One-piece polarizing interferometer for ultrafast spectroscopic polarimetry

Ultrafast gating using a nonlinear Sagnac interferometer

Ultrafast gating is a powerful technique for applications such as time resolved spectroscopy [ 1-3 ], imaging through scattering media [4-7 ], or nonlinear optics [ 8 ]. Several methods have been used, each of which has its own limitations. The Kerr shutter [ 3 ] is extremely fast (femtosecond) but requires high peak power lasers. It has a maximum transmission of approximately 10 percent, and i...

One-piece casting for fixed bridgework.

A laboratory technique suitable for one-piece casting of short or long span bridges and its application to a seven-unit one-piece cast bridge is described. (Received for puhlicution August, 1980. Revised October, 1981.)

Introduction to nonlinear optical spectroscopic techniques for investigating ultrafast processes

Imaging polarimetry of the circularly polarizing cuticle of scarab beetles (Coleoptera: Rutelidae, Cetoniidae)

The light reflected from the metallic-shiny regions of the cuticle of certain beetles belonging to the Scarabaeoidea is known since 1911 to be left-handed circularly polarized. Only photographs of a few selected species of scarabs, taken through left- and right-circular polarizers, have earlier been published. Through a right-circular polarizer these beetles appear more or less dark. This demon...

Torque Removal Evaluation of Screw in One-Piece and Two-Piece Abutments Tightened with a Handheld screwdriver

Introduction: Some clinicians use a handheld screw driver instead of a torque wrench to definitively tighten abutment screws. The aim of this study was to compare the removal torque of one-piece and two-piece abutments tightened with a handheld driver and a torque control ratchet. Methods: 40 ITI implants were placed in acrylic blocks and divided into 4 groups. In groups one and two, 10 ITI one...