title: Standardized speckle measurement method matched to human speckle perception in laser projection systems.
abstract: We present a standardized procedure to measure the amount of speckle in laser based projection systems. The parameters of the measurement procedure are chosen such that the measured speckle contrast values are in correspondence with the subjective speckle perception of a human observer, independent of the particularities of the laser projector's illumination configuration. The resulting measurement configuration consists of a single digital image sensor in combination with a camera lens of which the settings are related to the human eye. In addition, a standardized measurement procedure and speckle pattern analysis method are suggested. Finally, the speckle measurement set-up is applied to a laser projection system and corresponding subjective speckle perception results of a large test public are discussed.
authors.affiliation: Brussels Photonics Team B-PHOT, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium. stijn.roelandt@b-phot.org
authors.forename: Stijn
authors.initials: S
authors.lastname: Roelandt
authors.forename: Youri
authors.initials: Y
authors.lastname: Meuret
authors.forename: Gordon
authors.initials: G
authors.lastname: Craggs
authors.forename: Guy
authors.initials: G
authors.lastname: Verschaffelt
authors.forename: Peter
authors.initials: P
authors.lastname: Janssens
authors.forename: Hugo
authors.initials: H
authors.lastname: Thienpont
mesh_terms: D015350:Contrast Sensitivity / Q000502:physiology; D006801:Humans; D007834:Lasers; D055620:Optical Phenomena; D010364:Pattern Recognition, Visual / Q000502:physiology; D010775:Photic Stimulation; D012542:Scattering, Radiation; D014796:Visual Perception / Q000502:physiology*