Abstract: A structured light projector is disclosed, which includes a first light source, a second light source, an optical refractive element and an optical shaper. The first light source and the second light source are configured to respectively emit first incoherent light and second incoherent light. The optical refractive element is arranged over the first and second light sources for refracting the first incoherent light and the second incoherent light. The optical shaper element is arranged over the optical refractive element for shaping the first incoherent light to generate first structured light with plural first optical patterns and shaping the second incoherent light to generate second structured light with plural second optical patterns, in which the first structured light and the second structured light are overlapped onto a region of space.

Abstract: A liquid crystal element includes a substrate, a diffractive optical element layer, and a liquid crystal material. The diffractive optical element layer has an uneven surface. The liquid crystal material is between the substrate and the uneven surface of the diffractive optical element layer. The liquid crystal material is disposed contiguously with the uneven surface of the diffractive optical element layer.

Abstract: A line pattern projector includes a light source array, a lens and a diffractive microlens array. The light source array includes a plurality of light sources that emit light beams, wherein the plurality of light sources are arranged along a first direction. The lens is configured to collimate the light beams. The diffractive microlens array (MLA) is configured to diffract the collimated light beams thereby to project an illumination pattern, wherein a lens pitch of the diffractive MLA with respect to the first direction is wider than a lens pitch of the diffractive MLA with respect to a second direction. The illumination pattern is formed by overlapping multiple dot patterns that are projected by the light sources; and the illumination pattern includes a plurality of line light patterns in the first direction.

Abstract: A dot pattern projector includes a light source array, a lens and a diffracting unit. The light source array includes a plurality of light sources that emit light beams. The lens is configured to collimate the light beams. The diffracting unit is configured to diffract the collimated light beams thereby to project an illumination pattern, wherein the illumination pattern is formed by overlapping multiple dot patterns that are projected by different light sources or interlacing multiple dot patterns that are projected by different light sources.

Abstract: A light projection apparatus is disclosed, which includes a laser source, an adjustable optical element and a diffractive optical element. The laser source is configured to emit light. The adjustable optical element is arranged over the light source for refracting the light. The adjustable optical element is position adjustable or effective focal length adjustable. The diffractive optical element is arranged over the adjustable optical element for diffracting the light onto a region of space.

Abstract: A structured light projector including a light source, an irradiation range controlling device, and a diffractive optical element is provided. The irradiation range controlling device is disposed on a transmission path of a light beam from the light source. The diffractive optical element is disposed on a transmission path of the light beam from the irradiation range controlling device. The irradiation range controlling device is adapted to control an irradiation range of the light beam transmitted to the diffractive optical element so as to change a size of a region of the diffractive optical element illuminated by the light beam from the irradiation range controlling device. A three-dimensional image sensing module using the same is also provided.

Abstract: A depth decoding system and a method for rectifying a ground-truth image are introduced. The depth decoder system includes a projector, a camera, a processor and a decoder. The projector is configured to project a structural light pattern to a first reference plane and a second reference plane. The camera is configured to capture a first ground-truth image from the first reference plane and capture a second ground-truth image from the second reference plane. The processor is configured to perform a rectification operation to the first ground-truth image and the second ground-truth image to generate a rectified ground-truth image. The decoder is configured to generate a depth result according to the rectified ground-truth image.

Abstract: A liquid crystal element includes a substrate, a diffractive optical element layer, and a liquid crystal material. The diffractive optical element layer has an uneven surface. The liquid crystal material is between the substrate and the uneven surface of the diffractive optical element layer. The liquid crystal material is disposed contiguously with the uneven surface of the diffractive optical element layer.

Abstract: A structured-light projector includes a light source that emits an emitted light with a predetermined pattern; and a diffractive optical element (DOE) that directly receives the emitted light and generates a plurality of light tiles, which are randomly or regularly disposed.

Abstract: A depth decoding system and a method for rectifying a ground-truth image are introduced. The depth decoder system includes a projector, a camera, a processor and a decoder. The projector is configured to project a structural light pattern to a first reference plane and a second reference plane. The camera is configured to capture a first ground-truth image from the first reference plane and capture a second ground-truth image from the second reference plane. The processor is configured to perform a rectification operation to the first ground-truth image and the second ground-truth image to generate a rectified ground-truth image. The decoder is configured to generate a depth result according to the rectified ground-truth image.

Abstract: A light projection calibration device includes a light emission element and an optical element. The light emission element is used to emit light and includes a plurality of light emission points. The plurality of light emission points are used to emit the light and orderly arranged to form a predetermined pattern. The optical element is disposed according to position of the light emission element and used to diffract the light to generate diffracted light. The diffracted light is projected to a far field plane to generate a plurality of fan-out points on the far field plane. The fan-out points are analyzed to obtain a light intensity waveform used to determine whether the light emission element and the optical element are aligned to an acceptable level.

Abstract: A structured light projector including a light source, an irradiation range controlling device, and a diffractive optical element is provided. The irradiation range controlling device is disposed on a transmission path of a light beam from the light source. The diffractive optical element is disposed on a transmission path of the light beam from the irradiation range controlling device. The irradiation range controlling device is adapted to control an irradiation range of the light beam transmitted to the diffractive optical element so as to change a size of a region of the diffractive optical element illuminated by the light beam from the irradiation range controlling device. A three-dimensional image sensing module using the same is also provided.

Abstract: A structured-light projector includes a diffractive optical element (DOE) that receives a collimated light and generates a plurality of light tiles. The DOE includes a plurality of optical components disposed on a substrate, wherein the optical components of the DOE are randomly arranged on the substrate.

Abstract: A structured-light projector includes a diffractive optical element (DOE) that receives a collimated light and generates a plurality of light tiles. The DOE includes a plurality of optical components disposed on a substrate, wherein the optical components of the DOE are randomly arranged on the substrate.

Abstract: A structured-light projector includes a light source that emits an emitted light with a predetermined pattern; and a diffractive optical element (DOE) that directly receives the emitted light and generates a plurality of light tiles, which are randomly or regularly disposed.