Abstract:
A dual-image projection apparatus includes a light source (4) and a spatial light modulator (1) including a first modulation module (11) and a second modulation module (12). Additionally, the apparatus includes a Fourier lens (2) and the spatial light modulator (1) is positioned at a front focal plane of the Fourier lens (2). The first modulation module (11) modulates light from the light source (4) through the Fourier lens (2) to reproduce a first 2D holographic image and the second modulation module (12) modulates the light through the Fourier lens (2) to reproduce a plurality of second 2D holographic images. The apparatus further includes a first light-diffusing film (31) to display the first 2D holographic image to produce a first virtual image and a plurality of second light-diffusing films (32) to respectively display the plurality of second 2D holographic images sequentially in a rate to produce a 3D virtual image.
Abstract:
The present invention relates to an assembly including a body for carrying two optical arrangements, the body having a flat shape with a first side and a second side opposite to the first side; the two optical arrangements namely a first optical arrangement and a second optical arrangement, each of the two optical arrangements having a field of view of at least a half sphere and comprising a head lens and a sensor; wherein the first optical arrangement is mounted on the body with its head lens on the first side of the body viewing at least a half sphere on the first side of the body and the second optical arrangement is mounted on the body with its head lens on the second side of the body viewing at least a half sphere on the second side of the body; and the inte-nodal distance between the respective two optical arrangements is not smaller than a minimum distance at which 180 degree fields of view of the optical arrangements do not view the body.
Abstract:
A an augmented reality (AR) headset includes a depth camera assembly that combines stereo imaging with structured light (SL) to generate depth information for an area of interest. The depth camera assembly includes at least two image capture devices and a SL illuminator and determines an imaging mode based on a signal to noise ratio or spatial variance of images captured by one or more of the cameras. Different imaging modes correspond to different operation of one or more image capture devices and the SL illuminator. The depth camera assembly includes different ranges of signal to noise ratios that each correspond to an imaging mode, and the depth camera assembly configures the image capture devices and the SL illuminator based on an imaging mode associated with a range of signal to noise ratios including the signal to noise ratio of a captured image.