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公开(公告)号：DE69110340D1
公开(公告)日：1995-07-20
申请号：DE69110340
申请日：1991-04-09
Applicant: HUGHES AIRCRAFT CO
Inventor： DRUMMOND JAMES E , SHIH I-FU
Abstract: This invention relates to a dispersive holographic spectrometer (12) for analyzing radiation from an infrared source (16). The holographic spectrometer (12) comprises a piezoelectric block (40) having a holographic lens (38) on one face, an array of detectors (36) on another face and a pair of vernier electrodes (32, 34) on opposite faces. Radiation from the source (16) incident upon the holographic lens (38) is dispersed into component wavelengths (44, 46) and directed towards the detector array (36). The holographic lens (38) has a holographic interference pattern recorded on it such that radiation of predetermined wavelength components are dispersed sufficiently enough such that radiation of specific wavelengths falls on different detector elements (48) of the detector array (36). By applying a voltage to the electrodes (32, 38), an electric field is created within the piezoelectric block (40) such that it is either compressed or expanded. This change in the piezoelectric block (40) alters the direction of the radiation from the holographic lens (38) to the detector array (36). Therefore, misalignment of the source (16) with the holographic lens (38) can be compensated for such that piezoelectric adjustment of the block (40) will make the radiation of individual wavelengths fall on the desired detector element (48). Further, radiation from different wavelengths can be directed from one detector element to another. The detector array (36) is self-scanning such that an absorption spectrum can be measured and recorded over a range of frequencies.
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公开(公告)号：DE69101652T2
公开(公告)日：1994-07-28
申请号：DE69101652
申请日：1991-02-20
Applicant: HUGHES AIRCRAFT CO
Inventor： CHANG DAVID B , DRUMMOND JAMES E , POLLACK SLAVA A , SHIH I-FU
Abstract: An improved curing oven is disclosed. The present invention 10 provides an improved curing oven which cures materials with electromagnetic radiation in the ultraviolet region. The invention consists of a surface 12 lined with a layer of material 14 effective to radiate ultraviolet radiation in response to the application of infrared radiation. In a specific illustrative implementation, the invention 10 includes a second surface 18 overlying the first surface 12 providing a passageway therebetween. The oven temperature is set and maintained by a conventional temperature controller 20. The temperature controller 20 measures the oven temperature and controls a valve 22 which adjusts the gas pressure from a gas supply 24 to a set of oven burners 26. Air is supplied through inlet ports 28 included in the second surface 18.
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公开(公告)号：DE69101652D1
公开(公告)日：1994-05-19
申请号：DE69101652
申请日：1991-02-20
Applicant: HUGHES AIRCRAFT CO
Inventor： CHANG DAVID B , DRUMMOND JAMES E , POLLACK SLAVA A , SHIH I-FU
Abstract: An improved curing oven is disclosed. The present invention 10 provides an improved curing oven which cures materials with electromagnetic radiation in the ultraviolet region. The invention consists of a surface 12 lined with a layer of material 14 effective to radiate ultraviolet radiation in response to the application of infrared radiation. In a specific illustrative implementation, the invention 10 includes a second surface 18 overlying the first surface 12 providing a passageway therebetween. The oven temperature is set and maintained by a conventional temperature controller 20. The temperature controller 20 measures the oven temperature and controls a valve 22 which adjusts the gas pressure from a gas supply 24 to a set of oven burners 26. Air is supplied through inlet ports 28 included in the second surface 18.
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公开(公告)号：AU4474293A
公开(公告)日：1993-10-28
申请号：AU4474293
申请日：1993-08-19
Applicant: HUGHES AIRCRAFT CO
Inventor： CHANG DAVID B , POLLACK SLAVA A , SHIH I-FU , DRUMMOND JAMES E
Abstract: A method and a coating for minimizing the temperature increase of a vehicle 10 under illumination by solar radiation 20. The method of the present invention includes the step of determining a first spectrum of wavelengths over which the vehicle 10 emits substantial electromagnetic energy. The method further includes the step of applying a selectively reflective paint coating to the vehicle 10. The applied paint coating substantially absorbs electromagnetic energy over the first wavelength spectrum and substantially reflects electromagnetic radiation over a second wavelength spectrum not overlapping the first spectrum.
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公开(公告)号：AU7821691A
公开(公告)日：1992-02-27
申请号：AU7821691
申请日：1991-06-05
Applicant: HUGHES AIRCRAFT CO
Inventor： CHANG DAVID B , DRUMMOND JAMES E
Abstract: An infrared holographic defect detector (10) comprises a far infrared pulsed coherent source (14) of infrared radiation which provides infrared radiation. The radiation is directed at a generally non-reflective surface (12), for example, a surface of an automobile body having a matt grey pre-coat thereon. A semi-transparent mirror (15) is placed in the path of the radiation to provide a reference beam (17) therefrom. An infrared detector (18) and a charge-coupled device (20) receives the radiation reflected from the surface and the reference signal. A comparator (22) compares the received reflected information and the reference signal and, preferably, information from a source (24) which defines a desired surface configuration in order to derive a quantitative measurement of the surface. A monitor (26) visually displays the quantitative measurement and location of any dents in the surface. To avoid a requirement that sequential automobile doors containing the surface of investigation be three-dimensionally aligned to within microns of reference points, a detector of the reflected radiation can be translated and rotated. A number of sensed images of the surface are taken, one at each of the different positions of the detector. For each image a measure of its correlation with the standard image is made.
