| Presentation | 2005/2/17 Latent Image Forming by Liquid Crystal and Application to Optical Security Devices Rumiko YAMAGUCHI, Toru KAWAMURA, Susumu SATO, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Liquid crystal (LC) cells with latent images which are written by multi-alignment technique have been proposed for optical security devices. The glass plate coated with a photo-reactive polymer film is prepared as an alignment substrate of the LC cell. The polymer surface is rubbed and modified by exposing with a non-polarized UV light through the photo-mask. The LC cell using the patterned substrate surface is uniformly transparent under the normal condition (without polarizers). However, the image written with the mask pattern appears when the cell is set between two polarizers. The guest-host LC cell which has double-faced latent images is also demonstrated using another photo-reactive polymer. The latent image can individually be visible and selected by replacing the polarizer in front or behind the LC cell. Logical images for two latent images written on each substrate can be obtained when the LC cell is set between two polarizers. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Liquid Crystal / Alignment Film / Rubbing Treatment / Photo Modification / Latent Image / Guest-Host Effect / Optical Security |
| Paper # | EID2004-82 |
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| Conference Information | |
| Committee | EID |
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| Conference Date | 2005/2/17(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
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| Assistant | |
| Paper Information | |
| Registration To | Electronic Information Displays (EID) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Latent Image Forming by Liquid Crystal and Application to Optical Security Devices |
| Sub Title (in English) | |
| Keyword(1) | Liquid Crystal |
| Keyword(2) | Alignment Film |
| Keyword(3) | Rubbing Treatment |
| Keyword(4) | Photo Modification |
| Keyword(5) | Latent Image |
| Keyword(6) | Guest-Host Effect |
| Keyword(7) | Optical Security |
| 1st Author's Name | Rumiko YAMAGUCHI |
| 1st Author's Affiliation | Department of electrical and electronic engineering, Akita University() |
| 2nd Author's Name | Toru KAWAMURA |
| 2nd Author's Affiliation | Department of electrical and electronic engineering, Akita University |
| 3rd Author's Name | Susumu SATO |
| 3rd Author's Affiliation | Department of electrical and electronic engineering, Akita University |
| Date | 2005/2/17 |
| Paper # | EID2004-82 |
| Volume (vol) | vol.104 |
| Number (no) | 666 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |