Not applicable.
Not applicable.
Infrared (IR) gas sensors may be used for analyzing a gas and determining gas density by sensing absorption of infrared light of specific wavelengths. In some cases, optical filters may be used in an IR gas sensor.
For a more complete understanding of the present disclosure, reference is now made to the following brief description, taken in connection with the accompanying drawings and detailed description, wherein like reference numerals represent like parts.
It should be understood at the outset that although illustrative implementations of one or more embodiments are illustrated below, the disclosed systems and methods may be implemented using any number of techniques, whether currently known or not yet in existence. The disclosure should in no way be limited to the illustrative implementations, drawings, and techniques illustrated below, but may be modified within the scope of the appended claims along with their full scope of equivalents.
The following brief definition of terms shall apply throughout the application:
The term “comprising” means including but not limited to, and should be interpreted in the manner it is typically used in the patent context;
The phrases “in one embodiment,” “according to one embodiment,” and the like generally mean that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present invention, and may be included in more than one embodiment of the present invention (importantly, such phrases do not necessarily refer to the same embodiment);
If the specification describes something as “exemplary” or an “example,” it should be understood that refers to a non-exclusive example;
The terms “about” or approximately” or the like, when used with a number, may mean that specific number, or alternatively, a range in proximity to the specific number, as understood by persons of skill in the art field; and
If the specification states a component or feature “may,” “can,” “could,” “should,” “would,” “preferably,” “possibly,” “typically,” “optionally,” “for example,” “often,” or “might” (or other such language) be included or have a characteristic, that particular component or feature is not required to be included or to have the characteristic. Such component or feature may be optionally included in some embodiments, or it may be excluded.
Embodiments of the disclosure relate to systems and methods for filtering unwanted wavelengths from an IR detector. In some embodiments, it may be desired to remove or reduce the wavelengths absorbed by water, to reduce the effects of water on the detection of the target gas. In some embodiments, the IR detector could also be used to remove or reduce the wavelengths absorbed by CO2.
Water Free Quartz or Sapphire is typically used as a window material for flammable point infrared (IR) detectors. In combination with a typical filament or thick film (TF) broadband (BB) source, the spectrum of light propagated through the optical path includes those wavelengths absorbed by water. Interference from water is reduced by the careful selection of the interference filter passband used to determine sample and reference wavelengths. However, due to the proximity of water absorption lines to those wavelengths used for measurement, the effectiveness of this approach is limited by the achievable manufacturing tolerances and stability with temperature of interference filters.
Disclosed herein are filtering materials that can be used to remove (or reduce) the wavelength of light absorbed by water to reduce the sensitivity of a point IR detector to water. Materials that may be used include materials with hydroxyls in their molecular structure. A filter of such material(s) may be added to the optical path of a point IR detector.
Referring to
The radiation source 112 serves to provide radiation in the infrared spectrum to the gas chamber 104. Any suitable source of IR radiation can be used for the radiation source 112, and the radiation source 112 may comprise focusing elements (e.g., lenses, etc.) in addition to radiation emitting elements. In an embodiment, the radiation source can comprise one or more IR lamps, light emitting diodes (LEDs), and the like. An integrated power supply can be coupled to the radiation source 112. For example, a 50 to 500 kHz power supply can be used to power the radiation source 112 to initiate and maintain the discharge of the IR radiation.
The radiation provided by the radiation source 112 can be provided within the chamber 104 or one or more windows can be used to allow the radiation to pass into the chamber and either transmit through the chamber 104 or be absorbed by the gas within the chamber 104. The filter glass 102 or other kind of spectral filter can be used to filter the IR light and allow a desired portion of the IR spectrum to pass through to the sensor(s) 106 and 108. The sensor(s) 106 and 108 can comprise any sensor sensitive to IR radiation in the absorption band of the target gas. The sensors 106 and 108 can comprise thermal detectors (Thermocouples, Thermopiles, Bolometer, Pneumatic cell, Pyroelectric detector or the like) or Quantum detectors (PbS, PbSe, InAs, HgCdTe or the like). The detector 100 may function in a similar fashion to a typical IR detector, as would be understood by those skilled in the art.
