College - Author 1

College of Engineering

Department - Author 1

Electrical Engineering Department

Degree Name - Author 1

BS in Electrical Engineering



Primary Advisor

Xiaomin Jin, College of Engineering, Electrical Engineering Department


Photophoretic Optical Trapping (POT) is a relatively new concept in the field of optics which has potential application in 3D display. The POT is realized by confining a particle within a very small location of the optical system, mostly around the focus. The particle, if captured by the beam, has the potential to print visible 3D images in free space. Our POT system is encapsulated by an acrylic enclosure, which also incorporates a biconvex lens as well as an adjustable focus laser module. Particles are released around the top of the lens’ focal point until the captured particle can be seen. This system establishes that there exists a maximum trapping distance limitation and is the first time the effect of focal length is studied in a POT system. Increasing POT focal length is necessary for improving this technology as a 3D display. The 3D imaging technology is realized by dragging a microscopic (micrometer-scale) particles with a laser beam to trace an image. Current technology can display fully colored and high-resolution 3D images visible from almost any direction. Current 3D display is limited in size to about 1cm 3 , the goal of this paper is to further research how the maximum trapping distance limitation can be increased to improve such displays.