US 7,321,423 B2
Real-time goniospectrophotometer
Jeffrey L. Guttman, Los Gatos, Calif. (US)
Assigned to Photon, Inc., San Jose, Calif. (US)
Filed on Aug. 09, 2004, as Appl. No. 10/915,204.
Claims priority of provisional application 60/495132, filed on Aug. 15, 2003.
Prior Publication US 2005/0062964 A1, Mar. 24, 2005
Int. Cl. G01J 3/42 (2006.01)
U.S. Cl. 356—319  [356/328] 30 Claims
OG exemplary drawing
 
1. A method of obtaining a goniospectrum, comprising:
parabolically reflecting light from a light source positioned at the focus of a parabolic mirror to provide a beam of light, the beam of light including parallel light corresponding to a range of zenith angles at a particular azimuthal angle from the light source, wherein a position of the parallel light in the beam of light corresponds to one zenith angle of the range of zenith angles;
spectrally dispersing light from the beam; and
capturing the goniospectrum of the light source corresponding to the beam in a form that can be communicated to a user, the goniospectrum including spectra corresponding to the range of zenith angles simultaneously.