Abstract: A light-guide optical element and a method for manufacturing the same, includes: a coating step including forming at least one functional coating on a surface of a substrate, and cutting the substrate to form at least one optical coating strip; a mounting step including placing at least one optical coating strip in a storage space of a first substrate; an assembling step including combining a second substrate corresponding to the first substrate with the first substrate, so that the at least one optical coating strip is positioned between the first substrate and the second substrate, forming a semi-finished product; and a cutting step including cutting the semi-finished product into at least one finished light-guide optical element, and the at least one finished light-guide optical element includes the at least one optical coating strip.

Abstract: A glasses projection control system includes: a CPU for outputting a first and a second projection information; a projection mechanism connected to the CPU for outputting a first and a second beams of light; a lens module used to refract the beams of light, when the first beam of light is projected onto the lens, a unfolded image is formed, when the second beam of light is projected onto the lens, it forms a hidden image which is smaller than the unfolded image, and the unfolded image is located in the center of the lens than the hidden image; and a detection system including an information acquisition unit and a computing unit, the information acquisition unit captures image or sound information, when determining that a person or object enters the detection range, the computing unit sends covert signal to the CPU to make it output the second projection information.

Abstract: A narrow bandpass filtering element includes a substrate, a bandpass filtering structure and an anti-reflection structure, and the bandpass filtering structure and anti-reflection structure are formed on two opposite surfaces of the substrate respectively. The bandpass filtering structure includes NbTiOx layers, first material layers with a higher refractive index than the NbTiOx layer, and second material layers with a lower refractive index than the NbTiOx layer, and the NbTiOx layers, first material layers and second material layers are stacked along a normal line of the substrate. Therefore, light in a specific wave band fitting a narrow passband can pass through the narrow bandpass filtering element.