High quality digital holographic reconstruction on analog film

B. Nelsen; P. Hartmann

doi:10.1117/12.2265887

15 May 2017 High quality digital holographic reconstruction on analog film

B. Nelsen, P. Hartmann

Proceedings Volume 10233, Holography: Advances and Modern Trends V; 1023319 (2017) https://doi.org/10.1117/12.2265887
Event: SPIE Optics + Optoelectronics, 2017, Prague, Czech Republic

Abstract

High quality real-time digital holographic reconstruction, i.e. at 30 Hz frame rates, has been at the forefront of research and has been hailed as the holy grail of display systems. While these efforts have produced a fascinating array of computer algorithms and technology, many applications of reconstructing high quality digital holograms do not require such high frame rates. In fact, applications such as 3D holographic lithography even require a stationary mask. Typical devices used for digital hologram reconstruction are based on spatial-light-modulator technology and this technology is great for reconstructing arbitrary holograms on the fly; however, it lacks the high spatial resolution achievable by its analog counterpart, holographic film. Analog holographic film is therefore the method of choice for reconstructing highquality static holograms. The challenge lies in taking a static, high-quality digitally calculated hologram and effectively writing it to holographic film. We have developed a theoretical system based on a tunable phase plate, an intensity adjustable high-coherence laser and a slip-stick based piezo rotation stage to effectively produce a digitally calculated hologram on analog film. The configuration reproduces the individual components, both the amplitude and phase, of the hologram in the Fourier domain. These Fourier components are then individually written on the holographic film after interfering with a reference beam. The system is analogous to writing angularly multiplexed plane waves with individual component phase control.

Citation Download Citation

B. Nelsen and P. Hartmann "High quality digital holographic reconstruction on analog film", Proc. SPIE 10233, Holography: Advances and Modern Trends V, 1023319 (15 May 2017); https://doi.org/10.1117/12.2265887

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KEYWORDS

Holograms

Digital holography

Holography

Lithography

Multiplexing

Reconstruction algorithms

Wave plates

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