4 results about "Optical barrier" patented technology

A non-invasive biosignal measurement device based on skin effect removal, includes: a signal measurement instrument measuring a PPG signal of a measurement subject in contact with the skin on one side of a specific body part of the measurement subject; a signal reception unit receiving the PPG signal from the signal measurement instrument; and a ratio value calculation unit removing noise due to a skin effect from the PPG signal, and then calculating ratio values at different wavelengths for measuring a biosignal including blood sugar and glycated hemoglobin of the measurement subject. The signal measurement instrument includes a first sensor module including an optical barrier and a second sensor module for removing the skin effect.

The embodiment of the invention provides a commercial kitchen oil filter screen for a UVC exhaust fume collecting hood, and relates to the technical field of oil fume purification equipment. The oil filter screen comprises a top layer, a middle plate and a bottom layer, the top layer and the bottom layer are both V-shaped corrugated plates with opposite opening directions; the middle plate is an adaptive corrugated plate with ventilation holes; the three-layer structure key adopts a staggered stacking mode, so that wave crests and wave troughs of the middle plate and wave crests and wave troughs of the top layer and the bottom layer are mutually shielded in the vertical direction. The zigzag airflow channel is formed by the multi-layer staggered V-shaped structure, so that the oil fume interception efficiency is remarkably improved, and the removal rate can reach 92% or above; meanwhile, the staggered structure forms an optical barrier without a straight-through path, UVC ultraviolet light beams in the exhaust fume collecting hood can be completely prevented from leaking out, and personnel safety is guaranteed; in addition, due to the streamline design, low-wind-resistance and low-noise operation is guaranteed. The air purifier is reasonable in design structure, high in purification efficiency, good in safety and convenient to produce and assemble.

A light emitting structure includes one or more optical barriers which may have some gaps or discontinuity in order to decrease the amount of light absorbed by the optical barrier. The optical barrier may have a gap in the vertical direction between it and the substrate, or between it and the top of a side coat, or both. The optical barrier may have a gap or discontinuity in the horizontally direction, so that it does not fully surround the LED or phosphor horizontally. This may increase the light extraction efficiency of the light emitting structure.

A light emitting structure includes one or more optical barriers which may have some gaps or discontinuity in order to decrease the amount of light absorbed by the optical barrier. The optical barrier may have a gap in the vertical direction between it and the substrate, or between it and the top of a side coat, or both. The optical barrier may have a gap or discontinuity in the horizontally direction, so that it does not fully surround the LED or phosphor horizontally. This may increase the light extraction efficiency of the light emitting structure.