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    • 5. 发明授权
    • Radically symmetric hologram and method of fabricating the same
    • 全自由对称全息图及其制造方法
    • US5202775A
    • 1993-04-13
    • US787075
    • 1991-11-04
    • Michael R. FeldmanW. Hudson WelchJames E. Morris
    • Michael R. FeldmanW. Hudson WelchJames E. Morris
    • G02B5/32G03H1/08
    • G02B5/32G03H1/08
    • A radially symmetric iterative discrete on-axis hologram has a high diffraction efficiency for a correspondingly small f-number. The radially symmetric hologram has a plurality of concentric constant radial phase fringes. Each fringe has a predetermined plurality of radial phase rings and each fringe corresponds to a predetermined plurality of radial phase transition points and a radial phase value between the radial phase transition points. The radially symmetric iterative discrete on-axis hologram also has radial phase fringes with a predetermined number of phase levels, at least two adjacent fringes have a phase level difference which is greater than one and less than the predetermined number minus one. The radially symmetric iterative discrete on-axis hologram is fabricated by determining a plurality of concentric fringes of constant phase with a plurality of radial phase transition points and radial phase values between the radial phase transition points for each concentric fringe. The plurality of radial phase transition points and radial phase values are repeatedly optimized to obtain optimized radial phase transition points and optimized radial phase values which maximize the diffraction efficiency. A radially symmetric hologram with concentric fringes of constant radial phase corresponding to the optimized radial phase transition points and the optimized radial phase values is then fabricated using known fabrication techniques.
    • 径向对称迭代离散的轴上全息图对于相应小的f数具有高的衍射效率。 径向对称全息图具有多个同心恒定的径向相位条纹。 每个条纹具有预定的多个径向相位环,并且每个条纹对应于预定的多个径向相变点和径向相变点之间的径向相位值。 径向对称的迭代离散轴上全息图还具有预定数量的相位电平的径向相位条纹,至少两个相邻边缘具有大于1且小于预定数量减去1的相位电平差。 径向对称的迭代离散的全轴全息图是通过确定多个恒定相位的同心条纹与多个径向相变点和每个同心条纹的径向相变点之间的径向相位值来制造的。 多个径向相变点和径向相位值被重复优化以获得最大化的衍射效率的优化的径向相变点和优化的径向相位值。 然后使用已知的制造技术制造具有对应于优化的径向相变点和优化的径向相位值的恒定径向相位的同心条纹的径向对称全息图。