A laser system for generation of three-dimensional (3D) colored images is based on semiconductor laser sources generating laser light at a plurality of wavelengths. The laser source for each basic color range (red, green and blue) is formed on a single chip. The chip can be an array of the distributed feedback lasers or an array of distributed Bragg reflector lasers, each of which generates laser light at its own wavelength, or a COMB laser generating laser light at a plurality of wavelengths.

All light illuminates a two-dimensional (2D) display, and the light transmitted through the display or reflected by the display at a given color range impinges on an optical unit, containing a first optical element, e.g., a lens or a mirror, the focal length of which is wavelength-sensitive. Light at different wavelengths forms 2D images at different depths. Then, once the images created by the display and the laser pulses at each wavelength are synchronized, all images of the given colored range are perceived by the human's eyes as a single 3D image of this color range.

To fuse 3D images in red, green and blue that are formed at different positions, an optical element, e. g., a lens or a mirror is employed, the focal length of which is adjustable by mechanical motion, or deformation, or applying an electro-optic effect in an electric field. This optical element can be either the same first element with the wavelength-dependent focal length, or a different element. Then, once the light is switched between red, green and blue color ranges, the adjustable focal length of this element is adjusted such to compensate a change of the focal length of the first element, and the focal length of the entire optical unit is restored. Then the human's eyes average the perceived light and see a smoothly moving fully colored 3D image.

The 1-2nd lens group is divided into three lens groups which move when focusing is performed during the magnification change. Even in a case in which the second optical group is formed of one mirror, it is possible for a primary image to contain appropriate aberration and to hereby reduce aberration of an image which is finally projected onto a screen through the second optical group.

According to one example for outputting image data, an image comprising a surface and an object are captured on a sensor. An object mask based on the captured image is created on a processor. A first composite image based on the object mask and a source content file is created. In an example, the first composite image is projected to the surface.

The present invention provides a radiography device for producing an X-ray image of a tooth or a structure supporting the tooth. The radiography device of the present invention includes: an X-ray source for generating X-rays; a projection unit for projecting a user control mode image to the outside as user control information for controlling the X-ray source; and a control unit including an operation unit for user operation, and controlling the X-ray source according to the user control information selected through the operation unit.

An arrangement for providing visual effects including light emitting members attached to a target, an imaging unit for locating the light emitting members, a computing unit for receiving real-time location information data from the imaging unit and controlling a laser projector based on the received location information data, a laser projector projecting a laser beam responsive to control information provided by the computing unit, and a partially reflecting mirror reflecting the projected laser beam with respect to the light emitting members towards and/or in the vicinity of the light emitting members and passing the light from the light emitting members to the imaging unit. Related method is presented.

An arrangement for providing visual effects including light emitting members attached to a target, an imaging unit for locating the light emitting members, a computing unit for receiving real-time location information data from the imaging unit and controlling a laser projector based on the received location information data, a laser projector projecting a laser beam responsive to control information provided by the computing unit, and a partially reflecting mirror reflecting the projected laser beam with respect to the light emitting members towards and/or in the vicinity of the light emitting members and passing the light from the light emitting members to the imaging unit. Related method is presented.

Provided is a projection device that comprises a projection optical system for projecting periodic pattern light onto an object, the projection device having an aperture stop that is placed on a pupil plane of the projection optical system, wherein conditional expressions L.sub.1/L.sub.2>S.sub.1/S.sub.2 and L.sub.1>S.sub.1 are satisfied, where L.sub.1 represents a dimension of the periodic pattern light in a periodic direction and L.sub.2 represents a dimension in a direction vertical to the periodic direction, for an image intensity distribution of a light source, which is formed in the pupil plane by light emitted from the light source, and S.sub.1 represents a dimension in the periodic direction of the periodic pattern light and S.sub.2 represents a dimension in the direction vertical to the periodic direction, for an opening of the aperture stop.

Shape measurement of a specular object even in the presence of multiple intra-object reflections such as those at concave regions of the object. Silhouettes of the object are extracted, by positioning the object between a camera and a background. A visual hull of the object is reconstructed based on the extracted silhouettes, such as by image capture of shadows of the object projected onto a screen, and image capture of reflections by the surface of the object of coded patterns onto the screen. The visual hull is used to distinguish between direct (single) reflections of the coded patterns at the surface of the object and multiple reflections. Only the direct (single) reflections are used to triangulate camera rays and light rays onto the surface of the object, with multiple reflections being excluded. The 3D surface shape may be derived by voxel carving of the visual hull, in which voxels along the light path of direct reflections are eliminated. For surface reconstruction of heterogeneous objects, which exhibit both diffuse and specular reflectivity, variations in the polarization state of polarized light may be used to separate between a diffuse component of reflection and a specular component.

A moving head projector. The moving head projector includes a projector housing that is rotatably mounted to a yoke, which is in turn rotatably mounted to a base. The yoke includes a motor configured to selectively move the projector housing along multiple axes. A projector is located within the projector housing and directed towards an opening on a front side of the projector housing, wherein a lens is also positioned over the opening. A computer within the base is configured to control the moving head projector. The computer further includes non-transitory memory configured for operating more than one operating system. In one embodiment, the moving head projector system includes a dual boot computer.

A projection system including a first projector and a second projector project images side by side, wherein the first projector includes a first projection section that projects a first image and a first control section that causes the first projection section to project an identification image containing identification information, and the second projector includes a second projection section that projects a second image, an imaging section that captures an image of a range including the projection range of the second projection section to produce a captured image, and a second control section that causes the imaging section to capture an image of the identification image projected by the first projector, acquires the identification information on the first projector based on the captured identification image, and determines the position of the first image relative to the second image based on the position of the identification image in the captured image.