Light shutters

Figure 1. Schematic representation of operation of heterogeneous liquid crystal light shutters A) glass beads in a liquid crystal film, B) liquid crystal imbibed in a microporous film, C) encapsulated liquid crystal, D) polymer dispersed liquid crystals.

Light shutter AMR, GMR Variable inductance Contact - less... 

Fig. 7.11.5 Optical barrier using the light shutter technique (source Valeo)... 

The background counts with the light shutter closed can also be recorded and subtracted post hoc if the luminometer hard-ware/software makes this necessary. The lysis buffer contains excess Ca so that all active aequorin released from lysed cells will be discharged and emit light. The total light emission from this aliquot thus provides a measure of the total active aequorin in the cells being used in the assay. The custom sofiware we wrote uses this information to calculate in real time the... 

Figure 11.2 (a) Photo of the light shutter from polymer stabilized cholesteric texture (PSCT) normal... 

Figure 11.28 Schematic diagram showing how the polymer-stabilized homogeneously nematic liquid crystal light shutter works.

PSCT reverse-mode light shutter - This is also made from a mixtore of cholesteric liquid crystal (Ae > 0) and a small amount of monomer. The pitch of the liquid crystal is a few microns (-3-15 pm). The mixture is placed into a cell with homogeneous alignment layers. The mixture is in the planar texture at zero field because of the alignment layers. The monomers are polymerized in the planar textore. The polymer network formed is parallel to the cell surface [43,53,54]. 

Figure 11.31 Schematic diagram showing how the pol3mier-stabilized cholesteric texture reverse-mode light shutter works.

D.-K. Yang, L.C. Chien, and J.W. Doane, Cholesteric liquid crystal/polymer gel dispersion forhaze-liee light shutter, Appl. Phys. Lett., 60, 3102 (1992). 

The introduction of dispersions of liquid cryst s and polymers has grown into a broad class of materials important in electrically controll, scattering-based light shutters and bistable reflective displays. In liquid crystal and polymer dispersions the weight of polymers used can be varied from 80% to as low as 0.5%, depending on the application and type of polymer used. The systems containing a polymer of 20% or higher has been extensively studied are referred to as polymer dispersed liquid crystds (PDLC). (i) Currently, the systems of most interest are those with polymer concentrations less than 10%. 

Light memory element, video display and storage system, light modulation element, light shutter, light valve... 

Arakawa on-hne apparatus operates by directly irradiating a sample solution passing through a quartz photolysis cell located in the middle of the ESI spray tip to detect intermediates with lifetimes of more than few minutes (Figure 5.3). A light shutter equipped with a UV cutoff filter is mounted at the exit of the lamp to control photoirradiation. This set allows two different modes of irradiation. The first one, defined as cell mode irradiation, consists of the direct irradiation of the sample... 

Large Area Glass Light Shutters on Polymer Dispersed Liquid Crystal Films... 

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