1
Perry A Palumbo: Spatial frequency optical measurement instrument and method. Hach Company, Ference & Associates, June 26, 2012: US08208144 (2 worldwide citation)

A spatial frequency optical measurement instrument (100) is provided according to the invention. The instrument (100) includes a spatial frequency mask (120) positioned in a light path and configured to encode light with spatial frequency information, a light receiver (140) positioned to receive the ...


2
Perry Palumbo: Spatial frequency optical measurement instrument and method. Hach Company, Ference & Associates, August 13, 2013: US08508737

A spatial frequency optical measurement instrument is provided according to the invention. The instrument includes a spatial frequency mask positioned in a light path and configured to encode light with spatial frequency information, a light receiver positioned to receive the light encoded with the ...


3
Perry A Palumbo: Spatial frequency optical measurement instrument and method. Hach Company, The Ollila Law Group, July 29, 2010: US20100188660-A1

A spatial frequency optical measurement instrument (100) is provided according to the invention. The instrument (100) includes a spatial frequency mask (120) positioned in a light path and configured to encode light with spatial frequency information, a light receiver (140) positioned to receive the ...


4
Palumbo Perry A: Spatial frequency optical measurement instrument and method. Hach Company, Palumbo Perry A, JANSEN Gregg L, January 22, 2009: WO/2009/012255

A spatial frequency optical measurement instrument (100) is provided according to the invention. The instrument (100) includes a spatial frequency mask (120) positioned in a light path and configured to encode light with spatial frequency information, a light receiver (140) positioned to receive the ...


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Palumbo Perry A: Spatial frequency optical measurement instrument and method. Hach Co, Liu Jinfeng, Li Jialin, June 16, 2010: CN200880024865

A spatial frequency optical measurement instrument (100) is provided according to the invention. The instrument (100) includes a spatial frequency mask (120) positioned in a light path and configured to encode light with spatial frequency information, a light receiver (140) positioned to receive the ...


7
Perry Palumbo: Spatial frequency optical measurement instrument and method. Hach Company, October 18, 2012: US20120262717-A1

A spatial frequency optical measurement instrument is provided according to the invention. The instrument includes a spatial frequency mask positioned in a light path and configured to encode light with spatial frequency information, a light receiver positioned to receive the light encoded with the ...