Liquid Crystal Tunable Filter
Liquid Crystal Tunable Filter - Related Videos
13:38
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Cited by 9 •
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This study presents a methodology to prepare 3D, biodegradable, foam-like cell scaffolds based on biocompatible side-chain liquid crystal elastomers (LCEs). Confocal microscopy experiments show that foam-like LCEs allow for cell attachment, proliferation, and the spontaneous alignment of C2C12s myoblasts.
12:21
Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
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Cited by 7 •
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08:54
Synthesis and Exfoliation of Discotic Zirconium Phosphates to Obtain Colloidal Liquid Crystals
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Cited by 3 •
2016
A two dimensional model material of discotic zirconium phosphate was developed. The inorganic crystal with lamellar structure was synthesized by hydrothermal, reflux, and microwave-assisted methods. On exfoliation with organic molecules, layered crystals can be converted to monolayers, and nematic liquid crystal phase was formed at sufficient concentration of monolayers.
06:24
High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
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Cited by 3 •
2019
This protocol demonstrates the preparation of a photorheological material that exhibits a solid phase, various liquid crystalline phases, and an isotropic liquid phase by increasing temperature. Presented here are methods for measuring the structure-viscoelasticity relationship of the material.
06:44
From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
0 Views •
Cited by 2 •
2018
A protocol for the synthesis of a new type of mesogens, based on the halogen-bonded supramolecular anion [CnF2n+1-I···I···I-CnF2n+1]−, is reported.
FAQs
Applied voltage changes the birefringence of the liquid crystal, meaning it alters how the material affects different polarization components of light. When combined with polarizers and optical retarders, this voltage-dependent optical change modifies the transmission condition. Adjusting the voltage therefore selects a different wavelength without mechanically moving or replacing a filter.
Polarizers and optical retarders convert changes in liquid crystal birefringence into wavelength-dependent transmission differences. The liquid crystal changes the phase relationship between polarized light components, while the surrounding optical elements determine how that phase change affects the light reaching the detector. Together, these components enable selective spectral isolation rather than simple broadband transmission.
Electronic wavelength selection avoids the need to exchange physical filters as the desired spectral band changes. This supports rapid acquisition across multiple wavelengths using the same optical path and camera system. For biomedical imaging, the approach can simplify collection of spectral information and help capture changing optical signals without relying on mechanically repositioned components.
The selected band depends on the voltage applied to the liquid crystal and on the optical transmission condition established by the liquid crystal, polarizers, and retarders. Because voltage changes birefringence, different electrical settings produce different wavelength responses. The resulting setting determines which portion of the incoming spectrum reaches the imaging detector.
An imaging system sets the filter to successive transmission conditions while the camera records the corresponding image at each selected spectral band. Combining these images produces measurements across multiple bands rather than a single conventional color image. Multispectral and hyperspectral acquisition can then reveal wavelength-dependent tissue or signal differences for further biomedical analysis.
In medical imaging, spectral acquisition can support visualization of tissue structure, blood oxygenation, fluorescence signals, and other optical biomarkers. The filter provides access to multiple wavelength bands, allowing image data to capture differences that may not be apparent in a single-band view. These measurements can contribute to biomedical research and diagnostic imaging.
Researchers may use the technology when an experiment or imaging workflow needs spectral information without changing physical filters. Supported applications include biomedical research, diagnostic imaging, and image-guided procedures. In these settings, electronically selected bands can help investigate tissue characteristics, oxygenation-related signals, fluorescence, or other optical biomarkers captured by a camera.