In the present embodiment, the material of the filter glass 102 may be chosen to filter specific wavelengths of light, such as those absorbed by water. This may reduce the sensitivity of the detector 100 to water, thereby minimizing the issues of manufacturing tolerance and temperature sensitivity of interference filters. The detector may utilize the spectral absorption properties of certain materials to remove (or reduce) the wavelengths of light absorbed by water from the optical spectrum used for the measurement of gas. The materials that may be used in the filter glass 102 may contain hydroxyls in their molecular structure, for example, Fused Silica. In some embodiments, the filter glass 102 may comprise crown glass (such as BK7).
Crown glass is a type of optical glass used in lenses and other optical components. It has relatively low refractive index (about 1.52) and low dispersion (with Abbe numbers around 60). Crown glass is produced from alkali-lime (RCH) silicates containing approximately 10% potassium oxide and is one of the earliest low dispersion glasses. As well as the specific material named crown glass, there are other optical glasses with similar properties that are also called crown glasses. Generally, this is any glass with Abbe numbers in the range 50 to 85. For example, the borosilicate glass Schott BK7 is an extremely common crown glass, used in precision lenses. Borosilicates contain about 10% boric oxide, have good optical and mechanical characteristics, and are resistant to chemical and environmental damage. Other additives used in crown glasses include zinc oxide, phosphorus pentoxide, barium oxide, fluorite and lanthanum oxide. A concave lens of flint glass is commonly combined with a convex lens of crown glass to produce an achromatic doublet. The dispersions of the glasses partially compensate for each other, producing reduced chromatic aberration compared to a singlet lens with the same focal length.
Referring now to
Further, the transmission characteristics of a material of a given thickness are described by the Beer-Lambert Law which describes the absorbance of a material as a function of its molar absorptivity and the optical path length through the material. Where the molar absorptivity is high, transmission of light through the material is low for all practical values of path length. However, at lower values of molar absorptivity, transmission can be controlled over a wide range of values by adjusting the thickness of the material. Additionally, in some materials the molar absorptivity is seen to be a relatively low function of wavelength over particular ranges of wavelengths. For these materials it is possible to control the effective transmission bandwidth of the material by adjusting its thickness.
In
Therefore, it can be seen that the operating wavelength spectrum of an IR point gas detector can be controlled by the correct selection and dimensioning of the optical windows utilized in its design. For example, a window manufactured from Fused Silica at a thickness of about 3 mm would give a transmission band of about 2900 nm to 4100 nm, or in some cases 2900 nm to 4300 nm.
Some embodiments of the disclosure may comprise a method for filtering specific wavelengths in an IR detector. In some embodiments, the filtering method may specifically target wavelengths of water absorption. The method may comprise adding a filtering material to the IR detector path, where the filtering material comprises hydroxyls in its molecular structure.
Some embodiments of the disclosure may comprise an IR detector comprising a filter glass operable to filter one or more wavelengths from the source light, where the filter glass comprises one or more materials that contain hydroxyls in their molecular structure, and where the spectral absorption properties of the filter glass are operable to at least reduce wavelengths of light absorbed by water from the optical path, thereby reducing the IR detector's cross sensitivity to water.
