1
Timothy R Friend, Douglas V Baker, Steven H Peterson: Handheld color measurement instrument. X Rite Incorporated, Warner Norcross & Judd, July 17, 2001: US06262804 (83 worldwide citation)

The specification discloses a handheld color measurement instrument including a housing adapted to be held by a human hand. A plurality of support rollers support the housing for movement in a linear direction. A color measurement engine is contained within the housing and includes an aperture openi ...


2
Bernard J Berg, Douglas V Baker, David R Bowden, Mark A Cargill, Gary T Kalinka: Compact spectrophotometer. X Rite Incorporated, Warner Norcross & Judd, December 14, 1999: US06002488 (77 worldwide citation)

A portable spectrophotometer includes a rotating wheel provided with a plurality of filters having filter characteristics in the 400 to 700 nanometer wavelength range. The filters are moved between an optical conduit and a photoelectric sensor as the wheel is rotated. In one embodiment, a lamp housi ...


3
Mark A Cargill, Bernard J Berg, Steven H Peterson, Timothy R Friend, Thomas J Boes: Automated strip reader densitometer. X Rite Incorporated, Varnum Riddering Schmidt & Howlett, June 2, 1992: US05118183 (64 worldwide citation)

A densitometer apparatus (410) is disclosed and is adapted to provide color density measurements of object samples. The densitometer apparatus (410) comprises a source light (580) for projecting light toward an object sample comprising a control strip (588, 620). A reflection optics assembly (576) i ...


4
Bernard J Berg, Thomas J Boes, Mark A Cargill, Patrick S Rood: Portable spectrophotometer. X Rite Incorporated, Varnum Riddering Schmidt & Howlett, November 29, 1994: US05369481 (63 worldwide citation)

A portable spectrophotometer includes a small-diameter optical sphere as well as optical detectors and signal processing and display circuitry which allows the instrument to be taken to an object to be measured and which provides a readout of color values at the portable instrument. The instrument i ...


5
Bernard J Berg, Thomas J Boes, Mark A Cargill: Multiangular color measuring apparatus. X Rite Incorporated, Varnum Riddering Schmidt & Howlett, February 7, 1995: US05387977 (50 worldwide citation)

A spectrophotometer apparatus (200) is adapted to provide spectral reflectance measurements of an object sample (236) under test, particularly optical characteristics of colored surfaces comprising metallic or pearlescent particles. The apparatus (200) comprises a source light (226) and a reflection ...


6
James L Overbeck, Richard J Van Andel: Optical measurement device and related process. X Rite Incorporated, Warner Norcross & Judd, June 15, 2004: US06750971 (48 worldwide citation)

An instrument and related process for measuring color, shade, gloss, shape and/or translucence of a tooth. First, the instrument uses searchlight illumination to illuminate a tooth with constant irradiance. Second, the instrument uses colorimetric imaging to collect time-separated frames of differen ...


7
Edward M Granger: Scanner calibration and correction techniques using scaled lightness values. X Rite Incorporated, Townsend and Townsend and Crew, December 21, 1999: US06005968 (37 worldwide citation)

A technique for calibrating a scanner wherein once the scanner is calibrated, the scanner's device-dependent tristimulus values (e.g., RGB) for an arbitrary color are transformed to a device-independent representation (e.g., XYZ) of the arbitrary color in a computationally efficient manner. The scan ...


8
Peter G Vander Jagt, Steven H Peterson: Color measurement instrument with modulated illumination. X Rite Incorporated, Warner Norcross & Judd, May 3, 2005: US06888633 (31 worldwide citation)

An instrument and method for measuring light or color using modulated illumination. The system includes an LED illuminator modulated at a specific frequency for illuminating the sample, and a sensor capable of differentiating between the modulated light from the sample and unmodulated ambient light. ...


9
Bernard J Berg, Frederick J Maddage Jr, Richard Maurice Montminy, Kevin Tougas: Benchtop spectrophotometer with improved targeting. X Rite Incorporated, Warner Norcross & Judd, June 24, 2003: US06583879 (31 worldwide citation)

A color measurement instrument with improved sample targeting or positioning. The system includes an integrating sphere, a beam splitter, a video camera, and a spectrograph. The beam splitter is aligned with the viewing port of the spectrophotometer to deliver the light reflected from the sample to ...


10
Steven H Peterson, Timothy R Friend: Apparatus and method for pattern recognition. X Rite Incorporated, Varnum Riddering Schmidt & Howlett, November 5, 1991: US05062714 (28 worldwide citation)

A densitometer apparatus (210) is disclosed and is adapted to provide color density measurements of object samples. The densitometer apparatus (210) comprises a source light (578) for projecting light toward an object sample comprising a control strip (588, 620). A reflection optics assembly (576) i ...