Producing of conventional optical reflection hologram can be classified into one-step method and two-step method. In one-step method, only the diverging light of the object could be recorded, and the reconstructed scene is a virtual one behind the recording medium. In two-step method, the diverging light or the converging light could be recorded alternatively. However, the process is complicated considering double exposures. We propose a novel method of one-step reflection hologram. The object is first imaged by a 4f optical system, then the interference fringes are recorded by single exposure. The reconstructed image can be either a virtual image behind the recording medium, or a real image in front of the recording medium. The ideal imaging properties of 4f optical system have been demonstrated theoretically and the proposed method has been verified experimentally.
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