In some embodiments, the spectral absorption properties of the filter glass are also operable to at least reduce the wavelengths of light absorbed by carbon dioxide (CO2), thereby reducing the IR detector's cross sensitivity to CO2. In some embodiments, the one or more materials comprise Fused Silica. In some embodiments, the one or more materials comprise a crown glass. In some embodiments, the thickness of the filter glass is between about 0.5 mm to 16 mm, 0.7 mm to 10 mm, or 1 mm and 3 mm. In some embodiments, the thickness of the filter glass is about 3 mm. In some embodiments, the thickness of the filter glass is about 2 mm. In some embodiments, the wavelengths that are not filtered by the filter glass are between about 2900 nanometers (nm) to about 4100 nm. In some embodiments, the wavelengths filtered by the filter glass are less about 3000 nm. In some embodiments, the wavelengths filtered by the filter glass are greater than about 4000 nm. In some embodiments, the IR detector may further comprise a source light, a gas chamber, and one or more detectors. In some embodiments, the filter glass is located between the source and the one or more sensors within the IR detector. In some embodiments, the filter glass is located between the source and the gas chamber within IR detector. In some embodiments, the filter glass is attached to one of the sensors.
While various embodiments in accordance with the principles disclosed herein have been shown and described above, modifications thereof may be made by one skilled in the art without departing from the spirit and the teachings of the disclosure. The embodiments described herein are representative only and are not intended to be limiting. Many variations, combinations, and modifications are possible and are within the scope of the disclosure. Alternative embodiments that result from combining, integrating, and/or omitting features of the embodiment(s) are also within the scope of the disclosure. Accordingly, the scope of protection is not limited by the description set out above, but is defined by the claims which follow, that scope including all equivalents of the subject matter of the claims. Each and every claim is incorporated as further disclosure into the specification and the claims are embodiment(s) of the present invention(s). Furthermore, any advantages and features described above may relate to specific embodiments, but shall not limit the application of such issued claims to processes and structures accomplishing any or all of the above advantages or having any or all of the above features.
Additionally, the section headings used herein are provided for consistency with the suggestions under 37 C.F.R. 1.77 or to otherwise provide organizational cues. These headings shall not limit or characterize the invention(s) set out in any claims that may issue from this disclosure. Specifically and by way of example, although the headings might refer to a “Field,” the claims should not be limited by the language chosen under this heading to describe the so-called field. Further, a description of a technology in the “Background” is not to be construed as an admission that certain technology is prior art to any invention(s) in this disclosure. Neither is the “Summary” to be considered as a limiting characterization of the invention(s) set forth in issued claims. Furthermore, any reference in this disclosure to “invention” in the singular should not be used to argue that there is only a single point of novelty in this disclosure. Multiple inventions may be set forth according to the limitations of the multiple claims issuing from this disclosure, and such claims accordingly define the invention(s), and their equivalents, that are protected thereby. In all instances, the scope of the claims shall be considered on their own merits in light of this disclosure, but should not be constrained by the headings set forth herein.
Use of broader terms such as comprises, includes, and having should be understood to provide support for narrower terms such as consisting of, consisting essentially of, and comprised substantially of. Use of the term “optionally,” “may,” “might,” “possibly,” and the like with respect to any element of an embodiment means that the element is not required, or alternatively, the element is required, both alternatives being within the scope of the embodiment(s). Also, references to examples are merely provided for illustrative purposes, and are not intended to be exclusive.
While several embodiments have been provided in the present disclosure, it should be understood that the disclosed systems and methods may be embodied in many other specific forms without departing from the spirit or scope of the present disclosure. The present examples are to be considered as illustrative and not restrictive, and the intention is not to be limited to the details given herein. For example, the various elements or components may be combined or integrated in another system or certain features may be omitted or not implemented.
Also, techniques, systems, subsystems, and methods described and illustrated in the various embodiments as discrete or separate may be combined or integrated with other systems, modules, techniques, or methods without departing from the scope of the present disclosure. Other items shown or discussed as directly coupled or communicating with each other may be indirectly coupled or communicating through some interface, device, or intermediate component, whether electrically, mechanically, or otherwise. Other examples of changes, substitutions, and alterations are ascertainable by one skilled in the art and could be made without departing from the spirit and scope disclosed herein.
