增强现实 虚拟现实头盔显示

1、2015ICube26-02-2015Yang Jianming1Laboratoire ICubeUMR 7357300, boulevard Sbastien Brant67412 ILLKIRCHJol FONTAINE Philippe Gerard Patrice Twardowskijianming.yangunistra.frhttp:/icube.unistra.fr/ The subject of my work Resarch path for the future Yang Jianming - 26-2-20152Yang Jianming - 26-2-20153 B

2、orn in Gansu province (1989) Lanzhou university (Physics) (2007.9-2011.6) Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences (CIOMP) (2011.9-2014.9) (5 years PhD without master degree)Yang Jianming - 26-2-20154SubjectVirtual reality (VR)VR system block off the lig

3、ht form the real environment and generate a computer-simulated environment.PiSightYang Jianming - 26-2-20155SubjectAugmented reality (AR)AR is a system that can provide additional information to the real world Yang Jianming - 26-2-20156SubjectYang Jianming - 26-2-20157SubjectWhy we dont put a screen

4、 directly in front of our eye?The near point is the closest distance at which you can focus on an object.Normally, the distance is greater than 10 cm. Innovegacontact lensYang Jianming - 26-2-20158SubjectThe basic structure of Near-eye optic system Near-eye optic system is a kind of eyepiece The fun

5、ction is to generate a vitural image which is from a microdisplay within the visual range of human eyeMicrodisplayVirtual imageMagnifierYang Jianming - 26-2-20159SubjectWhere are the difficulties ? The LaGrange Invariant is a rough measure of the difficulty of the design task. The pupil size of a HM

6、D is normally 8-15mm and semi-FOV is under 60-deg. LI of a normal HMD is not high for optical design! The difficulties come from the weight and the dimention We must design a compact system that can be wearable for humen Many kind of top technologies are used(Freeform surface, holographic optical el

7、ement, waveguide)Yang Jianming - 26-2-201510Previous workHumans eyes have a very wide field of view about 200130(HV) with a 120 overlap In order to produce an immersive feeling, we must cover the most part of the area that human eyes can reach.Tiling is the basic way to achieving wide FOV.Advantages

8、:High angular resolution,Small distortion, easy to designFOVNARpixelDisadvantages: There are gaps between every unit. Its difficult to produce a continuous image.needing a powerful control system to control all the units (24 in PiSight)Yang Jianming - 26-2-201511Previous work With two coupled ellips

9、oids the distortion can be offsetted. The relay can reduce the section in the second ellipsoid, which can reduce the aberrations.Yang Jianming - 26-2-201512Previous workIt also has many difficulties: system alignment(4 parts in different axis) manufacture(many lens) angular resolution (limited by si

10、ngle OLED 1920*1080 ) 16pixel/degree Yang Jianming - 26-2-201513Previous work The fold mirror makes the system in two axises. This cause the difficulties in alignment By Hollowing out the aspheric mirror and reflecting by a spheric mirror, the system can be coaxialYang Jianming - 26-2-201514Previous work Achieving images of 100 inch with a distances of 104 mm. The length of the projector is 165 mm.Yang Jianming - 26-2-201515Differences between PhD and previous work Yang Jianming - 26-2-201516Resarch path for the future Ya