21 results about "Angular aperture" patented technology

The present invention relates to a glazing system comprising a vehicle glazing (100), the glazing having a transmission window (111) in a near-infrared range and a diverging lens (20) having a first surface (21) and a second surface (22), opposite the first surface, the second surface (22) being intended to be oriented towards the outside of the glazing, at least one of said first and second surfaces, the diverging lens (20) having a first surface (21) and a second surface (22) being structured, the structured surface comprising a set of structures, in relief, concentric around said optical axis, and according to a radial section of the structured surface, the set of structures form an alternation of facets (210) and counter-facets (211).The diverging lens (20) is arranged and configured so as to receive said emission beam (70) from the LIDAR on the facets of the structures and all or part of the structures, called reference structures, each have facets at an angle Ak with respect to said plane of the diverging lens, the angle Ak of ​​the facets in absolute value increases with the radial distance, each having a height which varies with distance from the optical axis such that the external vertical angular aperture VFOV2 is greater than the initial vertical angular aperture VFOV1 and the external horizontal angular aperture HFOV2 is greater than the initial horizontal angular aperture HFOV1. Figure for the abbreviation: Fig. 1.

This document relates to a method for detecting an aircraft in the landing phase at an aerodrome, in particular uncontrolled, the aerodrome comprising at least one runway (V1) having at least two ends (E1, E2), and by means of an optronic system comprising at least one primary camera (18, 18a, 18b, 18c, 18d) whose primary angular aperture (Pa, Pb, Pc, Pd) is directed towards a first end (E1) of the runway (V1), the method comprising determining the presence or not, in an end-of-approach region (104) or end-of-departure region, of an object compatible with an aircraft, and where appropriate analyzing the path of the detected object by comparing its current position with a history of the positions of objects detected in an analysis zone (104).

An ultrasonic diagnostic imaging system and method produce attenuation coefficient maps of a region of interest in an ultrasound image. In order to detect the presence of elevation aperture blockage, the system estimates attenuation coefficients by two different methods. The estimates produced by the two different methods are combined to produce a metric, which is evaluated as a function of depth. If the metric satisfies one or more criteria of measurement bias, elevation aperture blockage is identified and an alert of the blockage is produced for the user.

The present invention relates to a glazing system comprising a vehicle glazing unit (100), the glazing unit having a transmission window (111) that transmits in a near-infrared range and a divergent lens (20) having a first surface (21) and a second surface (22) opposite the first surface, the second surface (22) being intended to be oriented outward from the glazing unit, wherein at least one of the first surface and the second surface of the divergent lens (20) is structured, the structured surface comprising a set of raised structures and, in cross section through the structured surface, the set of structures forming alternating facets and counter-facets. The divergent lens (20) is arranged and configured so as to receive the LIDAR emission beam (70) on the facets of the structures and all or some of the structures, referred to as reference structures, have facets each having an angle Ak relative to the plane of the divergent lens, the angle Ak of the facets in absolute value increasing with distance from the optical axis, each reference structure having a height that varies with distance away from the optical axis such that the external vertical angular aperture VFOV2 is greater than the initial vertical angular aperture VFOV1.

The present invention refers in general terms to an illumination device for simulating natural illumination, thus capable of generating at least two light components with different angular distributions having different correlated color temperature or CCT. In particular, the present invention is directed to an illumination device (10,50) for simulating natural illumination com prising: a first optical unit (20) comprising a primary light source (21) comprising a diffusion chamber (14) within which ends at least one emission termination (15 A) of an optical fiber (15) configured to be connected upstream to a natural light source, such as a sunlight collection unit (40), and / or an artificial light source, the primary light source (21) being configured to emit a primary light (22) in the visible spectrum and with a primary light correlated color temperature (CCTp), and a dichroic separating optic (23) configured to intercept at least part of the primary light (22) generated by the primary light source (21) and emit, from a first emitting surface (25), at least one strongly collimated first light component (24a) having a propagation direction (A), generated starting from the primary light (22), and at least one diffuse light component (24b), the at least one first strongly collimated light component (24a) and the at least one diffuse light component (24b) forming a light with chromatic components with different angular distributions (24), wherein the light with chromatic components with different angular distributions (24) has a total flux and a light intensity profile characterized by a first angular aperture (a) less than 40° measured as half-width at half-maximum (HWHM) with reference to at least one semi section plane (X) of the dichroic separating optic (23) containing the propagation direction (A), and wherein, when the primary light correlated color temperature (CCTP) is substantially equal to or higher than 5000 K, the light with chromatic components with different angular distributions (24) has a greater correlated color sum temperature (CCTS) when measured at at least one measurement angle higher than 1.5 times the first angular aperture (a) than when measured at an angle of 0° with respect to the propagation direction (A); and a second optical unit (30) comprising a secondary collimating optic (33) configured to receive as input at least part of the light with chromatic components with different angular distributions (24) emitted from the first emitting surface (25) and emit as output, starting from this light with chromatic components with different angular distributions (24), a weakly collimated light component (34b) and a second strongly collimated light component (34a) forming a collimated light (34) with chromatic components with different angular distributions emitted from the second optical unit (30), wherein the secondary collimating optic (33) is configured to intercept at least the light with chromatic components with different angular distributions (24) emitted from the first emitting surface (25) at angles higher than a cut-off angle (T), measured with respect to the propagation direction (A), wherein the cut-off angle (T) is less than 85°, preferably less than 80°, more pref¬ erably less than 75°; and wherein the collimated light (34) with chromatic components with different angular distributions emitted by the optic secondary collimation (33) has substantially the same luminous flux, integrated over an angular range of angles between 0° and the first angular aperture (a), with respect to a luminous flux of the light with chromatic components with different angular distributions (24) integrated over the same angular range and / or a second angular aperture (a') of the light intensity profile substantially equal to or less than the first angular aperture (a) of the light intensity profile of the light with chromatic components with different angular distributions (24) emitted from the first emitting surface (25).