The resent application claims priority to and is the National Stage of International Application No. PCT/US2016/020637 filed on Mar. 3, 2016 by Marta, et al. and entitled “Use of Selected Glass Types and Glass Thicknesses in the Optical Path to Remove Cross Sensitivity to Water Absorption Peaks”, which claims priority to U.S. Provisional Patent Application Ser. No. 62/128,745 filed on Mar. 5, 2015 by Marta, et al. and entitled “Use of Selected Glass Types and Glass Thicknesses in the Optical Path to Remove Cross Sensitivity to Water Absorption Peaks” both of which are incorporated herein by reference in their entirety.
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/US2016/020637 | 3/3/2016 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2016/141155 | 9/9/2016 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
2424976 | Golay et al. | Aug 1947 | A |
2924713 | Liston | Feb 1960 | A |
4370553 | Waycaster et al. | Jan 1983 | A |
4436428 | Watanabe et al. | Mar 1984 | A |
4492862 | Grynberg et al. | Jan 1985 | A |
4535241 | Eberhardt | Aug 1985 | A |
4557603 | Oehler et al. | Dec 1985 | A |
4692622 | Taniguchi et al. | Sep 1987 | A |
4736103 | Nelson et al. | Apr 1988 | A |
4738266 | Thatcher | Apr 1988 | A |
4740086 | Oehler et al. | Apr 1988 | A |
4891629 | Gajjar et al. | Jan 1990 | A |
4903248 | Fertig | Feb 1990 | A |
5055690 | Bonne | Oct 1991 | A |
5394934 | Rein et al. | May 1995 | A |
5468961 | Gradon et al. | Nov 1995 | A |
5498873 | Liebermann et al. | Mar 1996 | A |
5559333 | Araya et al. | Sep 1996 | A |
5616826 | Pellaux | Apr 1997 | A |
5760407 | Margosiak | Jun 1998 | A |
5772606 | Ashibe | Jun 1998 | A |
5886249 | Bonne et al. | Mar 1999 | A |
5892140 | Wood | Apr 1999 | A |
6067840 | Chelvayohan et al. | May 2000 | A |
6222190 | Bernstein et al. | Apr 2001 | B1 |
6327896 | Veronesi et al. | Dec 2001 | B1 |
6469303 | Sun et al. | Oct 2002 | B1 |
6552792 | Pilgrim et al. | Apr 2003 | B1 |
6628396 | Gul | Sep 2003 | B1 |
6853449 | Hocker | Feb 2005 | B2 |
6878940 | Nakamura et al. | Apr 2005 | B2 |
7034943 | Moeckli et al. | Apr 2006 | B1 |
7045784 | Ptasinski et al. | May 2006 | B1 |
7214939 | Wong | May 2007 | B1 |
7288766 | Uchida et al. | Oct 2007 | B2 |
7477993 | Sunshine et al. | Jan 2009 | B2 |
7663756 | Cole | Feb 2010 | B2 |
7738116 | Kauppinen | Jun 2010 | B2 |
7797983 | Kauppinen | Sep 2010 | B2 |
7808640 | Fritz et al. | Oct 2010 | B2 |
7835004 | Uber et al. | Nov 2010 | B2 |
7895880 | Fritz et al. | Mar 2011 | B2 |
7958771 | Rezachek | Jun 2011 | B2 |
7961313 | Van Neste et al. | Jun 2011 | B2 |
8085403 | Fritz et al. | Dec 2011 | B2 |
8217355 | Wong | Jul 2012 | B1 |
8312758 | Tobias | Nov 2012 | B2 |
8322191 | Fritz | Dec 2012 | B2 |
8373568 | Moe et al. | Feb 2013 | B2 |
8415626 | Wong | Apr 2013 | B1 |
8451447 | Fritz et al. | May 2013 | B2 |
8497996 | Kauppinen | Jul 2013 | B2 |
8584508 | Rezachek | Nov 2013 | B2 |
8594507 | Youngner et al. | Nov 2013 | B2 |
8661874 | Rezachek | Mar 2014 | B2 |
8689607 | Rezachek et al. | Apr 2014 | B2 |
