title: Volume-holographic filters for rotational sensing of three-dimensional objects.
abstract: A highly precise rotational filter based on a volume-holographic optical element is proposed and demonstrated. We present a clear theoretical calculation of the rotation sensitivity of the volume-holographic filter used to sense the rotation of a spherical ground glass object. By introducing the longitudinal displacement of the scattering point across the sphere, the sensitivity of the filter is greatly improved to 350 times that of a general case for a planar ground glass.
authors.affiliation: Department of Optics and Photonics, National Central University, Chung-Li 320, Taiwan.
authors.forename: Tun-Chien
authors.initials: TC
authors.lastname: Teng
authors.forename: Wen-Jay
authors.initials: WJ
authors.lastname: Zhong
authors.forename: Shi-Hsin
authors.initials: SH
authors.lastname: Ma
authors.forename: Ching-Cherng
authors.initials: CC
authors.lastname: Sun
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D005374:Filtration / Q000379:methods*; D006696:Holography / Q000379:methods*; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008962:Models, Theoretical; D012399:Rotation