摘要:
Photopolymerizable compositions which comprise a borate anion, a squarylium sensitizer, and, in the preferred case, a halomethyl triazine are disclosed.
摘要:
Holographic notch filters are provided that comprise photopolymer films, having an optical density of at least 2, mounted on a transparent substrate.
摘要:
This invention relates to photopolymerizable compositions containing initiator systems that absorb in the longer wavelength region of the visible spectrum. Photopolymerizable compositions containing selected photodissociable initiators in combination with photobleachable sensitizers are disclosed.
摘要:
Solid photopolymerizable compositions and photosensitive elements are provided that are useful in preparing optical elements, and especially holograms. The composition contains a polymeric binder, a liquid ethylenically unsaturated monomer, and a photoinitiator system. Typical compositions have a refractive index modulation of at least 0.005 when measured per the specified test.
摘要:
Photopolymerizable compositions containing photoinitiator systems that absorb in the visible are disclosed. The photoinitiator system comprises a sensitizer which is a compound of the structure I: ##STR1## wherein R.sub.2 and R.sub.3 are alike or different and are selected from the group consisting of II and III: ##STR2##