Abstract: A system. The system includes a first beam path configured to transmit a first light beam having a first optical wavelength and a second beam path configured to transmit a second light beam having a second optical wavelength distinct from the first optical wavelength. A first beam splitter disposed at an intersection of the first beam path and the second beam path. The first beam splitter is configured to superimpose the first and second light beams to form a third light beam, the third light beam impinging on a first window of a sample cell. The sample cell defines an interior volume and is configured to transfer the third light beam from the first window to a second window along a light path within the interior volume. The light path comprises a plurality of segments. The third light beam undergoes at least one reflection at an end of each segment, wherein the light path passes through a gas sample disposed within the interior volume.

Abstract: A system. The system includes a first beam path configured to transmit a first light beam having a first optical wavelength and a second beam path configured to transmit a second light beam having a second optical wavelength distinct from the first optical wavelength. A first beam splitter disposed at an intersection of the first beam path and the second beam path. The first beam splitter is configured to superimpose the first and second light beams to form a third light beam, the third light beam impinging on a first window of a sample cell. The sample cell defines an interior volume and is configured to transfer the third light beam from the first window to a second window along a light path within the interior volume. The light path comprises a plurality of segments. The third light beam undergoes at least one reflection at an end of each segment, wherein the light path passes through a gas sample disposed within the interior volume.

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.