Abstract: A calibration system for a passive millimeter-wave (PMMW) camera. The calibration system includes a thermal calibrator having a first thermally conducting body, a second thermally conducting body, a first black body target mounted to a front surface of the first conducting body, a second black body target mounted to a front surface of the second conducting body, and a thermo-electric (TE) cooling device having a hot side and a cold side. The hot side of the TE cooling device is thermally attached to the first conducting body and the cold side of the TE cooling device is thermally attached to the second conducting body.

Abstract: A calibration system for a passive millimeter-wave (PMMW) camera. The calibration system includes a thermal calibrator having a first thermally conducting body, a second thermally conducting body, a first black body target mounted to a front surface of the first conducting body, a second black body target mounted to a front surface of the second conducting body, and a thermo-electric (TE) cooling device having a hot side and a cold side. The hot side of the TE cooling device is thermally attached to the first conducting body and the cold side of the TE cooling device is thermally attached to the second conducting body.

Abstract: An imaging system is provided. The system includes a receiver to passively receive a millimeter wave (MMW) power level input from a scene and generates an analog output signal. A driver circuit receives the analog output signal and generates a drive output signal based on the amplitude of the analog output signal. A wavelength converter generates a light intensity output is a replica of a portion of the scene associated with the MMW power level input at a different wavelength range than the MMW power level input wavelength range.

Abstract: A system for detecting and analyzing chemical and biological materials in a sample. The system includes a spectrometer for passively receiving emissions from the sample in the terahertz frequency band to detect the materials therein. A telescope or other device can be used to confine the field-of-view of the spectrometer. A cold surface is positioned filling the field-of-view of the spectrometer at an opposite side of the sample from the spectrometer. The cold surface provides a low temperature background relative to the sample so as to reduce the background emission and enhance the detection of the emission from the sample.

Abstract: Adding a quantity of metallic shot or particles of other materials having a high dielectric constant to the thermoplastic paint in the mixing pot of ordinary roadway marker fixation equipment, which extrudes the paint and applies same to the roadway surface, enhances the MMW radiometric visibility of the marker without adverse effect to the affixation equipment. Vehicles containing MMW radiometers directed down toward the roadway surface moves along the roadway surface is able to automatically sense microwave/millimeter wave energy from a marker in the vehicles path. In one system, the sensed energy is used in conjunction with other apparatus to assist to guide the vehicle within a traffic lane. In another system, the sensed energy is decoded and displayed as pertinent information for the vehicle's driver.

Abstract: Adding a quantity of metallic shot or particles of other materials having a high dielectric constant to the thermoplastic paint in the mixing pot of ordinary roadway marker fixation equipment, which extrudes the paint and applies same to the roadway surface, enhances the MMW radiometric visibility of the marker without adverse effect to the affixation equipment. Vehicles containing MMW radiometers directed down toward the roadway surface moves along the roadway surface is able to automatically sense microwave/millimeter wave energy from a marker in the vehicles path. In one system, the sensed energy is used in conjunction with other apparatus to assist to guide the vehicle within a traffic lane. In another system, the sensed energy is decoded and displayed as pertinent information for the vehicle's driver.

Abstract: Adding a quantity of metallic shot or particles of other materials having a high dielectric constant to the thermoplastic paint in the mixing pot of ordinary roadway marker fixation equipment, which extrudes the paint and applies same to the roadway surface, enhances the MMW radiometric visibility of the marker without adverse effect to the affixation equipment. Vehicles containing MMW radiometers directed down toward the roadway surface moves along the roadway surface is able to automatically sense microwave/millimeter wave energy from a marker in the vehicles path. In one system, the sensed energy is used in conjunction with other apparatus to assist to guide the vehicle within a traffic lane. In another system, the sensed energy is decoded and displayed as pertinent information for the vehicle's driver.

Abstract: An anti-reflection coating for optical elements and a method for forming an anti-reflection coating on an optical element includes one or more layers of a woven plastic mesh material that may be layered on the surface of an optical element such as the lens and secured thereto with a suitable adhesiveor pressed on to the surface by either a peripheral retaining ring or bodily pressed in place by a low loss, low dielectric medium. The number and thickness of the layers of the woven plastic mesh material are selected to provide optimal reduction of reflection losses.

Abstract: A rotating mirror drum radiometer imaging apparatus. The apparatus generally comprises a two-sided mirror, a drum for securely supporting the two-sided mirror therein at an angle of preferably about 45 degrees relative to a longitudinal axis of symmetry extending through the drum, support walls for supporting the drum for rotational movement, and a motor and drive wheel for rotationally driving the drum. In the preferred embodiment the drum includes first and second cut-outs in a side surface thereof. The cut-outs are further spaced preferably about 180 degrees from each other about the longitudinal axis of symmetry and enable a transmitted signal to be alternately received therethrough by first and second sides of the two-sided mirror as the drum and mirror are concurrently rotated by the motor and drive wheel. A first antenna is disposed adjacent a first end of the drum and a second antenna is disposed adjacent a second end of the drum.