Cationic two-photon induced polymerization with high dynamic range

High dynamic range cationic two-photon photopolymerization

Cationic-induced two-photon photopolymerization is demonstrated at 710 nm, using an isopropylthioxanthone / diarylidonium salt initiating system for the cationic polymerization of an epoxide. The polymerization threshold J2th is found to be approximately 1 GW/cm, with a dynamic range of > 100, i.e. the material can be fully polymerized at intensities > 100 times the threshold level without dama...

High Dynamic Range Image with Two Exposures

In related work, most algorithms generate high dynamic range image by fusing several differently exposed images. In this paper, we propose an image fusion pipeline that generates a high dynamic range image by fusing longand short-exposure raw images. Some algorithms generating high dynamic range image with two exposure images may incur artifacts. Our method uses the property of raw image to ove...

Ultrasensitive and high-dynamic-range two-photon absorption in a GaAs photomultiplier tube.

We demonstrate improved efficiency and dynamic range for two-photon absorption at 1.5 microm in a photoelectron-counting GaAs photomultiplier tube. cw laser measurements show pure two-photon absorption occurring in the device from average powers of 1.3 microW to nearly 1 mW. We use the detector to implement an autocorrelator with peak-power x average-power sensitivity of 1.7 x 10(-4) (mW)(2) an...

Two-photon polymerization microstructuring in regenerative medicine.

Two-photon polymerization has developed as a powerful tool for making micro- and nanoscale structures for regenerative medicine applications. This review discusses micro- and nanoscale aspects of tissue engineering, which are followed by a brief description of the two-photon polymerization process and how it has been used thus far in tissue engineering and other regenerative medicine applicatio...

Three-Dimensional Microfabrication by Two-Photon Polymerization