Abstract:
A method for obtaining an image of tooth tissue directs incident light toward a tooth (20), wherein the incident light excites a fluorescent emission from the tooth tissue. Fluorescence image data (50) is obtained from the fluorescent emission. Back-scattered reflectance image data (52) is obtained from back-scattered light from the tooth tissue. The fluorescence and back-scattered reflectance image data are combined to form an enhanced image (64) of the tooth tissue for caries detection.
Abstract:
A method for caries detection uses an image capture device (30, 32) to obtain fluorescence image data from the tooth (20) by illuminating the tooth to excite fluorescent emission. A first enhanced image of the tooth is then obtained by illuminating the tooth at a first incident angle, obtaining a back-scattered reflectance image data from the tooth tissue, and combining the back-scattered reflectance image data with the fluorescence image data. A second enhanced image of the tooth is then obtained by illuminating the tooth at a second incident angle, obtaining a back-scattered reflectance image data from the tooth tissue, and combining the back-scattered reflectance image data with the fluorescence image data. The first and second enhanced images are then analyzed to select and display the best-contrast image. This method provides high contrast images for carious regions (58) on all tooth surfaces.
Abstract:
An illumination apparatus including a plurality of light sources in a linear array. An elongated aperture blocks unwanted light and directs light from the light sources in the linear array into an optical integrator for integrating the light to form a uniformized linear illumination of substantially uniform irradiance. At least one lens is provided for imaging the uniformized linear illumination to form a linear illumination beam.
Abstract:
An apparatus for displaying a stereoscopic virtual image to a first viewer (12a) and to a second viewer (12b), where the stereoscopic virtual image is imaged to each viewer at a left viewing pupil (14l) and a right viewing pupil (14r). Configurations using multiple beamsplitters (16) and one or two curved mirrors (24) direct the optical path to first and second viewers (12a and 12b).
Abstract:
A radiation readout apparatus includes: a concave mirror defining a central optical axis; a refractive lens assembly spaced from the concave mirror and symmetrical with the optical axis; an optical assembly which is optically coupled to the refractive lens assembly; a color filter for filtering out leaked stimulating radiation; and a dichroic prism optically coupled to the optical assembly for directing a linear stimulating radiation beam of a first wavelength, which is projected into the dichroic prism from the system, to a stimulable phosphor at the stimulable phosphor location, wherein stimulated radiation of a second wavelength emitted by the stimulable phosphor is passed back through the dichroic prism through the optical assembly, through the refractive lens assembly, reflected from the concave mirror, passed back through the refractive lens assembly, through the optical assembly, through the color filter, and to a linear sensor located at the sensor location.
Abstract:
A reading apparatus obtains a line of image data stored on a surface, the reading apparatus having a radiation source (12) for directing a line of stimulating radiation onto a stimulable image carrier on the surface, generating a line of image-bearing radiation. A sensing head (22) having a plurality of channels (66) obtains image data from the line of image-bearing radiation, each channel (66) sensing a segment (32) of the line of image-bearing radiation. Each channel (66) has inverting optics for inverting the segment (32) of the line of image-bearing radiation to form an inverted line segment image (44) and a sensor (29) for providing image data for the inverted line segment image (44). An image processor (30) accepts image data from sensing head channels (66) and forms a line of image data according to the line of image-bearing radiation.
Abstract:
A projection apparatus (10) forms a tiled image (12) on a display surface (14), the tiled image (14) having at least two adjacent image tile segments. The projection apparatus (10) includes an illumination system (16) for providing a first illumination beam having a first polarization state and a second illumination beam having a second polarization state, these illumination beams being substantially non-overlapping. First and second spatial light modulators (20) form first and second modulated light beams from their respective illumination beams. A beam aligner (40) directs these first and second modulated light beams along adjacent parallel paths, in the direction of the optical axis of a projection lens (18). The projection lens (18) directs the first and second modulated beams to the display surface (14) to form the first and second tile segments respectively.
Abstract:
An illumination apparatus of an optical scanning system having at least one light source arranged along a first line and a cylindrical elliptical reflective surface substantially parallel to the first line for directing light from the at least one light source toward a scanned surface. The cylindrical elliptical reflective surface forms a line of light along the scanned surface.
Abstract:
An imaging apparatus (40) has an optical sensor (14) with sensing elements (18). Each sensing element (18) has an array of sensing components (28). Each sensing component (28) provides a signal corresponding to a pixel for forming an image as an array of pixels. A lens array (76) has a number of lens elements (66). Each lens element (66) directs light to a corresponding sensing element (18) in the optical sensor (14). A prism array (60) has a number of prism elements (62), each prism element (62) directing incident light from the image field toward a corresponding lens element (66) in the lens array (76).
Abstract:
An apparatus for forming an image on a curved diffusive surface (32) comprises an image source (94) for providing image-bearing light along an axis, a relay lens (54) for directing the image-bearing light toward the curved diffusive surface (32), and, a field lens (120) for redirecting off-axis image-bearing light toward the center of curvature of the curved diffusive surface (32).