Abstract: A radiation source apparatus includes a vessel, a laser source, a collector, a horizontal obscuration bar, and a reflective mirror. The vessel has an exit aperture. The laser source is configured to emit a laser beam to excite a target material to form a plasma. The collector is disposed in the vessel and configured to collect a radiation emitted by the plasma and to reflect the collected radiation to the exit aperture of the vessel. The horizontal obscuration bar extends from a sidewall of the vessel at least to a position between the laser source and the exit aperture of the vessel. The reflective mirror is in the vessel and connected to the horizontal obscuration bar.

Abstract: A swim fin includes a foot pocket with a front and rear sections and an upper portion. The upper portion has a dorsal region, and first and second debossed regions with the dorsal region disposed between the debossed regions. The first and second debossed regions are laterally positionable adjacent the metatarsophalangeal joints of the foot of the user. The debossed region includes grooves formed therein. The foot pocket includes a foot pocket cavity. The swim fin further includes a fin blade extending from the front section of the foot pocket. The fin blade has a distal edge, a blade body disposed between the distal edge and the front section, and first and second triple-bladed rails. The triple-bladed rails are disposed longitudinally along the foot pocket and the blade body with the foot pocket and the blade body disposed between the first and second triple-bladed rails.

Abstract: A hollowing apparatus for preparation of meat patties for cooking includes a mold assembly and a press assembly. The mold assembly has at least one wall, an open top, and a closed bottom. The press assembly is shaped to correspond matingly with the mold assembly such that the press assembly is configured to be at least partially placed within the mold assembly. The press assembly is pressable against a quantity of meat within the mold assembly so as to shape the quantity of meat into a meat patty.