The invention relates to a glazing system comprising a vehicle glazing unit having a transmission window, the glazing unit (100) being able to receive an emission beam (70) from a lidar (7), the emission beam (70) having a median pointing direction (30) and extending over a given internal vertical angular aperture (FOV1) and the glazing system having a so-called reflective prism arranged and configured to transmit the emission beam by refraction from the input face (25) towards the base (26), and then by reflection off the base (26) towards the output face (28).

The present invention relates to a glazing system comprising a vehicle glazing (100), the glazing having a transmission window (111) transmitting in a near-infrared range and an optical device. According to the invention, the optical device comprises a multiface element (20), connected to the glazing, the multiface element (20) having a textured rear surface having a profile structured by a series of structures (24, 124, 224), and the multiface element (20) is arranged and configured so as to receive the emitted beam (70) on the entry faces (25, 125, 225) of the series of structures (24, 124, 224), each entry face (25, 125, 225) forming a given angle (α, α0, α+, α-) with the vertical axis (Z) so as to angularly deflect the median pointing direction (45) of the emitted beam as it exits the glazing and to increase the vertical angular aperture (FOV2) of the external field of view.

Provided is an optical fiber illumination device in which optical fibers produced without using a special method is used and the amount of light emitted from the side surface is improved. An optical fiber illumination device 1 includes: an optical fiber bundle 10 having a plurality of optical fibers, a resin jacket 101 that covers a bundle of the plurality of optical fibers and emits light, a first end, and a second end, the first end and the second end being polished; and a first light source placed close to the first end so as to emit light in a range of angles larger than an angular aperture of the plurality of optical fibers toward the optical fiber bundle.

The invention relates to a glazing system comprising a vehicle window (100) including an optical device comprising a first prism (41) attached to the inner surface (12) of the window, the first entrance face (43) of the first prism (41) being arranged to receive a near-infrared LIDAR emission beam (70). According to the invention, the optical device includes a second prismatic optical device (42). The first and second prismatic optical devices (42) are adapted to increase the vertical angular aperture of the external field of view (FOV2) of the LIDAR beam external to the vehicle and to ensure that the angle of attack i' of the median direction of the LIDAR beam relative to the horizontal axis upstream of the first entrance face is negative. Figure for the abstract: Figure 1

This document relates to a method for detecting an aircraft in the landing phase on an aerodrome, in particular an uncontrolled aerodrome, the aerodrome comprising at least one runway (V1) having at least two ends (E1, E2), and by means of an optronic system comprising at least one primary camera of which a primary angular aperture is oriented towards a first end (E1) of the runway, the method comprising determining the presence or not, in an approach region, of an object compatible with an aircraft, and where appropriate analyzing the path of the detected object by comparing its current position with a history of the positions of objects detected in an analysis zone. Abstract figure: Figure 14

The beam expander includes first and second optical elements spaced apart from each other, and a light diffuser having an angular aperture through which incident light is diffused, wherein the first optical element in-couples the diffused light such that light exiting the first optical element has a first cross-sectional shape, and light having a second cross-sectional shape different from the first cross-sectional shape is incident on the second optical element, and the second optical element out-couples the light incident from the first optical element.