8695402 | Thorson | Apr 2014 | B2 |
8701465 | Shubinsky et al. | Apr 2014 | B2 |
8746038 | Rezachek | Jun 2014 | B2 |
8806916 | Gautieri | Aug 2014 | B2 |
8848191 | Lust | Sep 2014 | B2 |
8939006 | Rezachek et al. | Jan 2015 | B2 |
9086364 | Rezachek et al. | Jul 2015 | B2 |
9243998 | Avramescu et al. | Jan 2016 | B2 |
9606049 | Yang et al. | Mar 2017 | B1 |
9829428 | Yang et al. | Nov 2017 | B2 |
10393591 | Yang et al. | Aug 2019 | B2 |
10458900 | Marta et al. | Oct 2019 | B2 |
20040036023 | Hodgkinson | Feb 2004 | A1 |
20060138327 | Kauppinen | Jun 2006 | A1 |
20060175547 | DiFoggio et al. | Aug 2006 | A1 |
20080035848 | Wong | Feb 2008 | A1 |
20080277586 | Cardinale | Nov 2008 | A1 |
20110032514 | Bitter et al. | Feb 2011 | A1 |
20110249262 | Russell | Oct 2011 | A1 |
20110296900 | Thorson | Dec 2011 | A1 |
20120055232 | Thomson | Mar 2012 | A1 |
20130008229 | Avramescu et al. | Jan 2013 | A1 |
20130086977 | Wong | Apr 2013 | A1 |
20130111975 | Gautieri | May 2013 | A1 |
20130334423 | Henderson | Dec 2013 | A1 |
20140091014 | Wagner et al. | Apr 2014 | A1 |
20150101395 | Dehe et al. | Apr 2015 | A1 |
20170102318 | Yang et al. | Apr 2017 | A1 |
20170115207 | Yang et al. | Apr 2017 | A1 |
20180045563 | Marta et al. | Feb 2018 | A1 |
20180284012 | Marta et al. | Oct 2018 | A1 |
20180299330 | Yang et al. | Oct 2018 | A1 |
20180299369 | Marta et al. | Oct 2018 | A1 |
Number | Date | Country |
---|---|---|
582290 | Mar 1989 | AU |
1685216 | Oct 2005 | CN |
1928531 | Mar 2007 | CN |
101303298 | Nov 2008 | CN |
101949821 | Jan 2011 | CN |
108351293 | Jul 2018 | CN |
108351294 | Jul 2018 | CN |
108369139 | Aug 2018 | CN |
2926662 | Jan 1981 | DE |
3508027 | Sep 1986 | DE |
19841491 | Nov 2008 | DE |
102007020596 | Nov 2008 | DE |
102008018504 | Oct 2009 | DE |
102012217479 | Oct 2013 | DE |
1546683 | Aug 2004 | EP |
1831671 | Sep 2007 | EP |
2060891 | May 2009 | EP |
2148184 | Jan 2010 | EP |
2402735 | Jan 2012 | EP |
2148184 | Dec 2012 | EP |
3265766 | Jan 2018 | EP |
3347697 | Jul 2018 | EP |
3347698 | Jul 2018 | EP |
3359933 | Aug 2018 | EP |
3359934 | Aug 2018 | EP |
710867 | Jun 1954 | GB |
2358245 | Jul 2001 | GB |
288304 | Oct 2017 | IN |
01-172428 | Jul 1989 | JP |
H05172627 | Jul 1993 | JP |
H05172628 | Jul 1993 | JP |
05-272628 | Oct 1993 | JP |
408184501 | Jul 1996 | JP |
H10332579 | Dec 1998 | JP |
H1172428 | Mar 1999 | JP |
2002-328116 | Nov 2002 | JP |
2007170841 | Jul 2007 | JP |
2009257808 | Nov 2009 | JP |
2010126465 | Jun 2010 | JP |
2010128781 | Jun 2010 | JP |
5028080 | Sep 2012 | JP |
158463 | Feb 2010 | SG |
9624831 | Aug 1996 | WO |
9812522 | Mar 1998 | WO |
2008074442 | Jun 2008 | WO |
2016141155 | Sep 2016 | WO |
2017044435 | Mar 2017 | WO |
2017044436 | Mar 2017 | WO |
2017062617 | Apr 2017 | WO |
2017062626 | Apr 2017 | WO |
Entry |
---|
Feiertag G et al.: “Flip Chip MEMS microphone package with large acoustic reference volume”, Procedia Engineering, Elsevier, Amsterdam, NL, vol. 5, Jan. 1, 2010, pp. 355-358. |
