3 results about "Field angle" patented technology

The invention belongs to the field of image observation equipment and provides a micro-distance and wide-angle observation shooting device. The device comprises a parallel light source module, a wide-angle and micro-distance observation device, a pressing plate, a glass plate and a polarizer. An observed object is arranged between the pressing plate and the glass plate. The wide-angle and micro-distance observation device is arranged on the inner side of the glass plate. The view-field angle of the wide-angle and micro-distance observation device is larger than or equal to two times the Brewster angle. The parallel light emitted from the parallel light source module passes through the glass plate and then is reflected to produce the reflected light. The polarizer is used for eliminating the reflected light which is incident to the wide-angle and micro-distance observation device. The included angle between the optical axis of the parallel light emitted from the parallel light source module and the optical axis of the lens of the wide-angle and micro-distance observation device is the Brewster angle. The parallel light source module includes a plurality of parallel light source units. According to the technical scheme of the invention, the parallel light source units and the parallel light source module are applied to the wide-angle and micro-distance observation. Therefore, the problems that the glass plate reflects the light so as to cause the limited condition of both the lighting and the observation can be solved.

A liquid crystal display device includes a display element with a pair of substrates, a liquid crystal layer between the substrates, and an alignment film on a surface of at least one substrate facing the layer; a pair of polarizers on both surfaces of the liquid crystal element to sandwich the liquid crystal element; and at least one optical phase element between at least one of the polarizers and the liquid crystal element, wherein an optical refractive ellipsoid of the optical phase element is tilted clockwise or counterclockwise from the normal of a surface of the optical phase element, wherein at least one of rates of variation of an ordinary refractive index and an extraordinary refractive index of a liquid crystal material of the liquid crystal layer with respect to a wavelength is set in a range where viewing angle dependent coloring does not occur on a screen.

The invention discloses a method for solving the problem of the flickering of a complex target and a background model of a target simulator, and belongs to the technical field of semi-physical simulation system tests. The method adopting the technical scheme mainly comprises the following steps of introducing creator software into a refined model created by third party software; performing structure optimization and attribute optimization; processing polygons and facets, and resetting the processed polygons and the processed facets; deleting overlapped surfaces; completing seams; finally, performing later-period optimization on a complete target scene by an LOD manner according to the field angle parameter of the target simulator, the field angle parameter of a guiding head, and design requirements for the simulation of trajectory to guarantee that during loading and running, a generated image is natural in transition and has no flickering. The method disclosed by the invention provides a series of procedures which are suitable to be applied to the target simulator to solve the problem of flickering. The problem of the flickering of the target scene image output by the target simulator to the guiding head can be effectively solved, the stability of the scenery image effect is guaranteed when the guiding head captures and controls a target, and the confidence coefficient of simulation results is increased.