6results about How to "Increase the optical path" patented technology

The application discloses an electronic paper display panel, a driving method thereof and a display device. The electronic paper display panel comprises a first substrate, a first electrode, a pixel definition layer, a reflection layer, a plasmonic resonance layer, an electrochromic component, a second electrode and a second substrate. The first electrode is arranged on the first substrate. The pixel definition layer is arranged on the first electrode. A plurality of microcavities arranged in an array are arranged in the pixel definition layer. The reflection layer is arranged on the sidewall and the bottom of the microcavities. The plasmonic resonance layer is used for generating structural color. The plasmonic resonance layer is arranged on the bottom of the microcavities and located on the reflection layer. The electrochromic component is arranged on the plasmonic resonance layer. Through the above design, the color saturation and the light reflectivity of the electronic paper can be improved.

This invention relates to a device for detecting alcohol content using infrared light. It includes a housing, characterized in that the housing contains a preheating tube, an infrared light source assembly, a flow sensor, an infrared detector, a U-shaped gas chamber, and a sampling pump. A blowing pipe is located at the bottom of the housing and is connected to the preheating tube. The flow sensor and infrared light source assembly are also located between the preheating tube and the U-shaped gas chamber. One end of the U-shaped gas chamber is connected to the preheating tube to ensure a constant temperature within the device. The U-shaped gas chamber is connected to the sampling pump via the infrared detector, which draws the gas to be measured into the U-shaped gas chamber. This invention, by incorporating the U-shaped gas chamber and preheating tube, employs preheating technology to maintain a constant temperature environment, adapting to testing under different conditions. Furthermore, the infrared light source assembly emits infrared light into the U-shaped gas chamber. Due to the U-shaped structure of the gas chamber, the optical path of the infrared light is increased by utilizing the principle of reflection, thereby improving the sensitivity of the infrared measurement.

The utility model discloses an optical fiber sensor and detection system thereof, relate to optical fiber sensor technical field, and the optical fiber sensor includes: first multimode optical fiber;Second multimode optical fiber;Photonic crystal fiber, and the both ends of photonic crystal fiber are connected with the end of first multimode optical fiber and second multimode optical fiber respectively, and photonic crystal fiber is curved structure, and there is a bending section between both ends;Among them, photonic crystal fiber has polishing surface, and the distance between the core center of photonic crystal fiber and polishing surface is less than the radius of photonic crystal fiber. Thus can prolong the optical path of optical fiber sensor, enhance evanescent wave penetration area, improve light leakage intensity, help to improve the coupling efficiency between the film on the surface of optical fiber sensor and light field, improve the sensitivity of optical fiber sensor. Polishing surface can reduce the wall thickness between the core of photonic crystal fiber and the outer wall of photonic crystal fiber, significantly enhance evanescent wave intensity and shorten the metal-light field interaction distance.

This invention provides a grating ruler displacement sensor based on an oblique incidence optical path, relating to the field of optical measurement technology, to address to some extent the problem of excessively large readhead size hindering installation in small spaces. The grating ruler displacement sensor based on an oblique incidence optical path provided by this invention includes a readhead module and a grating ruler. The readhead module includes a housing, a PCB, and a light source. The top wall of the housing has a mounting plane for mounting the PCB, which is mounted on the mounting plane. The light source is integrated on the side of the PCB facing the top wall of the housing. A light-emitting aperture is formed on the top wall of the housing corresponding to the position of the light source, allowing light emitted from the light source to exit the housing. The mounting plane is obliquely positioned and forms an angle with the outer surface of the top wall of the housing. The grating ruler is parallel to the outer surface of the top wall of the housing. Using the structure provided in this application, the overall thickness of the readhead can be made very small, thus enabling easy installation in confined spaces such as micro-machine tools and precision displacement stages.

The application relates to the technical field of hydrogen concentration optical visual detection, in particular to a hydrogen concentration detection device which comprises a detection table, an optical testing device body arranged on the detection table, a detection pipeline body in communication with one end of the optical testing device body, visual detection of a to-be-detected gas by the optical testing device body after the to-be-detected gas enters the detection pipeline body, a joint, a mixing assembly, a buffer assembly, a speed reduction assembly and a reflection assembly arranged in the detection pipeline body in sequence along a gas entering direction; the mixing assembly, the buffer assembly, the speed reduction assembly and the reflection assembly are arranged in the detection pipeline body in sequence, and the optical testing device body is combined with the optical regulation and control means of a beam splitter and a concave lens, the problem of uneven hydrogen distribution is solved through the mixing assembly, the gas flow rate is reduced and the contact time is prolonged through the buffer and speed reduction assembly, and finally the optical path is significantly prolonged through the optical assembly, and the detection signal is enhanced.

This invention discloses a back-contact solar cell, its fabrication method, a cell string, a cell module, and a photovoltaic system. The back-contact solar cell includes: a silicon substrate configured with a first conductivity type and including a first surface and a second surface; a first doped layer configured with the first conductivity type and located on the first surface; a second doped layer configured with the second conductivity type and located on the first surface; the first and second doped layers are alternately arranged along a first direction and extend along a second direction; the first doped layer is wavy along the second direction; and / or, the second doped layer is wavy along the second direction; a first electrode layer; and a second electrode layer. In this invention, light undergoes diffuse reflection on the wavy doped layer surface, resulting in more light being reflected back into the cell, increasing the contact area between the electrode layer and the doped layer, reducing contact resistance, and improving photoelectric conversion efficiency.