Abstract: Radiance efficiency measurement. A non-transitory machine-readable storage medium includes executable instructions that, when executed, cause one or more processors to calculate, based on input radiation data, which is based on radiation from a radiation source, a difference of a radiance of the radiation source and a radiance of a background to the radiation source. The one or more processors are further caused to calculate, based on the difference, a transmissivity of the radiation source such that the calculated transmissivity of the radiation source is defined for flare combustion temperatures. The one or more processors are further caused to output the transmissivity of the radiation source.

Abstract: Corner cube retroreflector apparatus. At least one of the illustrative embodiments is an apparatus with three plates, each with a face, each adjoined substantially perpendicular and substantially normal to each other; an alignment device coupled to the first plate face with an adjustable plate substantially parallel to the first plate face and movably coupled to the first plate, and adjustable with respect to an angular relationship with the second and third plates; a second alignment device coupled to the second plate face with an adjustable plate substantially parallel to the second plate face and movably coupled to the second plate, and adjustable with respect to an angular relationship with the first and third plates; attachment appurtenances on both alignment devices which holds components of the retroreflective device onto the alignment devices during assembly; and apertures through which portions of the retroreflective device are accessible during assembly.

Abstract: Corner cube retroreflector apparatus. At least one of the illustrative embodiments is an apparatus with three plates, each with a face, each adjoined substantially perpendicular and substantially normal to each other; an alignment device coupled to the first plate face with an adjustable plate substantially parallel to the first plate face and movably coupled to the first plate, and adjustable with respect to an angular relationship with the second and third plates; a second alignment device coupled to the second plate face with an adjustable plate substantially parallel to the second plate face and movably coupled to the second plate, and adjustable with respect to an angular relationship with the first and third plates; attachment appurtenances on both alignment devices which holds components of the retroreflective device onto the alignment devices during assembly; and apertures through which portions of the retroreflective device are accessible during assembly.

Abstract: A method of assembling a retroreflective device comprising arranging a first, a second, and a third reflective surface normal to one another; observing an angular relationship between the reflective surfaces; adjusting the angular relationship between the reflective surfaces; and adjoining the reflective surfaces with supporting members and an adhesive, wherein the supporting members are of substantially the same material as the substrate of the reflective surfaces, have a cross-sectional shape that is complimentary to the edges of the reflective surfaces, and are arranged along the adjacent edges of the reflective surfaces.

Abstract: A method of assembling a retroreflective device comprising arranging a first, a second, and a third reflective surface normal to one another; observing an angular relationship between the reflective surfaces; adjusting the angular relationship between the reflective surfaces; and adjoining the reflective surfaces with supporting members and an adhesive, wherein the supporting members are of substantially the same material as the substrate of the reflective surfaces, have a cross-sectional shape that is complimentary to the edges of the reflective surfaces, and are arranged along the adjacent edges of the reflective surfaces.

Abstract: Radiance efficiency measurement. A non-transitory machine-readable storage medium includes executable instructions that, when executed, cause one or more processors to calculate, based on input radiation data, which is based on radiation from a radiation source, a difference of a radiance of the radiation source and a radiance of a background to the radiation source. The one or more processors are further caused to calculate, based on the difference, a transmissivity of the radiation source such that the calculated transmissivity of the radiation source is defined for flare combustion temperatures. The one or more processors are further caused to output the transmissivity of the radiation source.

Abstract: A resonant spectrophone system has a laser arranged to direct a laser beam into a chamber containing gas to be analyzed wherein absorption data relative to the gas constituents is obtained by detecting pressure variations within the chamber. The laser is operated such that the laser beam passing through the chamber generates a resonant wave therein. Pressure variations within the chamber are monitored at locations corresponding to nodal and/or peak points of the resonant wave. The nodal point signals represent background noise and are subtracted from the peak point signals to remove noise components from the peak point signals or out-of-phase nodal signals are subtracted to perform this function and thereby yield signals which more accurately represent the absorption data relative to the gas constituents.