Abstract: A system is set forth for detection of catheter location for intravenous access, comprising a catheter having a light source for illuminating a needle tip thereof; and an infrared detector and image projector for simultaneously detecting image vasculature and the location of the needle tip below the surface of the skin and in response projecting an image onto the skin to reveal the location of the needle tip relative to the vasculature.

Abstract: An imaging system is provided. The imaging system comprises an image source providing a video data stream. The imaging system further comprises a plurality of microtile units for: generating respective portions of an image from the video data stream, each microtile unit connectable to a plurality of other microtile units in multiple geometrical configurations. Each microtile unit comprises circuitry for: communication with the plurality of other microtile units to control generation of each respective portion of the image; and sub-image capture from the video data stream.

Abstract: A method for use in an imaging system having an image source and a plurality of microtile units for generating respective portions of the image is provided, each microtile unit including a self-contained screen and a rear projector for projecting the image on the screen, the method for at least one of self-aligning, colour matching and brightness matching the image portions across successive adjacent microtile units. The screen is over-scanned so that a portion of an edge of each image spills over onto a side wall of the microtile unit adjacent a further one of microtile units. Light from the image is permitted to spill through the side wall into the further microtile unit. The light is detected within the further microtile unit. The image is adjusted in response to detection of the light within the further microtile unit so as to at least one of align, color match and brightness match the image between the plurality of microtile units.

Abstract: A safety interlock system for a projector system is provided. The projector system has a lamp, a controller and ballast for powering the lamp upon receipt of a lamp enable signal from the controller. The projector system further has a safety inter-lock system for deactivating the lamp in the event the lamp is not properly installed.

Abstract: A projector incorporating a prism and a plurality of light valves for modulating light that passes though the prism, wherein the color splitting-converging prism includes a dichroic coating having multiple layers of high and low index of refraction and ¼ wavelength thickness at each desired angle of incidence for reducing dichroic shift and thereby minimizing light loss.

Abstract: According to embodiments described in the specification, a method, and apparatus for scaling an image to produce a scaled image is described, the image comprising an array of image pixels, and the scaled image comprising an array of scaled pixels. In a first step a map is created between the array of scaled pixels and the array of image pixels. In a second step, an energy parameter of each image pixel in the array of image pixels is determined. In a third step, a fraction of a given image pixel which overlaps a given scaled pixel in the array of scaled pixels is determined for each image pixel, in the array of image pixels. In a final step the energy parameter of the given image pixel is distributed between scaled pixels which overlap the given image pixel, the distributing based on the fraction, such that the energy parameter is conserved.

Abstract: According to embodiments described in the specification, a reflective iris is described for concentrating collimated light emitted from a parabolic lamp, the parabolic lamp comprising a lamp aperture from which the collimated light is emitted. The reflective iris is comprised of a planar reflective element for reflecting the collimated light back towards the parabolic lamp, a shape of the planar reflective element being generally complementary to a shape of the lamp aperture; and an optical aperture through the planar reflective element, disposed around a perpendicular axis of the planar reflective element, for light to pass through the planar reflective element. When the reflective iris is axially aligned with the parabolic lamp, the collimated light is reflected from the planar reflective element back towards the parabolic lamp, for reflection back through the optical aperture.

Abstract: An imaging system, comprising an image source and a plurality of microtile units for generating respective portions of an image, each microtile unit including a plurality of coupling mechanisms for connection to a plurality of other microtile units such that the microtile units may be arranged in multiple geometrical configurations, and each microtile unit including circuitry for communication with the other microtile units to control generation of each respective portion of the image.

Abstract: An imaging system, comprising an image source and a plurality of microtile units for generating respective portions of an image, each microtile unit including a plurality of coupling mechanisms for connection to a plurality of other microtile units such that the microtile units may be arranged in multiple geometrical configurations, and each microtile unit including circuitry for communication with the other microtile units to control generation of each respective portion of the image.

Abstract: A filter mounting apparatus for use with an optical filter placed between a projector lens and screen. The filter mounting apparatus comprises a metallic disk connected to the projector lens, and an assembly magnetically connected to the metallic disk for mounting the optical filter a predetermined distance from the projector lens.

Abstract: A filter mounting apparatus for use with an optical filter placed between a projector lens and screen. The filter mounting apparatus comprises a metallic disk connected to the projector lens, and an assembly magnetically connected to the metallic disk for mounting the optical filter a predetermined distance from the projector lens.