enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Photoalignment - Wikipedia

   en.wikipedia.org/wiki/Photoalignment

   Photoalignment is a technique for orienting liquid crystals to desired alignment by exposure to polarized light and a photo reactive alignment chemical. [1] It is usually performed by exposing the alignment chemical ('command surface') to polarized light with desired orientation which then aligns the liquid crystal cells or domains to the exposed orientation.

3. Liquid crystal - Wikipedia

   en.wikipedia.org/wiki/Liquid_crystal

   Liquid crystal lenses are a kind of adaptive optics. Imaging systems can benefit from focusing correction, image plane adjustment, or changing the range of depth-of-field or depth of focus. The liquid crystal lense is one of the candidates to develop vision correction devices for myopia and presbyopia (e.g., tunable eyeglass and smart contact ...

4. Homeotropic alignment - Wikipedia

   en.wikipedia.org/wiki/Homeotropic_alignment

   Homeotropic alignment often appears in the smectic A phase (S A). In discotic liquid crystals homeotropic alignment is defined as the state in which an axis of the column structure, which is formed by disc-like liquid crystalline molecules, aligns perpendicularly to a substance. In other words, this alignment looks like a state in which columns ...

5. Homogeneous alignment - Wikipedia

   en.wikipedia.org/wiki/Homogeneous_alignment

   In liquid crystals homogeneous alignment, sometimes called planar alignment, is the state of alignment where molecules align in parallel to a substrate. The opposite method is homeotropic alignment. [1] For planar alignment - polyimides can be used. One of the popular ones is PI-2555.

6. Cholesteric liquid crystal - Wikipedia

   en.wikipedia.org/wiki/Cholesteric_liquid_crystal

   [1] [7] Lehmann was the first to coin the term liquid crystal. [8] Studies in liquid crystals soon blossomed, and in 1922 Georges Friedel created the classification system of liquid crystals still used today. In this system, he named the chiral variety of liquid crystals cholesteric, as they were discovered from a cholesterol derivative. [5] [9]

7. Category:Liquid crystals - Wikipedia

   en.wikipedia.org/wiki/Category:Liquid_crystals

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

8. Birefringence - Wikipedia

   en.wikipedia.org/wiki/Birefringence

   Depending on the symmetry of a crystal structure (as determined by one of the 32 possible crystallographic point groups), crystals in that group may be forced to be isotropic (not birefringent), to have uniaxial symmetry, or neither in which case it is a biaxial crystal. The crystal structures permitting uniaxial and biaxial birefringence are ...

9. Twisted nematic field effect - Wikipedia

   en.wikipedia.org/wiki/Twisted_nematic_field_effect

   OFF state. In the OFF state, i.e., when no electrical field is applied, the nematic liquid crystal molecules form a twisted configuration (aka helical structure or helix) between the two glass plates, G in the figure, which are separated by several spacers and coated with transparent electrodes, E 1 and E 2.