Abstract: A multiwavelength holographic imaging apparatus uses a frequency converter for converting input tunable coherent light having a wavelength tunable around a wavelength ?2 to tunable output coherent light having a wavelength tunable around a wavelength ?1, wherein the image receiver receiving the holographic image is sensitive to the light of wavelength ?1. The image receiver may not be sensitive to light of wavelength ?2, for example if ?2 is in the infrared spectral region greater than 1.3 microns.

Abstract: An intercooler assembly for cooling charge air to be delivered to an internal combustion engine is disclosed. The said assembly is disposed along an axis in the axial direction, including an intercooler housing having a housing cavity for receiving an intercooler core therein. Conventional cooling fluid is channeled axially through an axial chamber of the intercooler core for cooling the core and charge air is channeled around the outer surface of the core for cooling the charge air, wherein the core assembly further including a means for rotating the intercooler core about the axis, thereby increasing the cooling of the charge air as it flows around the outer surface of the intercooler core.

Abstract: A vibration isolation platform having supports such as air pistons to damp out low frequency vibrations is equipped with a means for restricting pitch and roll motion as the weight distribution is changed and the vibration isolation platform exhibits vertical motion. The preferred means for restricting are torsion bars and tension means which transfer force from one part of the platform to the other.

Abstract: A method of combining holograms or phase images of an object is disclosed, where attributes of the data used to record two phase images of overlapping portions of the surface of an object are compared and used to match pixels of the two recordings. A relative tilt angle and direction correction is added, and a third phase image is generated. Phase images of objects which are too large to be imaged in an interferometric imaging system can thus be produced.

Abstract: An optical assembly for use with a spectrophotometer. The optical assembly may comprise an illumination source, a detection sensor, a monitor sensor, and an optical piece having a first side adapted to face a sample. The optical piece may define an illumination channel extending from the illumination source toward the first side. The optical piece may also define a detection channel extending from the first side toward the detection sensor. In addition, the optical piece may define a monitor channel extending from the illumination channel toward the monitor sensor. Also, a light emitting diode (LED) assembly for use with an optical measurement device. The LED assembly may comprise a substrate having a top surface and a bottom surface and a plurality of LED dies positioned on the substrate to emit light in a first direction normal to the bottom surface of the substrate. The LED assembly may also comprise a plurality of leads in electrical contact with the plurality of LED dies.

Abstract: An optical system comprising an optical instrument and a processing unit. The optical instrument may comprise an illumination source and a sensor. The processing unit may comprise a data storage having stored thereon a characterization of the illumination source and a characterization of the sensor. The processing unit may also comprise a computer configured to calculate a system response of the illumination source and the receiving element considering the characterization of the illumination source and the characterization of the receiving element.

Abstract: Multiwavelength interferometric images have the phase and/or frequency of the illuminating light corrected by statistically analyzing the data, and adjusting the phase and/or frequency until a statistical measure reaches a criterion.

Abstract: Data from an imaging interferometer producing at least three interferometric images of a surface of an object using at least three different frequencies of light illuminating the surface of the object is processed through a software data processing pipeline architecture which uses data processed by a plurality of data processors to generate a three dimensional surface profile of the surface of the object.

Abstract: The drift of a laser frequency can be used to improve the imaging of an object where the laser experiences frequency drift for various reasons. The system uses an interferometry method using a laser of nominally fixed—but unknown and changing—frequency and phase angle, for example, attributable to laser drift. The interference pattern is periodically sampled at a frequency considerably higher than the phase shift of the object. The wavelength is reconstructed from the sampled patterns using a correlation algorithm. The phase angle is determined using an n-bucket algorithm. After all of the complex information has been determined at all of the multiple wavelengths, the surface of the object is calculated using conventional interferometry techniques. Accordingly, laser drift—which is typically considered a negative attribute—is used positively to improve imaging techniques.