Abstract: Smart glasses with an eye protection function comprise an adjustable focus liquid lens assembly and a drive mechanism. The lens assembly comprises a first lens, a second lens, and a transparent liquid-filled flexible film sandwiched between the first lens and the second lens. The focal length of the lens assembly is determined by the first lens, the second lens, and the flexible film together. The focal length of the flexible film changes as a thickness of the flexible film changes. The drive mechanism is configured to drive the flexible film to deform and thus enable the thickness of the flexible film to be changed such that the focal length of the lens assembly is switched between the first focal length and the second focal length. The glasses enable a user wearing it to blink his or her eyes unconsciously, thereby overcoming the drawback of prior art, and enhancing user experience.

Abstract: A Raman spectrometer includes a laser, a lens, a dichroscope, a confocal microscope, an optical system, a Fabri-Perot tunable filter and a silicon detector. The light emitted by the laser impinges on the dichroscope after passing through the lens. The dichroscope reflects the light, and the reflected light impinges on a sample through the confocal microscope. The light generates a Rayleigh scattering and a Raman scattering upon reaching the sample, scattered light generating the Rayleigh scattering and the scattered light generating the Raman scattering impinge on the dichroscope again after passing through the confocal microscope. The Raman scattered light transmitted by the dichroscope passes through the optical system and the Fabri-Perot tunable filter successively, and the light passing through the Fabri-Perot tunable filter is detected by the silicon detector to obtain a light signal. The Raman spectrometer has the advantages of small volume and low cost.

Abstract: A road lamp control method is disclosed, comprising steps of determining whether a road lamp lighting condition is satisfied, and controlling the road lamp lighting time period. The method can control ON and OFF and the brightness of the road lamps in real time based on the real traffic flow at night, and thereby ensuring safety of pedestrians and vehicles and saving electrical energy.

Abstract: A road lamp control method is disclosed, comprising steps of determining whether a road lamp lighting condition is satisfied, and controlling the road lamp lighting time period. The method can control ON and OFF and the brightness of the road lamps in real time based on the real traffic flow at night, and thereby ensuring safety of pedestrians and vehicles and saving electrical energy.

Abstract: The present disclosure provides a spectrophotometric colorimeter based on LED light source, wherein the spectrophotometric colorimeter includes an integrating sphere, a coupling light path, and a spectrometer. An inner wall of the integrating sphere is arranged with a composite light source consisting of eight LEDs; a sphere wall of the integrating sphere defines an incident aperture; light emitted from each LED enters an interior of the integrating sphere through the incident aperture and is irradiated onto the inner wall. The coupling light path is configured to couple light at a measurement caliber such that the light can enter an incident split and to eliminate stray light from the inner wall.

Abstract: A distributed optical fiber sensor based on Raman and Brillouin scattering is provided. The distributed optical fiber sensor includes a semiconductor FP cavity pulsed wideband optical fiber laser (11), a semiconductor external-cavity continuous narrowband optical fiber laser (12), a wave separator (13), an electro-optic modulator (14), an isolator (15), an Er-doped optical fiber amplifier (16), a bidirectional coupler (17), an integrated wavelength division multiplexer (19), a first photoelectric receiving and amplifying module (20), a second photoelectric receiving and amplifying module (21), a direct detection system (22), a narrowband optical fiber transmission grating (23), a circulator (24) and a coherence detection module (25). The temperature and the strain can be measured simultaneously, and the signal-to-noise ratio of the system is enhanced.

Abstract: A distributed optical fiber sensor based on Raman and Brillouin scattering is provided. The distributed optical fiber sensor includes a semiconductor FP cavity pulsed wideband optical fiber laser (11), a semiconductor external-cavity continuous narrowband optical fiber laser (12), a wave separator (13), an electro-optic modulator (14), an isolator (15), an Er-doped optical fiber amplifier (16), a bidirectional coupler (17), an integrated wavelength division multiplexer (19), a first photoelectric receiving and amplifying module (20), a second photoelectric receiving and amplifying module (21), a direct detection system (22), a narrowband optical fiber transmission grating (23), a circulator (24) and a coherence detection module (25). The temperature and the strain can be measured simultaneously, and the signal-to-noise ratio of the system is enhanced.