Grid polarizing element, photo-orientation device, polarization method and method for manufacturing grid polarizing element
A grid polarization and component technology, applied in the field of polarization technology, can solve the problem that the extinction ratio polarization component has not yet been developed, and achieve high productivity and improve the effect of extinction ratio
Active Publication Date: 2015-01-14
USHIO DENKI KK
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[0016] In this way, in the application of optical processes such as photo-alignment, a practical polarizing element that can irradiate polarized light from the visible short-wavelength region to the ultraviolet region to a certain extent is desired, but the extinction ratio, transmission, etc. A polarizing element with such basic properties as high efficiency has not yet been developed
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[0048] Next, specific embodiments (embodiments) of the present invention will be described.
[0049] figure 1 is a schematic diagram schematically showing a grid polarizing element according to an embodiment of the present invention. figure 1 The grid polarizing element shown is mainly composed of a transparent substrate 1 and a grid 2 arranged on the transparent substrate 1 . The polarizing element of the embodiment has a structure similar to that of a wire grid polarizing element. As will be described later, the grid 2 is not a conductor (metal wire), so it is simply called a grid polarizing element.
[0050] "Transparent" of the transparent substrate 1 means having sufficient transmittance with respect to the wavelength of use (the wavelength of light polarized using a polarizing element). In this embodiment, it is assumed that light in the ultraviolet region is used as a wavelength, and therefore quartz glass (for example, synthetic quartz) is used as the material of the...
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The invention provides a grid polarizing element, a photo-orientation device, a polarization method and a method for manufacturing the grid polarizing element. The grid polarizing element is capable of irradiating the polarized light within a short wavelength region and an ultraviolet (UV) region to a larger region to some extent, and is excellent in extinction ratio, transmission rate and the like. A grid (2) on a transparent substrate 1 is made of amorphous silicon, wherein a refractive index real part n is larger than an attenuation coefficient k. The distance between every two adjacent line-shaped portions (21) of a grid (2) on one side is set to be t, and the distance between every two adjacent line-shaped portions (21) of a grid (2) on the other side is set to be T. Periodically and substantially, the segments of the grid are set in such a manner that t is smaller than T. The mean value of the widths of all the line-shaped portions (21) of the grid (2) is set to be w, and the relation that t / T is larger than the sum of 0.0159w and 0.3735 can be met.
Description
technical field [0001] The invention of the present application relates to polarization techniques using grid polarizing elements. Background technique [0002] Polarizing elements for obtaining polarized light include various optical elements such as polarizing filters and polarizing films, such as polarized sunglasses, which are also widely used in display devices such as liquid crystal displays. There are several types of polarizing elements according to the way to extract polarized light, one of which is a wire grid polarizing element. [0003] The wire grid polarizing element has a structure in which a fine striped grid made of metal (conductor) is provided on a transparent substrate. By making the grid interval smaller than the wavelength of light to be polarized, it functions as a polarizer. Among the linearly polarized light, for the polarized light having an electric field component in the longitudinal direction of the grid, it is equivalent to a flat metal, so re...
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Login to View More IPC IPC(8): G02B5/30G02F1/1337
CPCG02B5/3058G02F1/133528G02F1/133548G02B5/3075
Inventor 鹤冈和之影林由郎
Owner USHIO DENKI KK