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公开(公告)号：WO8707448A3
公开(公告)日：1988-01-28
申请号：PCT/US8700957
申请日：1987-05-01
Applicant: HUGHES AIRCRAFT CO
Inventor： POLLACK SLAVA A , CHANG DAVID B
CPC classification number: H01S3/093 , H01S3/1608 , H01S3/1645
Abstract: The method of producing at least quasi-continuous lasing operation between initial and terminal lasing states comprising the steps of selecting a laser medium and cavity configuration (lasing frequency) with the laser medium containing upconverting material which provides for the exchange of energy between sufficient number of electrons at the terminal lasing state (manifold) so as to maintain population inversion between the initial and terminal lasing states during the lasing operation; and applying excitation energy of a suitable amount to the laser medium during at least a quasi-continuous time period.
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公开(公告)号：CA2039200C
公开(公告)日：1994-03-22
申请号：CA2039200
申请日：1991-03-27
Applicant: HUGHES AIRCRAFT CO
Inventor： POLLACK SLAVA A
IPC: G02B27/00 , G02F2/02 , G09F9/00 , G09G3/02 , G21K4/00 , H01S3/00 , H01S3/108 , H04N9/31 , H01L31/16
Abstract: FULL COLOR UPCONVERSION DISPLAY Full color alphanumeric or image displays are produced by upconverting near infrared radiation into visible light. The display system includes an upconverting screen including a host material doped with rare earth ions. The screen may be divided into pixels which may be selectively excited by infrared radiation to emit visible light of a desired color. An intensity-modulated infrared laser beam is scanned across the surface of the screen to selectively excite the screen pixels and produce the desired image.
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公开(公告)号：CA1295048C
公开(公告)日：1992-01-28
申请号：CA542927
申请日：1987-07-24
Applicant: HUGHES AIRCRAFT CO
Inventor： POLLACK SLAVA A , SHIH I-FU , TZENG ROBERT
Abstract: APPARATUS FOR MEASURING PROPERTIES OF A LASER EMISSION Apparatus is provided for measuring the numerical aperture of an optical fiber in the infrared region. The optical fiber is appropriately mounted in accordance with conventional testing standards. Infrared energy is transmitted through the optical fiber. At a predetermined distance from the end of the optical fiber, a conversion screen can be provided for transforming the emitted infrared energy into a lesser wavelength of energy. The energy distribution can be recorded with a detector compatible with the lesser wavelength energy whereby the numerical aperture can be computed from the recorded data.
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公开(公告)号：AU7431491A
公开(公告)日：1991-11-07
申请号：AU7431491
申请日：1991-04-10
Applicant: HUGHES AIRCRAFT CO
Inventor： CHANG DAVID B , POLLACK SLAVA A , SHIH I-FU , JICHA ALBERT J
IPC: B05D5/00 , B05D7/00 , B05D7/14 , B05D7/24 , C03C17/22 , C03C17/34 , C09D5/00 , G02B5/28 , B60J1/00 , B60J3/00 , E06B5/00 , C03C17/23 , C03C4/08
Abstract: Selective emissivity coatings are disclosed for temperature reduction of enclosures such as vehicles and building structures. The coating includes a selective emissivity material such as silicon-oxy-nitride having a desired thermal emissivity function which is high in the 8-13 micron wavelength region, and low elsewhere except in the visible wavelength region. The material provides a mechanism for radiative cooling of the enclosure by converting the blackbody radiation of the enclosure, which would be reflected by the earth's atmosphere, into far infrared radiation which is transmitted by the atmosphere. According to another aspect of the invention, the coating further comprises a semimetal which is reflective of radiation in the near infrared region, thereby reducing the solar heat load on the enclosure. One suitable semimetal is LaB6. The coating may be applied to the exterior surface of vehicle and building windows, or to the exterior, non-window surfaces of building structures. For the latter, the coating may take the form of a conventional paint to which is added tiny particles of the semimetal and selective emissivity materials to achieve the radiative cooling and reflection of incident infrared radiation.
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公开(公告)号：CA2039200A1
公开(公告)日：1991-11-02
申请号：CA2039200
申请日：1991-03-27
Applicant: HUGHES AIRCRAFT CO
Inventor： POLLACK SLAVA A
IPC: G02B27/00 , G02F2/02 , G09F9/00 , G09G3/02 , G21K4/00 , H01S3/00 , H01S3/108 , H04N9/31 , H01L31/16
Abstract: Full color alphanumeric or image displays are produced by upconverting near infrared radiation into visible light. The display system includes an upconverting screen including a host material doped with rare earth ions. The screen may be divided into pixels which may be selectively excited by infrared radiation to emit visible light of a desired color. An intensity-modulated infrared laser beam is scanned across the surface of the screen to selectively excite the screen pixels and produce the desired image.
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Patent Agency Ranking
公开(公告)号：CA2039109A1
公开(公告)日：1991-10-24
申请号：CA2039109
申请日：1991-03-26
Applicant: HUGHES AIRCRAFT CO
Inventor： CHANG DAVID B , JICHA ALBERT J , POLLACK SLAVA A , SHIH I-FU
IPC: B05D5/00 , B05D7/00 , B05D7/14 , B05D7/24 , C03C17/22 , C03C17/34 , C09D5/00 , G02B5/28 , G02B5/26 , C03C3/04 , C03C8/20 , C03C8/22
Abstract: SELECTIVE EMISSIVITY COATINGS FOR INTERIOR TEMPERATURE REDUCTION OF AN ENCLOSURE Selective emissivity coatings are disclosed for temperature reduction of enclosures such as vehicles and building structures. The coating includes a selective emissivity material such as silicon-oxy-nitride having a desired thermal emissivity function which is high in the 8-13 micron wavelength region, and low elsewhere except in the visible wavelength region. The material provides a mechanism for radiative cooling of the enclosure by converting the blackbody radiation of the enclosure, which would be reflected by the earth's atmosphere, into far infrared radiation which is transmitted by the atmosphere. According to another aspect of the invention, the coating further comprises a semimetal which is reflective of radiation in the near infrared region, thereby reducing the solar heat load on the enclosure. One suitable semimetal is LaB6. The coating may be applied to the exterior surface of vehicle and building windows, or to the exterior, non-window surfaces of building structures. For the latter, the coating may take the form of a conventional paint to which is added tiny particles of the semimetal and selective emissivity materials to achieve the radiative cooling and reflection of incident infrared radiation.
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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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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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