In a traditional Fourier holographic projection, a clear reconstructed image is formed only in the focal plane of the Fourier lens. In this paper, we propose a novel method to form simultaneously holographic reconstructed images in good focus located at different continuous planes. The phase profile of the hologram is superimposed with the phase of diffractive axilens to obtain a new diffractive phase element (DPE). We use laser direct write lithography system to fabricate the desired DPE with smaller feature sizes of pixels. A comparative experiment is carried out to observe reconstructed images of superposition of the axilens phase and Fresnel lens phase on the phase hologram, respectively. Finally, the DPEs are drawn in a photoresist of glass substrate by laser direct write lithography technology, in which only a limited number of quantized phase levels m are achieved (e.g., m=2 , m=4 ). Our experiment results revealed that the approximate clear holographic images can be observed simultaneously on multiple planes by using the DPE, which is in good agreement with the simulations.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.