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Patent Agency Ranking
公开(公告)号：BR9102380A
公开(公告)日：1992-01-14
申请号：BR9102380
申请日：1991-06-07
Applicant: HUGHES AIRCRAFT CO
Inventor： CHANG DAVID B , DRUMMOND JAMES E
Abstract: An infrared holographic defect detector (10) comprises a far infrared pulsed coherent source (14) of infrared radiation which provides infrared radiation. The radiation is directed at a generally non-reflective surface (12), for example, a surface of an automobile body having a matt grey pre-coat thereon. A semi-transparent mirror (15) is placed in the path of the radiation to provide a reference beam (17) therefrom. An infrared detector (18) and a charge-coupled device (20) receives the radiation reflected from the surface and the reference signal. A comparator (22) compares the received reflected information and the reference signal and, preferably, information from a source (24) which defines a desired surface configuration in order to derive a quantitative measurement of the surface. A monitor (26) visually displays the quantitative measurement and location of any dents in the surface. To avoid a requirement that sequential automobile doors containing the surface of investigation be three-dimensionally aligned to within microns of reference points, a detector of the reflected radiation can be translated and rotated. A number of sensed images of the surface are taken, one at each of the different positions of the detector. For each image a measure of its correlation with the standard image is made.
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公开(公告)号：NO911422D0
公开(公告)日：1991-04-11
申请号：NO911422
申请日：1991-04-11
Applicant: HUGHES AIRCRAFT CO
Inventor： DRUMMOND JAMES E , SHIH I-FU
Abstract: This invention relates to a dispersive holographic spectrometer (12) for analyzing radiation from an infrared source (16). The holographic spectrometer (12) comprises a piezoelectric block (40) having a holographic lens (38) on one face, an array of detectors (36) on another face and a pair of vernier electrodes (32, 34) on opposite faces. Radiation from the source (16) incident upon the holographic lens (38) is dispersed into component wavelengths (44, 46) and directed towards the detector array (36). The holographic lens (38) has a holographic interference pattern recorded on it such that radiation of predetermined wavelength components are dispersed sufficiently enough such that radiation of specific wavelengths falls on different detector elements (48) of the detector array (36). By applying a voltage to the electrodes (32, 38), an electric field is created within the piezoelectric block (40) such that it is either compressed or expanded. This change in the piezoelectric block (40) alters the direction of the radiation from the holographic lens (38) to the detector array (36). Therefore, misalignment of the source (16) with the holographic lens (38) can be compensated for such that piezoelectric adjustment of the block (40) will make the radiation of individual wavelengths fall on the desired detector element (48). Further, radiation from different wavelengths can be directed from one detector element to another. The detector array (36) is self-scanning such that an absorption spectrum can be measured and recorded over a range of frequencies.
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公开(公告)号：AU7911491A
公开(公告)日：1992-01-09
申请号：AU7911491
申请日：1991-06-18
Applicant: HUGHES AIRCRAFT CO
Inventor： DRUMMOND JAMES E , CHANG DAVID B , JOYCE ALEXANDER H
Abstract: A time-efficient method for smoothing a surface 20 of an applied coating composition 22 is disclosed herein. In particular, the present invention sets forth a technique for expediting the subsidence of coating surface irregularities R1, R2. The technique of the present invention is applied subsequent to the application of the coating composition 22 to an electrically conductive object 24, which results in the formation of a coating surface 20. The technique of the present invention includes the step of generating electrically charged particles 40 in a volume of space adjacent to the coating surface 20. The charged particles 40 cause an electric field to develop across the coating composition 22, which induces the charged particles 40 to exert pressure on the coating surface 20.
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公开(公告)号：CA2038602A1
公开(公告)日：1991-10-24
申请号：CA2038602
申请日：1991-03-19
Applicant: HUGHES AIRCRAFT CO
Inventor： CHANG DAVID B , SHIH I-FU , POLLACK SLAVA A , DRUMMOND JAMES E
Abstract: A method and a coating for minimizing the temperature increase of a vehicle 10 under illumination by solar radiation 20. The method of the present invention includes the step of determining a first spectrum of wavelengths over which the vehicle 10 emits substantial electromagnetic energy. The method further includes the step of applying a selectively reflective paint coating to the vehicle 10. The applied paint coating substantially absorbs eleatromagnetic energy over the first wavelength spectrum and substantially reflects electromagnetic radiation over a second wavelength spectrum not overlapping the first spectrum.
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公开(公告)号：AU7431891A
公开(公告)日：1991-10-24
申请号：AU7431891
申请日：1991-04-10
Applicant: HUGHES AIRCRAFT CO
Inventor： CHANG DAVID B , POLLACK SLAVA A , SHIH I-FU , DRUMMOND JAMES E
Abstract: A method and a coating for minimizing the temperature increase of a vehicle 10 under illumination by solar radiation 20. The method of the present invention includes the step of determining a first spectrum of wavelengths over which the vehicle 10 emits substantial electromagnetic energy. The method further includes the step of applying a selectively reflective paint coating to the vehicle 10. The applied paint coating substantially absorbs electromagnetic energy over the first wavelength spectrum and substantially reflects electromagnetic radiation over a second wavelength spectrum not overlapping the first spectrum.
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