Abstract: The present invention generally relates to protective headgear worn by a user to protect his eyes, head, and face. More particularly, the present invention is directed to a protective headgear assembly used by welders and the like wherein a headgear strap can be tightened or loosened upon the ratcheting of a knob connected to the headgear strap. The headgear strap can also be automatically disengaged for removal of the headgear by pulling the knob away from the user's head.

Abstract: The present invention generally relates to protective headgear worn by a user to protect his eyes, head, and face. More particularly, the present invention is directed to a protective headgear assembly used by welders and the like wherein a headgear strap can be tightened or loosened upon the ratcheting of a knob connected to the headgear strap. The headgear strap can also be automatically disengaged for removal of the headgear by pulling the knob away from the user's head.

Abstract: An eyewash system configured to dispense an eyewash fluid is disclosed. The eyewash system comprises a container configured to contain the eyewash fluid; a cover removably coupled to the container; and one or more projections located at least partially between the container and the cover in a stowed position when the cover is coupled to the container. The one or more projections move to a deployed position when the cover is removed from the container.

Abstract: The present invention generally relates to protective headgear worn by a user to protect his eyes, head, and face. More particularly, the present invention is directed to a protective headgear assembly used by welders and the like wherein a headgear strap can be tightened or loosened upon the ratcheting of a knob connected to the headgear strap. The headgear strap can also be automatically disengaged for removal of the headgear by pulling the knob away from the user's head.

Abstract: A substantially solid biomolecular solder for joining tissue comprising a partially denatured biomolecule. The solder can be formed into shapes to suit the needs of a user. The invention also relates to methods for joining tissue and methods for preparing the solder.

Abstract: The present invention relates to a stable solid-state Raman laser, the solid-state Raman laser including a resonator cavity defined by at least two reflectors, a laser material located in the resonator cavity and capable of generating a cavity laser beam which propagates within the resonator cavity, a solid Raman medium located in the resonator cavity for shifting the frequency of the cavity laser beam to produce a Raman laser beam which propagates within the resonator cavity; and an output coupler for coupling and outputting the Raman laser beam from the resonator cavity, wherein at least one parameter selected from the group consisting of the position of the laser material relative to the position of the Raman medium in the cavity, the length of the cavity and the curvature of at least one of the reflectors, is selected such that changes in the focal lengths of both the laser material and the Raman medium as a result of thermal effects in the laser material and the Raman medium during operation of the laser

Abstract: The present invention relates to a stable solid-state Raman laser (1), the solid-state Raman laser including: (a) a resonator cavity defined by at least two reflectors (M1 and M2), (b) a laser material (2A) located in the resonator cavity and capable of generating a cavity laser beam which propagates within the resonator cavity, (c) a solid Raman medium (7) located in the resonator cavity for shifting the frequency of the cavity laser beam to produce a Raman laser beam which propagates within the resonator cavity; and (d) an output coupler (M2) for coupling and outputting the Raman laser beam from the resonator cavity, wherein at least one parameter selected from the group consisting of (i) the position of the laser material (2A) relative to the position of the Raman medium (7) in the cavity, (ii) the length of the cavity and (iii) the curvature of at least one of the reflectors (M1 or M2), is selected such that changes in the focal lengths of both the laser material (2A) and the Raman medium (7) as a result

Abstract: A nonlinear Yb:YAB laser material is disclosed. The material is capable of generating fundamental o-polarized first wavelength laser light and frequency doubled e-polarized second wavelength laser light, the material being oriented for type 1 phase matching of the first wavelength laser light. Also disclosed is a laser system. The system comprises a pumping light source emitting a pumping beam of light, a laser cavity having an input coupler operatively disposed with respect to the light source so as to couple the pumping beam of light into the cavity, and a nonlinear Yb:YAB laser material capable of lasing in response to a pumping beam of light thereby generating fundamental o-polarized first wavelength laser light and frequency doubled e-polarized second wavelength laser light, the material being oriented for type 1 phase matching of the first wavelength laser light, the first wavelength laser light being in the range of 1020-1100 nm and the second wavelength laser light being in the range of 510-550 nm.

Abstract: A low-power, continuous wave laser beam is injected into the optical cavity of a high gain, high power, short pulsed laser. The output beam features excellent power and wavelength stability.

Abstract: A metal vapor laser intended to be excited by an electrical discharge pulsed through a metal vapor, consisting of a tubular chamber terminated at each end by a terminating flange, the terminating flange (1) having formed integrally with it a cold cathode structure having associated with it a multiplicity of electron generating devices (10, 11, 12) for non-thermionic generation of electrons. The electron generating devices (10, 11, 12) consist preferably of a series of annular grooves (10) formed in the surface of a bore of the terminating flange (1) and a circular groove or grooves (11) coaxial with the axis of the laser and cut in to a face of the terminating flange (1) facing directly into the discharge volume (8). Additionally, to increase carrying capability and facility for easily striking the discharge there is provide a ring of refractory metal pins (12) fixed into that surface of the terminating flange (1).

Abstract: A method and arrangement for activating a photoirradiable chemical such as hematoporphyrin derivative (HPD) particularly in vivo by use of pulsed radiation of the required frequency higher energy input with less damage surrounding tissue can be achieved.