Abstract: An ordinary golf ball is cleaned and then treated with an emulsion depositing in the dimples a hologram having the capacity to reflect a pre-selected wavelength of laser-beam. If a player temporarily looses such ball, a hand-held unit directs an infra-red laser beam of said pre-selected wavelength, desirably one not absorbed by atmospheric moisture, such as 1310 nm. Said hand-held unit contains an analyzer evaluating the light reflected back to such analyzer and attributable to such laser beam of said pre-selected wave-length. By evaluating the intensity of such reflected light, the golfer can target the location of the temporarily lost ball. Upon approaching the lost ball the angle at which the unit would be held would be modified for focusing on the ball. Earphones, meters, or other diagnostic equipment can monitor the intensity of the light reflected back from such laser beam.

Abstract: A radiation dosimeter includes an optical waveguide enclosing a radiation-sensitive material that changes color or color intensity with increasing amounts of exposure to high energy ionizing radiation. A light-transparent radiation-transparent light-transmitting member extends along the length of the optical waveguide, and is separated from the radiation-sensitive material by a light-opaque sidewall. Outside the light-transmitting member is a light-opaque shield that permits light to enter distal ends of the waveguide and the light-transmitting member, while permitting light to exit the proximal ends thereof, the light-opaque shield being transparent to high energy ionizing radiation.

Abstract: A radiological measuring instrument including an angularly variable radiation sensitive structure comprised of two blocks of material having a different index of refraction with one of the materials comprising a radiochromic substance whose refractive index changes through anomolous dispersion as a result of being exposed to radiation. The ratio of the two indices of refraction is selected to be close to unity, with the radiation sensitive structure being pivotally adjusted so that light is directed into one end of the block comprising a material having the greater index of refraction. This element, moreover, is selected to be clear and transparent with the incident angle being close to the critical angle where total reflection of all incident light occurs. A portion of the incident light is furthermore projected through the clear transparent block without reflection, with the two beams emerging from the other end of the block, where they are detected.

Abstract: A radiochromic leuko dye dosimeter includes a plastic tube containing a solution of a radiochromic dye which is sensitive to ionizing radiation, one end of the tube being closed by a reflective surface, the opposite end of the tube being closed by a transparent plug to form a one-way optical waveguide. Light enters the tube through the transparent end thereof and is reflected back and exits through the transparent end. The intensity of the exiting light is measured to determine radiation induced absorption of the leuko dye.

Abstract: An optical waveguide dosimeter for personnel dosimetry is provided including a liquid solution of leuko dye hermetically sealed in plastic tubing. Optical transport is improved by dipping the ends of the plastic tubing into clear epoxy, thus forming beads that serve as optical lenses. A layer of clear ultraviolet absorbing varnish coated on these beads and an opaque outer layer over the plastic tubing provides protection against ambient UV.

Abstract: Cross welds in metal tube moving continuously along a path are removed by means of a method which includes the sequential steps of generating signals representative of predetermined linear movements of the tube, detecting the presence of cross welds in the tube and, on detecting the presence of such cross welds, passing signals to a counter device which is operable after receiving a predetermined number of these signals to actuate a cutting device which removes the cross weld from the tube.

Abstract: A hard, clear, glassy, smooth polymer with a dry surface having a dye precursor therein which forms a permanent color at those areas of the solid polymer that have been irradiated with ultra-violet or ionizing radiation is formed by combining vinyl and/or acrylic monomers, a triphenylmethane cyanide dye precursor and a chemical initiator that is compatible with the dye cyanide and polymerizing in the presence of a slight excess of hydrogen ions in an inert atmosphere.

Abstract: A construction machine composed of a backhoe on a tractor vehicle equipped with a high strength cab, the machine further including a boom assembly mounted atop the cab for pivotal movement about a vertical axis and a horizontal axis. The boom can be equipped with a suitable tool to cooperate with the backhoe. The boom preferably carries a pole claw and a cable equipped with a chain and hook for erecting a pole, while the backhoe can perform the attendant digging and refilling of the trench.