169 results about "Visible band" patented technology

Three retardation compensators are provided for compensating the retardation of liquid crystal devices for red, green and blue light, respectively. Each of the retardation compensators is composed of plural high and low refractive index thin film layers alternately layered on a substrate. Because of the difference in the wavelength dependences of the liquid crystal device and the retardation compensator, the retardation R2 of the retardation compensator becomes much larger than the retardation R1 of the liquid crystal device in short wavelength region of the visible band. In order to match the retardation, the thickness of the retardation compensator for blue light is smaller than those for red and green light.

A liquid crystal display (LCD) panel construction for producing color images for viewing by a viewer. The LCD panel construction comprises: an illumination panel for producing light including spectral components with wavelengths in a visible band of the electromagenetic spectrum; a plurality of pixel regions within a predefined image display area, wherein each pixel region has a plurality of subpixel region and each said subpixel region within each pixel region has a light transmission portion and a light blocking portion, and each light transmission portion and light blocking portion has a frontside disposed in the direction in the viewer and a backside in the direction of the illumination panel. The illumination panel illuminates the plurality of pixel regions from the backside thereof so that a color image is formed the said plurality of pixel regions for viewing. A pattern of broad-band reflector material is disposed in spatial registration with the backside of the light blocking portions of the subpixel regions, for reflecting produced light at structures associated with the light blocking portions of the subpixels, thereby recycling produced light for use in illuminating said plurality of pixel regions. A pattern of broad-band absorption material is also disposed in spatial registration with the frontside of the light blocking portions of the subpixel regions, for absorbing ambient light incident upon structures associated with the light blocking portions of the subpixels, thereby reducing glare at the surface of the LCD panel due to ambient light incident thereon.

A temporary visible image, such as a first down reference line, corporate logo, or text is projected onto a target surface by an orientation-stabilized, fiber-fed laser projector. The projector may include at least one cylindrical lens or at least one pair of X-Y scanners. One or more remotely located lasers, supplying optical energy at a single wavelength to the projector, accommodate projection of a monochromatic line pattern. Multi-colored images are accommodated by supplying, to the projector, the output of a plurality of lasers operating at different wavelengths within the visible band. The projector is suspended and conveyed as a unitary assembly by a suspension system adapted to maintain the projectors angular orientation and dynamically stabilize the image. If desired, two or more independently-suspended projection modules or groups of modules adapted to move in unison or independently over the length of the field may be employed.

The invention discloses an off-axis paraboloid off-axis amount measurement device and a method. The device comprises a converging light interferometer, a parallel light interferometer, an auto-collimating plane mirror, a flange plate and a marker for visible band high absorption. The principle of light linear propagation is used, the clear aperture geometrical center and the focal point of the off-axis paraboloid mirror are projected to the auto-collimating plane mirror and are marked respectively, and through measuring the marker distance, the off-axis amount of the off-axis paraboloid mirror is measured. The device and the method of the invention have the advantages that the principle is simple, operation is easy, and the off-axis paraboloid off-axis amount measurement problem can be solved.

A quantum nanodot processing system, comprising: at least one image capture camera configured to capture scenes including actors and / or objects in a visible band; and at least one marker capture camera configured to capture motions of the actors and / or objects applied with at least one quantum nanodot (QD) marker, wherein the at least one marker capture camera is tuned to capture narrowband IR signals emitted by the at least one QD marker.