Optics: measuring and testing – Of light reflection
Reexamination Certificate
2007-11-20
2007-11-20
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
Of light reflection
C356S446000
Reexamination Certificate
active
10511686
ABSTRACT:
A method and apparatus for measuring light reflections of an object, comprising a light-source illumination-observation assembly, the assembly comprising: (A) an illumination unit comprising an illumination light source and illumination aperture stop being arranged to provide a confined luminous field, an illumination field stop (307) adapted to provide an illumination beam (305) of light from said confined luminous field, an collimating optical element (309) adapted to collimate said illumination beam and to provide an illumination field (313) on an object; (B) an observation unit comprising: at least one observation field stop adapted to provide an observation beam (306) comprising a ray boundary, at least one focusing optical element (309) adapted to focus said observation beam, an observation light receiver; and (C) at least one common optical element (309) arranged so that said illumination beam and said observation beam form an overlap therein; and (D) a unit separation stop (310) adapted to stop light from said illumination unit in reaching said observation light receiver of said observation unit; wherein said at least one observation field stops (308, 310, 311) comprises at least one limiting field stop (310) adapted to limit said ray boundary of said observation beam and to maintain said overlap of said illumination beam and said observation beam; a diffuser light-source assembly; and use thereof.
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Fundamentals of Optics, Fourth Edition, Jenkins and White, McGraw-Hill, 1976, Chapter 7, p. 115.
Delta: “On site quality control of road markings & road surfaces in accordance with cEN specifications”.
Hansen Jan Harries
Nielsen Hans Ole
Offersgaard Jesper Falden
Sørensen Kai Ove
Day Pitney LLP
Delta Dansk Elektronik, Lys & Akustik
Skovholt Jonathan
Toatley , Jr. Gregory J.
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