PCT Application No. PCT/US2016/020637, International Search Report, dated Jun. 15, 2016, 3 pages. |
PCT Application No. PCT/US2016/020637, Written Opinion of the International Searching Authority, dated Jun. 15, 2016, 6 pages. |
PCT Application No. PCT/US2016/020637, International Preliminary Report on Patentability, dated Sep. 5, 2017, 7 pages. |
Europe Patent Application No. 16710887.7, Communication pursuant to Rules 161(1) and 162 EPC, dated Oct. 12, 2017, 2 pages. |
PCT Application No. PCT/US2016/050455, International Search Report, dated Dec. 7, 2016, 5 pages. |
PCT Application No. PCT/US2016/050455, Written Opinion of the International Searching Authority, dated Dec. 7, 2016, 7 pages. |
Dundas M E: “New Technologies in Infrared Hydrocarbon Detection”, ISA Transactions, Instrument Society of America, Pittsburgh, U.S., vol. 31, No. 4, 1992, pp. 51-65. |
Anonymous: “Flammability limit—Wikipedia, the free encyclopedia”, Oct. 21, 2014 (Oct. 21, 2014), Retrieved from the Internet: URL: http://web.archive.org/web/20141021101901/http://en.wikipedia.org/wiki/Flammability_limit [retrieved on Nov. 24, 2016] substance table with LEL values; p. 4-p. 8. |
PCT Application No. PCT/US2016/050456, International Search Report, dated Dec. 12, 2016, 5 pages. |
PCT Application No. PCT/US2016/050456, Written Opinion of the International Searching Authority, dated Dec. 12, 2016, 7 pages. |
PCT Application No. PCT/US2016/055759, International Search Report, dated Jan. 23, 2017, 4 pages. |
PCT Application No. PCT/US2016/055759, Written Opinion of the International Searching Authority, dated Jan. 23, 2017, 7 pages. |
David Klocke et al: “Infrared receptors in pyrophilous (“fire loving”) insects as model for new un-cooled infrared sensors”. Beilstein Journal of Nanotechnology, vol. 2, Mar. 30, 2011, pp. 186-197. |
PCT Application No. PCT/US2016/055748, International Search Report, dated Dec. 23, 2016, 4 pages. |
PCT Application No. PCT/US2016/055748, Written Opinion of the International Searching Authority, dated Dec. 23, 2016, 7 pages. |
Yamashita K et al.: “Miniaturized infrared sensor using silicon diaphragm based on Golay cell”, Sensors and Actuators A:L Physical, Elsevier BV, NL, vol. 66, No. 1-3, Apr. 1, 1998, pp. 29-32. |
Feiertag G et al.: “Flip Chip MEMS microphone package with large acoustic volume”, Procedia Engineering, Elsevier, Amsterdam, NL, vol. 5, Jan. 1, 2010, pp. reference 355-358. |
Kari Schjølberg-Henriksen et al.: “Sensitive and Selective Photo Acoustic Gas Sensor Suitable for High Volume Manifacturing”, IEEE Sensors 2006, EXCO, Deagu Korea, Oct. 22-25, 2006, pp. 679-682. |
U.S. Appl. No. 14/879,920, Notice of Allowance, dated Oct. 7, 2016, 15 pages. |
U.S. Appl. No. 14/879,920, Corrected Notice of Allowability, dated Feb. 22, 2017, 6 pages. |
U.S. Appl. No. 15/400,554, Office Action, dated Mar. 3, 2017, 16 pages. |
U.S. Appl. No. 15/400,554, Notice of Allowance, dated Jul. 18, 2017, 16 pages. |
