Electro-optic polymer liquid crystal thin films for hyperspectral imaging

Schundler, Elizabeth

doi:10.1117/1.jrs.6.063549

Cited by 8 publications

(2 citation statements)

References 14 publications

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“…Such electro-optic HPDLCs consist of LCs incorporated into photopolymer followed by holographic polymerization that represents a fast and relatively simple way of fabricating multi-dimensional refractive index grating structures for electrically switchable and tunable photonic devices [7]. They have been used for wavelength filters, 3D displays, hyperspectral imaging, optical beam switching/control devices, sensors, lasers, optical memory and photonic crystals [8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24]. …”

Section: Introductionmentioning

confidence: 99%

Spatial Frequency Responses of Anisotropic Refractive Index Gratings Formed in Holographic Polymer Dispersed Liquid Crystals

Fukuda¹,

Tomita²

2016

Materials

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We report on an experimental investigation of spatial frequency responses of anisotropic transmission refractive index gratings formed in holographic polymer dispersed liquid crystals (HPDLCs). We studied two different types of HPDLC materials employing two different monomer systems: one with acrylate monomer capable of radical mediated chain-growth polymerizations and the other with thiol-ene monomer capable of step-growth polymerizations. It was found that the photopolymerization kinetics of the two HPDLC materials could be well explained by the autocatalytic model. We also measured grating-spacing dependences of anisotropic refractive index gratings at a recording wavelength of 532 nm. It was found that the HPDLC material with the thiol-ene monomer gave higher spatial frequency responses than that with the acrylate monomer. Statistical thermodynamic simulation suggested that such a spatial frequency dependence was attributed primarily to a difference in the size of formed liquid crystal droplets due to different photopolymerization mechanisms.

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Section: Introductionmentioning

confidence: 99%

Spatial Frequency Responses of Anisotropic Refractive Index Gratings Formed in Holographic Polymer Dispersed Liquid Crystals

Fukuda¹,

Tomita²

2016

Materials

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“…2 In order to study important transient scenes such as fast biochemical reactions and cellular dynamic events in a single piece of tissue, it is desirable to acquire multispectral images of biological tissues at high temporal resolution. 5 In addition, the sequential acquisition mode is the intrinsic barrier that cannot be easily overcome. However, these filters are polarization sensitive and suffer from poor light throughputs.…”

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confidence: 99%

In vivosimultaneous multispectral fluorescence imaging with spectral multiplexed volume holographic imaging system

Zhang

et al. 2016

J. Biomed. Opt

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A simultaneous multispectral fluorescence imaging system incorporating multiplexed volume holographic grating (VHG) is developed to acquire multispectral images of an object in one shot. With the multiplexed VHG, the imaging system can provide the distribution and spectral characteristics of multiple fluorophores in the scene. The implementation and performance of the simultaneous multispectral imaging system are presented. Further, the system’s capability in simultaneously obtaining multispectral fluorescence measurements is demonstrated with in vivo experiments on a mouse. The demonstrated imaging system has the potential to obtain multispectral images fluorescence simultaneously.

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