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Magnified holographic projection based on spatial light modulators

Su Y., Cai Z., Shi L., Zhou F., Chen H., Wu J.

Optica Applicata

2018

Vol. 48, nr 4

589--600

In this paper, a magnified holographic projection based on spatial light modulators is proposed and implemented by combining four magnification methods, including similarity principle of Fourier transform, spatial division, digital lens, and image splicing methods. The Fourier holographic display system is constructed for the experimental verification of the proposed methods. With such four methods of holographic magnification, the reconstruction image can be magnified to 10 × 5 times in two-dimensional directions, which is verified by the experiments. Furthermore, the undesirable light of holographic projection is eliminated by encoding the linear phase onto the computer-generated holograms. The experimental results prove that the proposed system can realize magnified holographic projection with good reconstructed quality, which provides a promising potential for the dynamic holographic projector.

Spatiotemporal multiplexing method for visual field of view extension in holographic displays with naked eye observation

Finke G., Kujawińska M., Kozacki T., Zaperty W.

Opto-Electronics Review

2016

Vol. 24, No. 3

117--125

In this paper we propose a method which allows to overcome the basic functional problems in holographic displays with naked eye observation caused by delivering too small images visible in narrow viewing angles. The solution is based on combining the spatiotemporal multiplexing method with a 4f optical system. It enables to increase an aperture of a holographic display and extend the angular visual field of view. The applicability of the modified display is evidenced by Wigner distribution analysis of holographic imaging with spatiotemporal multiplexing method and by the experiments performed at the display demonstrator.

Modern applications of high frequency acoustooptics

Petrov V.

Optica Applicata

2004

Vol. 34, nr 4

597-606

The milestone applications of high frequency acoustooptics are discussed. The acoustooptical (AO) components such as Bragg modulator (including standing and running wave modulators), deflectors, others on very high frequencies (up to 10 GHz) working in wide frequency range (up to 3 GHz) are considered. Some review of traditional and modern uses is given. The main principles and peculiarities of Bragg cells design are discussed. The results of experimental investigationappeart to correspond with theoretical predictions. The specific problems which are stipulated by a very high frequency range are considered. These are: great influence of sound attenuation; peculiarities of interaction geometry and light aperture formation; multilayer transducer features; electrical matching with electromagnetic power wave guide. The ways of optimizing the parameters of high frequency Bragg cells are discussed.