Bibliographic Details
| Title: |
Electrically Controlled Liquid Crystal Twist-Planar Fresnel Lens. |
| Authors: |
Mel'nikova, E. A.1 (AUTHOR) melnikova@bsu.by, Panteleeva, E. P.1 (AUTHOR), Gorbach, D. V.1 (AUTHOR), Tolstik, A. L.1 (AUTHOR), Rushnova, I. I.1 (AUTHOR), Kabanova, O. S.1 (AUTHOR) |
| Source: |
Journal of Applied Spectroscopy. Nov2024, Vol. 91 Issue 5, p1072-1077. 6p. |
| Subjects: |
Nematic liquid crystals, Fresnel diffraction, Fresnel lenses, Liquid crystals, Laser beams |
| Abstract: |
Based on the method of photo-orientation of the azo-dye AtA-2, an electrically controlled Fresnel lens has been developed which is a microstructured liquid crystal element made up of alternating rings with twist- and planar orientations of the liquid crystal director. It is shown that the use of a control voltage makes it possible to control the efficiency of the focusing of laser radiation, as well as to turn off the lens. An optimum control voltage (~3 V) is determined at which a maximum focal efficiency and satisfactory quality of image construction over a wide spectral range from 530 nm to 1.1 μm are attained. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
