Improving the Angular Visibility of Photopolymer-Based Reflection Holograms for Sensing Applications.

ABSTRACT: Volume reflection hologram-based sensors are designed to visibly change colour in response to a target stressor or analyte. However, reflection holograms fabricated in thick photopolymer films are highly angularly selective, making these sensors challenging to view and interpret by non-experts. Here, the use of speckle holography to improve the visibility of reflection holograms is presented. A novel recording approach combining speckle recording techniques with Denisyuk reflection recording geometry is described. The recorded speckle reflection grating operates as a series of multiplexed reflection gratings with a range of spatial frequencies, capable of reflecting light at a wider range of angles. A comparative study of the angular and wavelength selectivity of speckle and standard refle

SUBMITTER: Mikulchyk T 

PROVIDER: S-EPMC10181154 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature