|
In this paper, an incoherent holographic 3D imaging and display system usinga modified triangular interferometer is implemented and demonstrated. The incoherent holographic system based-on this modified triangular interferometer employs the superposition of Fresnel zone patterns in which the positions and intensities of the object points are uniquely encoded and from this system the complex holograms without bias and conjugate image for 3D object can be obtained. That is, the light reflected from a 3D object is divided into two beams by a beam splitter and input to the modified triangular interferometer. All patterns of two optical wave that travel the modified triangular interferometer in the clockwise and counterclockwise directions is detected by the CCD camera. Here, four pairs of interference pattern are detected by controlling combination of the waveplates in the modified interferometer system then, a complex hologram pattern without bias and conjugated image can be obtained through the modification process of these four patterns. The Mach-Zehnder interferometer is also employed, in this paper, to reconstruct this complex hologram. The real and imaginary parts of the complex hologram are placed in the upper and the lower arms of the interferometer. The Mach Zehnder intrferometer is used to reconstruct the comeplx hologram. That is, the real and imaginayr parts of a complex hologram are placed in each arm of the interferometer, respectively. And illuminating them coherently and recombining the light passed throught eh transparenceis bytheuse of the beam splitter allows the complex addition to be performed. Then, the desired 3D image is reconstructed through Fresnel diffraction, in which the panel plays a role of a holographic optical element. From some experiments with 3D object of "dies", it is suggested that a practical incoherent holographic 3D imaging and display system using a modifeid triangular interferometer can be implemented, in which the bias and conjugate image problems are alleviated.
|
