Fully complex optical modulation with an analogue ferroelectric liquid crystal spatial light modulator

Birch, Philip; Young, Rupert; Chatwin, Chris; Farsari, Maria; Budgett, David; Richardson, J. D.

doi:10.1016/s0030-4018(00)00478-8

Cited by 42 publications

(21 citation statements)

References 7 publications

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“…The method is perfectly realisable optically. This could be accomplished by using two SLMs or encoding on a carrier wave hologram such as in [17]. The measurement of the phase of the peak could be achieved interferometrically by either placing a 4-f correlator within the arm of a Mach-Zhender interferometer or by passing the output into a point diffraction interferometer [18].…”

Section: Discussionmentioning

confidence: 99%

Intensity invariant complex encoded color correlation

Birch

2012

Appl. Opt.

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Section: Discussionmentioning

confidence: 99%

Intensity invariant complex encoded color correlation

Birch

2012

Appl. Opt.

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“…Unfortunately, current SLMs can modulate either phase or intensity of an incident light, but not both [11,12]. Some methods are proposed to alleviate the practical limitation in modulation [13][14][15][16][17][18][19][20][21]. But, in these methods, the holograms need to be recalculated to match the specific display systems.…”

Section: Introductionmentioning

confidence: 99%

Complex Fresnel hologram display using a single SLM

et al. 2011

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We propose a novel optical method to display a complex Fresnel hologram using a single spatial light modulator (SLM). The method consists of a standard coherent image processing system with a sinusoidal grating at the Fourier plane. Two or three position-shifted amplitude holograms displayed at the input plane of the processing system can be coupled via the grating and will be precisely overlapped at the system's output plane. As a result, we can synthesize a complex hologram that is free of the twin image and the zero-order light using a single SLM. Because the twin image is not removed via filtering, the full bandwidth of the SLM can be utilized for displaying on-axis holograms. In addition, the degree of freedom of the synthesized complex hologram display can be extended by involving more than three amplitude holograms.

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“…A first approach could be to use only one display where the complex information could be codified, using classical holographic methods 1 or new approaches. [2][3][4] These methods entail a loss of resolution when displaying the information on the devices. A second strategy is to couple two SLMs to obtain full complex modulation, taking into account the coupling optical setup and the modulation capabilities of each device.…”

Section: Introductionmentioning

confidence: 99%

Wavefront reconstruction by adding modulation capabilities of two liquid crystal devices

Tudela¹

2004

Opt. Eng

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Abstract. We analyze the behavior of complex information in the Fresnel domain, taking into account the limited capability to display complex values of liquid crystal devices when they are used as holographic displays. To do this analysis we study the reconstruction of Fresnel holograms at several distances using the different parts of the complex distribution. We also use the information adjusted with a method that combines two configurations of the devices in an adding architecture. The results of the error analysis show different behavior for the reconstructions when using the different methods. Simulated and experimental results are presented.

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Fully complex optical modulation with an analogue ferroelectric liquid crystal spatial light modulator

Cited by 42 publications

References 7 publications

Intensity invariant complex encoded color correlation

Intensity invariant complex encoded color correlation

Complex Fresnel hologram display using a single SLM

Wavefront reconstruction by adding modulation capabilities of two liquid crystal devices

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