Abstract:
A glasses-type device can include a display part configured to emit image light serving as an image source of a virtual image; a diffraction element configured to reflect and diffract the image light at a predetermined angle; and a first holographic optical element disposed on at least a portion of glass of the glasses-type device, in which the first holographic optical element is configured to cancel dispersion of the image light that is reflected and diffracted by the diffraction element, and reflect the light in which dispersion is canceled to display a virtual image corresponding to the image light.
Abstract:
The present invention relates to a separation membrane having both antibiotic and hydrophilic properties for water treatment and a preparation method thereof. In the separation membrane of the present invention, since an organic compound (antimicrobial and/or hydrophilic compound) is chemically conjugated to non-metal inorganic nanoparticles or metal nanoparticles, the nanoparticles are not eluted from the separation membrane even when the separation membrane is used for water treatment for a long period of time, so that the separation membrane may continuously maintain antimicrobial properties and high water permeability, is safe to the human body even when used for the treatment of drinking water, such as water purification, and exhibits characteristics in which stain resistance is also significantly enhanced due to antimicrobial and hydrophilic properties, which have been continuously imparted. Furthermore, high mechanical strength is exhibited by a metal or inorganic nanofiller introduced.