6 results about "Liquid crystal light valve" patented technology

This invention provides a metal mask for silicon-based liquid crystal light valve chips, relating to the field of semiconductor optoelectronic device manufacturing technology. It includes a metal substrate and a pixel aperture array, alignment mark area, stress buffer, and reinforced border disposed on the metal substrate, adaptable to mass production evaporation and photolithography processes for LCoS light valve chips. The metal substrate consists of four layers stacked sequentially from bottom to top: a substrate layer, a molybdenum transition layer, a Mo-Ta-N functional pattern layer, and an Al2O3-SiO2 composite passivation layer. The molybdenum transition layer is deposited on the substrate surface using magnetron sputtering, with a surface roughness Ra < 0.15 nm. The Mo-Ta-N functional pattern layer is deposited on the surface of the molybdenum transition layer using reactive magnetron sputtering. The near-vertical, low-roughness aperture sidewalls of this invention result in shadow-free evaporation, uniform electrodes, and clear edges, improving the light utilization and contrast of the LCoS chip. It also increases the utilization rate of the evaporation material and reduces material loss during mass production.

A light engine includes a housing, an optical assembly, a heat exchange device, and a fan. A first lens, a second lens, and the housing cooperatively define a first closed chamber. The first closed chamber includes an air-cooling chamber, a first heat exchange chamber, and a second heat exchange chamber. The first heat exchange chamber and the second heat exchange chamber are arranged on opposite sides of the light converging member, respectively. The air-cooling chamber is in communication with the first heat exchange chamber and the second heat exchange chamber. The liquid crystal light valve is arranged in the air-cooling chamber. A part of the heat exchange device is located in the first heat exchange chamber and / or the second heat exchange chamber. The air blower is provided in the first heat exchange chamber or the second heat exchange chamber.

The utility model discloses a kind of mask for preparing leakproof light liquid crystal light valve and its leakproof light liquid crystal light valve, its mask is additionally increased auxiliary mask layer on the basis of original main mask layer, so that the black pattern of main mask layer and the full black film of auxiliary mask layer form double light shielding pattern, so even if the black pattern of main mask layer appears light transmission needle eye due to the limitation of printing process, the full black film of auxiliary mask layer can also effectively shield the ultraviolet light emitted by exposure machine, to avoid the appearance of light transmission needle eye on ITO glass, and further avoid the appearance of light transmission needle eye on liquid crystal light valve, prevent the appearance of leaky light bad phenomenon of liquid crystal light valve, maximumly guarantee the display blackness of liquid crystal light valve, improve the light shielding performance of liquid crystal light valve and electric welding goggles or electric welding face guard.

This invention provides a method for aerial refueling positioning using targets and dual cameras. A microcontroller controls a target system consisting of a liquid crystal light valve, a button battery, and a reflector to actively flash light. Three targets are fixed to the refueling hose, and two targets are fixed to the receiver aircraft's fuel tank. Two cameras are mounted on the refueling aircraft to continuously photograph the five targets. Based on the camera's intrinsic and extrinsic parameters, the pixel positions of the targets in the photographs, and the target distances, linear and nonlinear equations are constructed. Solving these equations yields the three-dimensional coordinates of the five targets. Averaging these coordinates yields the coordinates of the hose center and the fuel tank center, as well as their deviation vector. Finally, the vertical vector of the hose plane is calculated using the three targets on the hose. Through decomposition, the three-dimensional error vector required for hose control is obtained, completing the error measurement during the aerial refueling process.

Disclosed is a single LCD projector structure switchable between ultra-short distance projection and medium-long distance projection including a projection module. The projection module includes an LED light source, a condenser cup, a collimating Fresnel lens, an LCD light valve and a focusing Fresnel lens arranged in sequence. The single LCD projector structure further includes a first total reflection mirror and an objective lens module including an objective lens ring and a telescopic mechanism for stretching and retracting of the objective lens ring. A single LCD projector is also provided. The objective lens is shared by ultra-short distance projection and the medium-long distance projection without changing its optical characteristics, thus the objective lens group can move rapidly in a large range and fine focusing is performed in the far end ring or the near end ring, which improves the flexibility and practicability of projection and is suitable for various application scenes.

The application discloses a terminal for wireless acquisition and real-time monitoring of operating room environment parameters. The monitoring terminal comprises a common-aperture packaging module, a multi-source energy capturing module, a sensing and logic control module, and a high-voltage direct-drive modulation module. The multi-source energy capturing module uses amorphous silicon photovoltaic panels to absorb visible light and output low-voltage direct-current electric energy, and uses a micro cantilever beam type friction nanogenerator to capture vertical laminar air supply kinetic energy and output transient high-voltage electric energy. The sensing and logic control module performs temperature and humidity sampling and differential pressure sampling and generates a digital baseband control sequence with direct-current balance characteristics. The high-voltage direct-drive modulation module directly applies the transient high-voltage electric energy to a micro-electro-mechanical system liquid crystal light valve through a photoelectric isolation interlocking switch, modulates environmental physical quantities onto a near-infrared probe light beam to form a backscattering light signal, and the system uses a diffuse reflection wall surface to construct a multipath reflection channel to overcome the blockage of a straight-line line-of-sight link caused by medical equipment.