Abstract: An optical system configured such that the relation between the incident angle and the emergence distance of the emergent optical beam relative to the main optical axis is proportionally decreasing so as to mix the colours in a homogeneous manner, and an emergent surface textured so as to make uniform the homogenisation of the additive synthesis. The image of the light source is uniformly homogeneous and decorrelated from the shape of same.

Abstract: An optical system 100 configured such that the relation between the incident angle and the emergence distance of the emergent optical beam relative to the main optical axis O-O is proportionally decreasing so as to mix the colours in a homogeneous manner, and an emergent surface textured so as to make uniform the homogenisation of the additive synthesis. The image of the light source 901 is uniformly homogeneous and decorrelated from the shape of same.

Abstract: A collimator having an overall bowl shape. The collimator is rotationally symmetrical about an optical axis of the collimator, and has an output wall, an input recess opposite the output wall, the input recess being defined by an internal side wall and an internal upper wall which interrupts the internal side wall in such a way as to define an intersection region, the internal side wall and the internal upper wall being designed to allow an incident light ray to enter the collimator peripherally and centrally, respectively, and a peripheral reflective wall joining the output wall to the internal side wall, the surface of the internal side wall being designed in such a way that a straight line, which is tangential to the internal side wall and joins the intersection region, passes through the focal point of the collimator.

Abstract: The optical system (1) is intended to measure the bidirectional reflectance and/or transmittance distribution function BRDF, BTDF and BSDF of a surface (10) of at least a portion of an object (7), the system comprising successively: an aplanatic lens (2) having an opening angle, the absolute value of which is comprised between 45° and a value strictly lower than 90°, a converging field lens (3) downstream of the plane P, an image pickup lens (4), the field angle of which is higher than or equal to the convergence angle of the scattered light beams emerging from the field lens, and a video sensor (5), the aplanatic lens (2), the converging field lens (3), the image pickup lens (4) and the video sensor (5) being arranged so as to allow a conjugation C1 between the surface (10) and the entrance pupil of the image pickup lens (4) and a conjugation C2 between an intensity pattern and the video sensor (5).

Abstract: A collimator having an overall bowl shape. The collimator is rotationally symmetrical about an optical axis of the collimator, and has an output wall, an input recess opposite the output wall, the input recess being defined by an internal side wall and an internal upper wall which interrupts the internal side wall in such a way as to define an intersection region, the internal side wall and the internal upper wall being designed to allow an incident light ray to enter the collimator peripherally and centrally, respectively, and a peripheral reflective wall joining the output wall to the internal side wall, the surface of the internal side wall being designed in such a way that a straight line, which is tangential to the internal side wall and joins the intersection region, passes through the focal point of the collimator.

Abstract: A lighting device includes a light source and an optical element, the light source includes a plurality of light emitting diodes aligned. The optical element being shaped to focus a light beam emitted by the light source in a plane orthogonal to the line of light emitting diodes and to deflect said light beam parallel to an illuminating plane including the line of light emitting diodes so as to form a light beam having an ellipsoidal section.

Abstract: The optical system (1) is intended to measure the bidirectional reflectance and/or transmittance distribution function BRDF, BTDF and BSDF of a surface (10) of at least a portion of an object (7), the system comprising successively: an aplanatic lens (2) having an opening angle, the absolute value of which is comprised between 45° and a value strictly lower than 90°, a converging field lens (3) downstream of the plane P, an image pickup lens (4), the field angle of which is higher than or equal to the convergence angle of the scattered light beams emerging from the field lens, and a video sensor (5), the aplanatic lens (2), the converging field lens (3), the image pickup lens (4) and the video sensor (5) being arranged so as to allow a conjugation C1 between the surface (10) and the entrance pupil of the image pickup lens (4) and a conjugation C2 between an intensity pattern and the video sensor (5).

Abstract: A lighting device includes a light source and an optical element, the light source includes a plurality of light emitting diodes aligned. The optical element being shaped to focus a light beam emitted by the light source in a plane orthogonal to the line of light emitting diodes and to deflect said light beam parallel to an illuminating plane including the line of light emitting diodes so as to form a light beam having an ellipsoidal section.