Method for reducing short time-scale reciprocity failure effects of a microencapsulated acrylate system
US4804611A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1987 |
| Grant date | Feb 14, 1989 |
| Priority date | — |
| Expiry date | Jun 24, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/002
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a method for reducing short time-scale reciprocity failure effects of a photosensitive imaging sheet. The photosensitive imaging sheet comprises a substrate having a layer of microcapsules on one surface thereof. The microcapsules contain an internal phase of an acrylate monomer, photoinitiator, and color former. A portion of the microcapsules of the imaging sheet is image-wise exposed to high intensity light and then allowed to recover from the exposure. The exposure and recovery steps are repeated to form a latent image. By pulsing the light onto the photosensitive imaging sheet, the total exposure energy required per unit area is significantly reduced compared to the known short time-scale exposure method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.