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Waveguide-type Multidirectional Light Field Display
나형주,이승민,류영화,박가연,송석호 한국광학회 2022 Current Optics and Photonics Vol.6 No.4
We demonstrate two types of light field displays based on waveguide grating coupler arrays: a line beam type and a point source type. Ultra violet imprinting of an array of diffractive nanograting cells on the top surface of a 50-μm-thin slab waveguide can deliver a line beam or a point beam to a multidirectional light field out of the waveguide slab. By controlling the grating vectors of the nanograting cells, the waveguide modes are externally coupled to specific viewing angles to create a multidirectional lightfield display. Nanograting cells with periods of 300 nm–518 nm and slanted angles of −8.5°–+8.5° are fabricated by two-beam interference lithography on a 40 mm × 40 mm slab waveguide for seven differ-ent viewpoints. It is expected that it will be possible to realize a very thin and flexible panel that shows multidirectional light field images through the waveguide-type diffraction display.
金淳貴,安晶愛,柳珠甫,李在卿,崔英華,許美順 曉星女子大學家政學會 1976 효대가정학회지 : 효성여대 Vol.6 No.1
As a reault of observing the contained sodium and potassium in Kelp distributed to the areas. 1. The contained sodium and potassium in Kelp Masan>Kampo>Yulsan. 2. The contained sodium in Kelp is approximately propotional to the contained potassium in it. 3. In above I, The contained sodium in Kelp decrease by 0.1㎎% orderly, and so do the contained potassium in Kelp.