the same argon laser. In this way, the problem that dichromate gelatin was not sensitive to red light was solved. Meanwhile, the vibration has no effect on gratings during its exposure. In order to solve the problem that the diffraction efficiency of the holographic waveguide element cannot be directly measured and the results of the transmission test were inaccurate, the secondary diffraction testing method was proposed. At last, the test optical path was designed and the test results were given, too. According to the guidance of theoretical research, a bi-color XX prototype has been developed, and the research has reached the leading level in China. After assembling and aligning, the typical performance, such as exit pupil, field of view and brightness were tested, which demonstrate the correctness and rationality of the system mathematical model, optical design method and the exposure method of holographic waveguide elements.
学术讨论
主办单位时间地点报告人报告主题
东南大学 2012.4.13 东南大学中山院 谢意 Sighting Display systems
613所 2012.11.15 613所 谢意 “‘双融双促’技术交流会”
613所 2013.6.5 613所 谢意 全息波导显示技术工作汇报
东南大学 2016.5.27 东南大学显示中心 谢意 彩色全息波导成像理论
东南大学 2017.11.24 东南大学显示中心 谢意 Holographic waveguide display
613所 2017.10.20 613所 姬强 CODEV公差分析
东南大学 2016.12.15 东南大学显示中心 汤勇明 投显系统客观性能测量表征研究
613所 2015.11.12 613所 刘玉杰 基于SBG的全息波导显示技术研究
     
学术会议
会议名称时间地点本人报告本人报告题目
第七届国际先进光学制造与检测学术会议(AOMATT2014) 2014.4.27 哈尔滨 Test Diffraction Properties of Reflection Waveguide Holograms
中国航空兵器学会2017年学术年会 2017.11.16 西安 多层全息波导元件平行度对显示图像的影响
     
代表作
论文名称
Experimental method for testing diffraction properties of reflection waveguide holograms
Study on measuring refractive index modulation of volume phaseholographic gratings
Test Diffraction Properties of Reflection Waveguide Holograms
 
答辩委员会组成信息
姓名职称导师类别工作单位是否主席备注
赵建林 正高 教授 博导 西北工业大学 光学
张毅 正高 教授 博导 南京理工大学 光学工程
王鸣 正高 教授 博导 南京师范大学 光学
雷威 正高 教授 博导 东南大学 光学
李青 正高 教授 博导 东南大学 光学
赵振宇 正高 研究员 硕导 航空工业光电所 座舱显示与人机功效
康明武 正高 研究员 硕导 航空工业光电所 光学工程
      
答辩秘书信息
姓名职称工作单位备注
肖梅 副高 副教授 东南大学