This document relates to an optronic system for air traffic surveillance, in particular for an uncontrolled aerodrome, comprising a mast with a longitudinal axis and at least one secondary camera having a secondary angular aperture and at least two static primary cameras having a primary angular aperture that is greater than the secondary angular aperture of the secondary camera, said at least two primary cameras being arranged around the longitudinal axis and supported by the mast and said secondary camera being movably mounted on the mast about the longitudinal axis, the system further comprising means for rotating the secondary camera about the longitudinal axis, means for recognizing and tracking an aircraft within a static primary angular aperture, and means for controlling the means for moving the secondary camera. Abstract figure: Figure 2

The present document relates to an optronic system (10) for monitoring air traffic, comprising a mast (14) of longitudinal axis (L) and at least one secondary camera (16) having a secondary angular aperture (17) and at least two static primary cameras (18, 18a, 18b, 18c, 18d) having a primary angular aperture (Pa, Pb, Pc, Pd) which is greater than the secondary angular aperture (17) of the secondary camera (16), said at least two primary cameras (18, 18a, 18b, 18c, 18d) being arranged around the longitudinal axis (L) and borne by the mast (14) and said secondary camera (17) being movably mounted on the mast (14), the system (10) further comprising means (40) for rotating the secondary camera (17), means (43) for recognizing and tracking an aircraft, and means (42) for controlling the movement means (40) for moving the secondary camera (16).

The present invention relates to a glazing system comprising a vehicle glazing (100), the glazing having a transmission window (111) in a near-infrared range and an optical device. According to the invention, the optical device comprises a multifaceted element (20), attached to the glazing, the multifaceted element (20) having a textured rear surface with a profile structured by a series of structures (24, 124, 224), and the multifaceted element (20) is arranged and configured to receive the emission beam (70) on the entrance faces (25, 125, 225) of the series of structures (24, 124, 224), each entrance face (25, 125, 225) forming a given angle (α, α0, α+, α-) with the vertical axis (Z) so as to angularly deflect the median direction of the beam exiting the glazing and to increase the vertical angular aperture (FOV2) of the external field of view. Figure for the abstract: Figure 1

The present invention refers in general terms to an illumination device for simulating natural illumination, thus capable of generating at least two light components with different angular distributions having different correlated color temperature or CCT. In particular, the present invention is directed to an illumination device (10,50) for simulating natural illumination com prising: a first optical unit (20) comprising a primary light source (21) comprising a diffusion chamber (14) within which ends at least one emission termination (15 A) of an optical fiber (15) configured to be connected upstream to a natural light source, such as a sunlight collection unit (40), and / or an artificial light source, the primary light source (21) being configured to emit a primary light (22) in the visible spectrum and with a primary light correlated color temperature (CCTp), and a dichroic separating optic (23) configured to intercept at least part of the primary light (22) generated by the primary light source (21) and emit, from a first emitting surface (25), at least one strongly collimated first light component (24a) having a propagation direction (A), generated starting from the primary light (22), and at least one diffuse light component (24b), the at least one first strongly collimated light component (24a) and the at least one diffuse light component (24b) forming a light with chromatic components with different angular distributions (24), wherein the light with chromatic components with different angular distributions (24) has a total flux and a light intensity profile characterized by a first angular aperture (a) less than 40° measured as half-width at half-maximum (HWHM) with reference to at least one semi section plane (X) of the dichroic separating optic (23) containing the propagation direction (A), and wherein, when the primary light correlated color temperature (CCTP) is substantially equal to or higher than 5000 K, the light with chromatic components with different angular distributions (24) has a greater correlated color sum temperature (CCTS) when measured at at least one measurement angle higher than 1.5 times the first angular aperture (a) than when measured at an angle of 0° with respect to the propagation direction (A); and a second optical unit (30) comprising a secondary collimating optic (33) configured to receive as input at least part of the light with chromatic components with different angular distributions (24) emitted from the first emitting surface (25) and emit as output, starting from this light with chromatic components with different angular distributions (24), a weakly collimated light component (34b) and a second strongly collimated light component (34a) forming a collimated light (34) with chromatic components with different angular distributions emitted from the second optical unit (30), wherein the secondary collimating optic (33) is configured to intercept at least the light with chromatic components with different angular distributions (24) emitted from the first emitting surface (25) at angles higher than a cut-off angle (T), measured with respect to the propagation direction (A), wherein the cut-off angle (T) is less than 85°, preferably less than 80°, more pref¬ erably less than 75°; and wherein the collimated light (34) with chromatic components with different angular distributions emitted by the optic secondary collimation (33) has substantially the same luminous flux, integrated over an angular range of angles between 0° and the first angular aperture (a), with respect to a luminous flux of the light with chromatic components with different angular distributions (24) integrated over the same angular range and / or a second angular aperture (a') of the light intensity profile substantially equal to or less than the first angular aperture (a) of the light intensity profile of the light with chromatic components with different angular distributions (24) emitted from the first emitting surface (25).

