Abstract: An optical measurement apparatus operable with a test specimen has a light source with a laser having an output beam, and a beam splitter that splits the output beam of the laser into a first split beam and a second split beam. A test specimen holder holds the test specimen therein. A first optical fiber receives the first split beam and directs the first split beam against the test specimen in the test specimen holder. The apparatus further includes an instrumentation module. A second optical fiber receives the second split beam and conducts the second split beam to the instrumentation module. A third optical fiber receives signal light from the test specimen in the test specimen holder and conducts the signal light to the instrumentation module.

Abstract: An optical fiber and an optical component, such as a collimating lens, are positioned along an optical axis. An alignment end of the optical fiber is first positioned so that the optical fiber axis is coincident with the optical axis, and visible light passing through the optical fiber is focused upon an imaging light detector, without the optical component present on the optical axis. The optical component is inserted onto the optical axis and coarse positioned using visible light transmitted through the optical fiber and through the optical component to be incident upon a light energy detector. The optical component is thereafter fine positioned using infrared light transmitted through the optical fiber and through the optical component to be incident upon the imaging light detector. The optical fiber and the optical component are thereafter fixed in position.