Kari Schjølberg-Henriksen et al., “Sensitive and Selective Photo Acoustic Gas Sensor Suitable for High Volume Manufacturing”, IEEE Sensors Journal, vol. 8, No. 9, Sep. 2008, pp. 1539-1545. |
PCT Application No. PCT/US2016/050455, International Preliminary Report on Patentability, dated Mar. 22, 2018, 9 pages. |
Europe Patent Application No. 16766771.6, Communication Pursuant to Rules 161(1) and 162 EPC, dated Apr. 18, 2018, 3 pages. |
PCT Application No. PCT/US2016/050456,International Preliminary Report on Patentability, dated Mar. 13, 2018, 8 pages. |
U.S. Appl. No. 15/759,158 entitled “Gas Detector With Normalized Response and Improved Sensitivity”, filed Mar. 9, 2018, 49 pages. |
Christopher Grinde et al., “A Clover Shaped Silicon Piezoresistive Microphone for Miniaturized Photoacoustic Gas Sensors,” Symposium on Design, Test, Integration & Packaging of MEMS/MOEMS, 2009. DTIP MEMS/MOEMS 09, pp. 256-260. Retrieved from the Internet < URL: http://www.eda-publishing.org/dtip09_proceedings.pdf#page=270>. |
International Application No. PCT/US2016/055748, International Preliminary Report on Patentability, dated Apr. 10, 2018, 8 pages. |
Europe Patent Application No. 16785292.0, Communication pursuant to Rules 161(1) and 162 EPC, dated May 17, 2018, 3 pages. |
International Application No. PCT/US2016/055759, International Preliminary Report on Patentability dated Apr. 10, 2018, 8 pages. |
Europe Patent Application No. 16784357.2, Communication pursuant to Rules 161(1) and 162 EPC, dated Jun. 7, 2018, 3 pages. |
U.S. Appl. No. 15/759,165 entitled “Gas Detector With Normalized Response and Improved Sensitivity”, filed Mar. 9, 2018, 51 pages. |
U.S. Appl. No. 15/767,100 entitled “Electromagnetic Radiation Detector Using a Planar Golay Cell”, filed Apr. 9, 2018, 21 pages. |
U.S. Appl. No. 15/767,100 Office Action, dated Aug. 31, 2018, 13 pages. |
Europe Patent Application No. 16766770.8, Communication pursuant to Rules 161(1) and 162 EPC, dated Apr. 18, 2017, 3 pages. |
U.S. Appl. No. 15/767,100 Final Office Action, dated Dec. 18, 2018, 7 pages. |
U.S. Appl. No. 15/767,100 Advisory Action, dated Mar. 1, 2019, 3 pages. |
U.S. Appl. No. 15/759,165 Office Action, dated Jan. 25, 2019, 15 pages. |
Annex to the communication dated Mar. 13, 2019 for EP Application No. 16785292. |
CN Office Action dated Aug. 28, 2019 for CN Application No. 201680071989. |
CN Office Action dated May 7, 2020 for CN Application No. 201680071989. |
CN Office Action, including Search Report, dated Apr. 10, 2020 for CN Application No. 201680065487. |
CN Office Action, including Search Report, dated Apr. 23, 2020 for CN Application No. 201680065395. |
CN Search report with English translation dated Apr. 29, 2020 for CN Application No. 201680071989. |
CN Search report with English Translation dated Aug. 19, 2019 for CN Application No. 201680071989. |
Communication from the Examining Division dated Apr. 30, 2019 for EP Application No. 16766771. |
Communication from the Examining Division dated Mar. 13, 2019 for EP Application No. 16785292. |
English Translation of CN Office Action dated Apr. 23, 2020 for CN Application No. 201680065395. |