The invention relates to a window glass system comprising a vehicle window glass unit having a transmissive window, which window glass unit (100) is capable of receiving a transmitted light beam (70) from a laser radar (7), which transmitted light beam (70) has an intermediate pointing direction (30) and extends over a given internal vertical angular aperture (FOV1), and which window glass system has a so-called reflective prism, which is arranged and configured to transmit the transmitted light beam by refracting from an input face (25) towards a base (26) and then by reflecting off the base (26) towards an output face (28).

The present invention provides a method for inspecting an object placed in a turbid fluid, the method comprising the steps of: A) generating electromagnetic radiation by a radiation source; B) emitting the electromagnetic radiation; C) modulating the amplitude or frequency of the electromagnetic radiation; D) illuminating a surface of the object at a plurality of object points with the modulated electromagnetic radiation, the illumination of the object surface occurring along an illumination beam axis; and E) focusing the electromagnetic radiation reflected from the object points toward a light receiving portion of a detector by an optical system having a focal length, the detector having an aperture having an aperture shape in an aperture plane, the aperture plane being separated from the light receiving portion by a detector distance and the aperture plane being separated from the optical system by an aperture distance, the focusing occurring along the detection beam axis. and F) detecting electromagnetic radiation reflected from the surface of the object with the receiver; and for each of the plurality of object points, G) measuring an indication of a propagation time of the electromagnetic radiation from a reference point in a beam path of the electromagnetic radiation to each object point; and H) outputting the indication of the propagation time, wherein the illumination beam axis and the detection beam axis form a parallax angle, the aperture has an aperture position in a direction perpendicular to at least the illumination beam axis or the aperture beam axis, and the surface of the object is spaced a measurement distance from the receiver.

The present invention relates to a glazing system comprising a vehicle glazing (100), the glazing having a transmission window (111) in a near-infrared range and a converging lens (20) having a first surface (21) and a second surface (22), opposite the first surface, the second surface (22) being intended to be oriented towards the outside of the glazing, at least one of said first and second surfaces, the converging lens (20) having a first surface (21) and a second surface (22) being structured, the structured surface comprising a set of structures, in relief, concentric around said optical axis, and according to a radial section of the structured surface, the set of structures form an alternation of facets (210) and counter-facets (211).The converging lens (20) is arranged and configured so as to receive said emission beam (70) from the LIDAR on the facets of the structures and all or part of the structures, called reference structures, each have facets at an angle Ak with respect to said plane of the converging lens, the angle Ak of ​​the facets in absolute value increases with the radial distance, each having a height which varies with distance from the optical axis such that the external vertical angular aperture VFOV2 is greater than the initial vertical angular aperture VFOV1 and the external horizontal angular aperture HFOV2 is greater than the initial horizontal angular aperture HFOV1. Figure for the abbreviation: Fig. 1.

The present invention relates to a glazing system comprising a vehicle glazing unit (100), the glazing unit having a transmission window (111) that transmits in a near-infrared range and a convergent lens (20) having a first surface (21) and a second surface (22) opposite the first surface, the second surface (22) being intended to be oriented outward from the glazing unit, wherein at least one of the first surface and the second surface of the convergent lens (20) is structured, the structured surface comprising a set of raised structures and, in cross section through the structured surface, the set of structures forming alternating facets and counter-facets. The convergent lens (20) is arranged and configured so as to receive the LIDAR emission beam (70) on the facets of the structures and all or some of the structures, referred to as reference structures, have facets each having an angle Ak relative to the plane of the convergent lens, the angle Ak of the facets in absolute value increasing with distance from the optical axis, each reference structure having a height that varies with distance away from the optical axis such that the external vertical angular aperture VFOV2 is greater than the initial vertical angular aperture VFOV1.

This document relates to a method for detecting an aircraft during its landing phase at an aerodrome, particularly an uncontrolled one, the aerodrome comprising at least one runway (V1) having at least two ends (E1, E2), and by means of an optronic system comprising at least one primary camera whose primary angular aperture is directed towards a first end (E1) of the runway. The method comprises determining the presence or absence, in an approach area, of an object compatible with an aircraft, and, if so, analyzing the trajectory of the detected object by comparing its current position with a history of the positions of objects detected in an analysis area. Abstract figure: Figure 14

The invention relates to a glazing system comprising vehicle glazing (1000) comprising an optical device comprising a first prism (41) attached to the interior surface (12) of the glazing, the first entrance face (43) of the first prism (41) being arranged to receive a near-infrared LiDAR emitted beam (70). According to the invention, the optical device comprises a second prismatic optical device (42), the first and second prismatic optical devices (42) being suitable for increasing the vertical angular aperture of the external field of view (FOV2) of the LiDAR beam outside the vehicle and for obtaining a negative angle of attack i' of the median pointing direction of the LiDAR beam relative to the horizontal axis upstream of the first entrance face.