Abstract:
A method of fabricating a structure includes disposing a liquid photoreactive composition on a substrate, exposing a portion of the liquid photoreactive composition to laser light of sufficient intensity and wavelength to cause polymerization via two-photon excitation of the two-photon sensitizer and polymerization of a portion of the liquid photoreactive composition thereby providing an exposed composition; and developing the exposed composition to provide the structure. The liquid composition includes: at least one cationically polymerizable polyepoxide; at least one compound comprising free-radically polymerizable groups; an effective amount of a two-photon photoinitiator system, wherein the weight ratio of component (a) to component (b) is from 25:75 to 75:25, inclusive. The two-photon photoinitiator system includes a two-photon sensitizer and an aromatic onium salt. The liquid photoreactive composition may contain less than about one percent by weight of organic solvent.
Abstract:
A semi-submersible microscope objective includes a microscope objective having a protective barrel with an optical inlet and optical outlet, and a protective element affixed to the microscope objective, sealing the optical exit but not the optical inlet. A transparent portion of the protective element is aligned with the optical exit. The protective element is separable from the microscope objective without damaging the microscope objective. Use of the semi-submersible microscope objective in a multiphoton imaging method is also disclosed.
Abstract:
A semi-submersible microscope objective includes a microscope objective having a protective barrel with an optical inlet and optical outlet, and a protective element affixed to the microscope objective, sealing the optical exit but not the optical inlet. A transparent portion of the protective element is aligned with the optical exit. The protective element is separable from the microscope objective without damaging the microscope objective. Use of the semi-submersible microscope objective in a multiphoton imaging method is also disclosed.
Abstract:
A semi-submersible microscope objective (100) includes a microscope objective having a protective barrel (120) with an optical inlet (122) and optical outlet (124), and a protective element (130) affixed to the microscope objective, sealing the optical outlet (124) but not the optical inlet (122). A transparent portion (132) of the protective element is aligned with the optical exit (124). The protective element is separable from the microscope objective without damaging the microscope objective. Use of the semi-submersible microscope objective in a multiphoton imaging method is also disclosed.
Abstract:
A semi-submersible microscope objective (100) includes a microscope objective having a protective barrel (120) with an optical inlet (122) and optical outlet (124), and a protective element (130) affixed to the microscope objective, sealing the optical outlet (124) but not the optical inlet (122). A transparent portion (132) of the protective element is aligned with the optical exit (124). The protective element is separable from the microscope objective without damaging the microscope objective. Use of the semi-submersible microscope objective in a multiphoton imaging method is also disclosed.
Abstract:
Lightguides, devices incorporating lightguides, processes for making lightguides, and tools used to make lightguides are described. A lightguide includes light extractors arranged in a plurality of regions on a surface of the lightguide. The orientation of light extractors in each region is arranged to enhance uniformity and brightness across a surface of the lightguide and to provide enhanced defect hiding. The efficiency of the light extractors is controlled by the angle of a given light extractor face with respect to a light source illuminating the light guide.
Abstract:
The present disclosure relates to multiphoton absorption methods for curing a photocurable composition under conditions wherein negative contrast occurs. The photocurable composition includes a free-radically polymerizable compound. The method is applicable to fabrication of structures with micron-scale dimensions or less.
Abstract:
A method of fabricating a structure includes disposing a liquid photoreactive composition on a substrate, exposing a portion of the liquid photoreactive composition to laser light of sufficient intensity and wavelength to cause polymerization via two-photon excitation of the two-photon sensitizer and polymerization of a portion of the liquid photoreactive composition thereby providing an exposed composition; and developing the exposed composition to provide the structure. The liquid composition includes: at least one cationically polymerizable polyepoxide; at least one compound comprising free-radically polymerizable groups; an effective amount of a two-photon photoinitiator system, wherein the weight ratio of component (a) to component (b) is from 25:75 to 75:25, inclusive. The two-photon photoinitiator system includes a two-photon sensitizer and an aromatic onium salt. The liquid photoreactive composition may contain less than about one percent by weight of organic solvent.
Abstract:
Lightguides, devices incorporating lightguides, processes for making lightguides, and tools used to make lightguides are described. A lightguide includes light extractors arranged in a plurality of regions on a surface of the lightguide. The orientation of light extractors in each region is arranged to enhance uniformity and brightness across a surface of the lightguide and to provide enhanced defect hiding. The efficiency of the light extractors is controlled by the angle of a given light extractor face with respect to a light source illuminating the light guide.