| 摘要 |
<p>A process for hardening gelatin holograms (12) after dehydration involving subjecting the hologram (12) to an atmosphere containing aldehyde vapor (12) and water vapor (20). The process provides hardening of the gelatin hologram (12) to increase resistance to moisture and heat without adversely affecting diffraction efficiency. Monitoring of the diffraction efficiency during the aldehyde-water vapor treatment allows fine tuning of the hologram efficiency and evenness.</p> |
