Depth Mapping With A Head Mounted Display Using Stereo Cameras And Structured Light
A structured light and laser technology, applied in the field of tracking systems, which can solve the problems of impossible separation of features and inability to obtain output.
Active Publication Date: 2018-01-26
CTRL LABS CORP
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Problems solved by technology
Disadvantages of this visual imaging include: the need to adequately illuminate three-dimensional areas
Diffractive designs that require a Gaussian beam as input simply cannot achieve the desired output
The problem is exacerbated in dense light patterns where the source beam needs to be focused onto a tiny spot in order to separate the features, and if the source is an array of lasers, it is impossible to separate the features
Method used
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[0040] figure 1 is a schematic diagram of a structured light emitter (SLE) 100 for 3D tracking using patterned light, according to an embodiment. SLE 100 includes a light generating array (LPA) 110 configured to emit patterned light, such as structured light. In one or more implementations, LPA 110 is a laser array including multiple light sources, such as laser emitters 120 . SLE 100 also includes optical element 140 . In various implementations, the optical element 140 includes a plurality of cells 160 . Each unit 160 is configured as a diffractive element and is aligned with a particular laser emitter 120 such that each unit of the plurality of units 160 modulates light emitted from a corresponding laser emitter 120 . Zoom 180 in cells 160 shows four cells 160 each having a unique diffraction pattern. SLE 100 can generate structured light patterns from LPA 110 . In one or more embodiments, the generated structured light pattern is projected onto a 3D space for tracking...
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A tracking system generates a structured light pattern in a local area. The system includes an array of lasers that generate light. The array of lasers includes a plurality of lasers and an optical element. The plurality of lasers are grouped into at least two subsets of lasers, and each of the at least two subsets of lasers is independently switchable. The optical element includes a plurality ofcells that are each aligned with a respective subset of the array of lasers. Each cell receives light from a corresponding laser of the array of lasers, and each cell individually applies a modulationto the received light passing through the cell to form a corresponding portion of the structured light pattern that is projected onto a local area.
Description
technical field [0001] The present disclosure relates generally to three-dimensional depth rendering using structured light, and more particularly, but not exclusively, to a system for tracking. Background technique [0002] Tracking of a stylus and finger in front of the computer in a three-dimensional field is available and uses various tracking techniques. Tracking techniques may include visual and IR imaging and ultrasound, among other things. The term "tracking" may refer to following the position and motion of an object in three-dimensional space, and includes processing received input at a tracking computer to determine position or motion. For example, in the case of a computer mouse, tracking may include processing mouse input to determine motion. In the case of visually following an object, the term "tracking" may include processing images capturing successive frames of the object. One approach to imaging is to use only cameras to view and process the scene. Cam...
Claims
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IPC IPC(8): H04N13/25H04N13/254H04N13/344G06V10/145
CPCG06F3/0325G01N21/8806G06V40/28G06V10/145G06V2201/12H04N13/254H04N13/271H04N13/344H04N13/25G06F3/0317H01S5/0085H01S5/423H04N2013/0081
Inventor 尼他耶·罗马诺纳达夫·格罗辛格亚伊尔·阿尔珀恩埃米尔·阿隆盖伊·拉茨
Owner CTRL LABS CORP