发明名称 Multifocal optical device with spurious order suppression and method for manufacture of same
摘要 A multifocal optical device is provided for focusing light traveling parallel to an optical axis of the device. The multifocal optical device comprises a multifocal phase zone plate including at least two annular zones disposed substantially concentrically about the optical axis and spaced in a radial dimension from the optical axis in proportion to the square root of q, where q is an integer zone number; and an absorbing material disposed on a portion of ones of the annular zones for absorbing a portion of the light.
申请公布号 US5120120(A) 申请公布日期 1992.06.09
申请号 US19900558442 申请日期 1990.07.27
申请人 COHEN, ALLEN L. 发明人 COHEN, ALLEN L.
分类号 G02B5/18 主分类号 G02B5/18
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