Fringe counter for interferometers Patent

Digital sensor for counting fringes produced by interferometers with improved sensitivity and one photomultiplier tube to eliminate alignment proble

Rapidly reconfigurable slow-light system based on off-resonant Raman absorption

We present a slow-light system based on dual Raman absorption resonances in warm rubidium vapor. Each Raman absorption resonance is produced by a control beam in an off-resonant Λ system. This system combines all optical control of the Raman absorption and the low-dispersion broadening properties of the double Lorentzian absorption slow light. The bandwidth, group delay, and central frequency of the slow-light system can all be tuned dynamically by changing the properties of the control beam. We demonstrate multiple pulse delays with low distortion and show that such a system has fast switching dynamics and thus fast reconfiguration rates

Enforcing a Wall of Separation Between Big Business and State: Protection from Monopolies in State Constitutions

The goal of this Note is not to convince the reader to care more about regulatory monopolies than private ones. In fact, it is not to talk about private antitrust law at all. Instead, the goal is to put today’s concern with monopolies in historical perspective. Part I traces the history of the antimonopoly spirit in the United States starting with the English tradition that was highly influential on the Founders. This Note then demonstrates that today’s concern with private monopolies comes from a shift that took place during the progressive era. In Part II, this Note highlights the role state constitutional claims can have in protecting rights, as explained by Justice William Brennan. Finally, in Part III, this Note provides a blueprint for how state antimonopoly provisions may be used to target state-created monopolies in practice and reclaim America’s Founding antimonopoly spirit

Wide-angle flat field telescope

Described is an unobscured three mirror wide angle telescopic imaging system comprised of an input baffle which provides a 20 deg (Y axis) x 30 deg (X axis) field of view, a primary mirror having a convex spherical surface, a secondary mirror having a concave ellipsoidal reflecting surface, a tertiary mirror having a concave spherical reflecting surface. The mirrors comprise mirror elements which are offset segments of parent mirrors whose axes and vertices commonly lie on the system's optical axis. An iris diaphragm forming an aperture stop is located between the secondary and tertiary mirror with its center also being coincident with the optical axis and being further located at the beam waist of input light beams reflected from the primary and secondary mirror surfaces. At the system focus following the tertiary mirror is located a flat detector which may be, for example, a TV imaging tube or a photographic film. When desirable, a spectral transmission filter is placed in front of the detector in close proximity thereto