English Translation of CN Office Action dated Aug. 28, 2019 for CN Application No. 201680071989. |
English Translation of CN Office Action, including Search Report, dated Apr. 10, 2020 for CN Application No. 201680065487. |
Europe Patent Application No. 16766770.8, Communication pursuant to Rules 161(1) and 162 EPC, dated Apr. 17, 2018, corrected date, 3 pages. |
European Patent Application No. 16785292.0, Extended European Search Report, dated Mar. 13, 2019, 12 pages. |
Huber J and Wollenstein J: “Photoacoustic CO2 sensor system: design and potential for miniaturization and integration in silicon”, Proc. SPIE 9517, Smart Sensors, Actuators and MEMS VII; and Cyber Physical Systems (May 21, 2015), XP055582573, DOI: 10.1117/12.2179157. |
IPEA/409—International Preliminary Report on Patentability dated Apr. 19, 2018 for WO Application No. PCT/US16/055748. |
IPEA/409—International Preliminary Report on Patentability dated Apr. 19, 2018 for WO Application No. PCT/US16/055759. |
IPEA/409—International Preliminary Report on Patentability dated Mar. 22, 2018 for WO Application No. PCT/US16/050456. |
Non-Final Rejection dated Mar. 3, 2017 for U.S. Appl. No. 15/400,554. |
Notice of Allowance and Fees Due dated Apr. 3, 2019 for U.S. Appl. No. 15/767,100. |
Notice of Allowance and Fees Due dated Apr. 18, 2019 for U.S. Appl. No. 15/767,100. |
Notice of Allowance and Fees Due dated Aug. 1, 2019 for U.S. Appl. No. 15/767,100. |
Notice of Allowance and Fees Due dated Feb. 22, 2017 for U.S. Appl. No. 14/879,920. |
Notice of Allowance and Fees Due dated Jul. 9, 2019 for U.S. Appl. No. 15/759,165. |
Notice of Allowance and Fees Due dated Jul. 18, 2017 for U.S. Appl. No. 15/400,554. |
Notice of Allowance and Fees Due dated Oct. 7, 2016 for U.S. Appl. No. 14/879,920. |
Notice of Allowance and Fees Due dated Sep. 11, 2019 for U.S. Appl. No. 15/759,165. |
Outgoing—ISA/210—International Search Report dated Dec. 12, 2016 for WO Application No. PCT/US16/050456. |
Outgoing—ISA/210—International Search Report dated Dec. 23, 2016 for WO Application No. PCT/US16/055748. |
Outgoing—ISA/210—International Search Report dated Jan. 23, 2017 for WO Application No. PCT/US16/055759. |
U.S. Appl. No. 15/759,158, Office Action, dated Jan. 24, 2020, 15 pages. |
Annex to the communication dated Oct. 30, 2020 for EP Application No. 16710887. |
Communication from the Examining Division dated Oct. 30, 2020 for EP Application No. 16710887. |
Kitamura, R., et al, “Optical Constants of Silica Glass From Extreme Ultraviolet to Far Infrared at Near Room Temperature”, Applied Optics, Optical Society of America, Washington, DC, US, vol. 46, No. 33, Nov. 20, 2007, pp. 8118-8133. |
Martini, Paul, et al., “Panic: A Near-infrared Camera for the Magellan Telescopes”, Arxiv.Org, Cornell University Library, NY, Jun. 29, 2004, 8 pages. |
Number | Date | Country | |
---|---|---|---|
20180045563 A1 | Feb 2018 | US |
Number | Date | Country | |
---|---|---|---|
62128745 | Mar 2015 | US |