Abstract: A radiant energy redirecting system, comprising at least two light-emitting sources, each emitting different frequency light; an optical cavity receiving light output from the sources, to mix therein, and act as a secondary emitter; a light receiver positioned to be illuminated by light from the secondary emitter.

Abstract: Lens apparatus includes a TIR lens having multiple facets, the lens having a central axis about which the facets extend in non-circular relation. The lens may have a non-circular perimeter about that axis, and that perimeter may be rectangular or square.

Abstract: A TIR lens having a central axis, and toward which light from a light source is to be directed, and a light ray deviator positioned along the path of light travel between the source and the TIR lens, for deviating light rays toward portions of the lens spaced from the axis, thereby to more evenly distribute light flux at the output of the TIR lens.

Abstract: A radiant energy redirecting system comprising a radiant energy transmitting body structure; the structure comprising multiple elements, each of which acts as a radiant energy redirecting module, having on its cross-sectional perimeter an entry face to receive incidence of the energy into the interior of the perimeter, an exit face to pass the energy to the exterior of the perimeter in a direction towards the reverse side of the body from the side of the incidence, and a Totally Internally Reflecting face angled relative to the entry and exit faces to redirect towards the exit face the radiant energy incident from the entry face; the body structure generally redirecting incident radiant energy towards a predetermined target zone situated apart from and on the reverse side of the body relative to the side of the incidence; and lens structure associated with at least one of the faces for redirecting radiant energy passing between the entry and exit faces via the Totally Internally Reflecting face.

Abstract: A radiant energy redirecting system comprising a radiant energy transmitting body structure; the structure comprising multiple elements, each of which acts as a radiant energy redirecting module, having on its cross-sectional perimeter an entry face to receive incidence of the energy into the interior of the perimeter, an exit face to pass the energy to the exterior of the perimeter in a direction towards the reverse side of the body from the side of the incidence, and a Totally Internally Reflecting face angled relative to the entry and exit faces to redirect towards the exit face the radiant energy incident from the entry face; the body structure generally redirecting incident radiant energy towards a predetermined target zone situated apart from and on the reverse side of the body relative to the side of the incidence; and lens structure associated with at least one of the faces for redirecting radiant energy passing between the entry and exit faces via the Totally Internally Reflecting face.

Abstract: The repair of a sewer line having a fracture, and employing a liner sleeve and an elastomer sleeve extending about the line sleeve, and a filler slurry, includes:(a) installing the liner sleeve and the elastomer sleeve endwise in the sewer line to locate the two sleeves in bridging relation with the fracture, and(b) displacing slurry into a space formed between the two sleeves to cause the elastomeric sleeve to expand and seal against the sewer line in bridging relation with the fracture.

Abstract: The repair of a sewer line having a fracture, and employing a liner sleeve and an elastomer sleeve extending about the line sleeve, and a filler slurry, includes:(a) installing the liner sleeve and the elastomer sleeve endwise in the sewer line to locate the two sleeves in bridging relation with the fracture, and(b) displacing slurry into a space formed between the two sleeves to cause the elastomeric sleeve to expand and seal against the sewer line in bridging relation with the fracture.

Abstract: Apparatus for integral collection and storage of solar thermal energy, comprises(a) a relatively large storage vessel having side and end walls that absorb solar energy in order to heat its contents;(b) a translucent enclosure surrounding the large storage vessel, for suppression of convective heat losses;(c) structure on the vessel for the suppression of thermal radiation heat losses from said large storage vessel;the apparatus providing a ratio of thermal mass, as measured in BTU per degree Fahrenheit, to heat-loss coefficient, as measured in BTU per degree Fahrenheit per hour, exceeding 36 hours.

Abstract: A radiant energy redirecting system comprises:(a) a radiant energy transmitting body means,(b) said means comprising multiple elements, each of which acts as a radiant energy redirecting module, having on its cross-sectional perimeter an entry face to receive incidence of said energy into the interior of said perimeter, an exit face to pass said energy to the exterior of said perimeter in a direction towards the reverse side of the body from the side of said incidence, and a Totally Internally Reflecting face angled relative to said entry and exit faces to redirect towards said exit face the radiant energy incident from said entry face,(c) said body means generally redirecting incident radiant energy towards a predetermined target zone situated apart from and on the reverse side of said body relative to the side of said incidence.