3results about How to "Shorten the optical path" patented technology

The utility model provides a kind of for the illumination reaction device of alfacalcidol, including the liquid storage tank to be lighted, circulating pump and illumination reaction tank formed by pipeline connection circulation passway, wherein: illumination reaction tank center is provided with the LED light of cylindrical shape, and there are a plurality of upper and lower interval arrangement partition plates in periphery, and the serpentine reaction channel of upper and lower bending is formed between a plurality of partition plates.The utility model illumination reaction device can realize uniform stable illumination reaction by the design of illumination reaction tank and serpentine reaction channel, reduce the optical path of reaction liquid, improve alfacalcidol illumination reaction efficiency and product quality consistency, effectively overcome the technical defects of traditional equipment.

This invention discloses a miniature beam-splitting optical path system for atomic interferometry, comprising a main optical path and primary and secondary reflection sub-paths. Laser light is input into the main optical path after purification and polarization, and then split by a half-wave plate and a polarizing beam-splitting prism. The split beam consists of a primary reflection and a secondary reflection generated by the secondary reflection, which passes sequentially through a quarter-wave plate and a 0° mirror and re-enters the polarizing beam-splitting prism. The primary and secondary reflections then enter their respective sub-paths for further splitting. Independently adjustable right-angle prisms and polarizing beam-splitting prisms within the sub-paths eliminate the influence of the incident direction of the light entering subsequent optical paths. This miniature beam-splitting optical path system and method can output multiple laser beams with consistent polarization, adjustable power and frequency. It can be input and output via fiber optic couplers, and is suitable for atomic interferometry and other fields. It improves the efficiency of laser energy utilization and the stability of laser parameters, easily maintains symmetrical optical path distribution, and enhances system integration.

The application discloses a MEMS sensor for continuous infrared spectrum detection and a preparation method thereof. The preparation method comprises the following steps: after cleaning a silicon substrate, depositing a first oxide layer and a second oxide layer on the front and back surfaces of the silicon substrate respectively, processing a metal thin film on the surface of the first oxide layer, depositing an infrared narrow-band filter film, performing patterning and etching to obtain a movable structure, etching the back surface of the first silicon substrate to make the movable structure suspended; cleaning and double-side oxidizing a second silicon substrate, preparing a first electrode layer, a pyroelectric film, a second electrode layer and a metal black infrared absorption layer on the surface of the first silicon oxide film, performing patterning and etching to obtain a second silicon substrate with a back cavity structure, and bonding the MEMS scanning mirror and the pyroelectric infrared detector. The movable structure prepared by the above preparation method is combined with the bonding of the pyroelectric infrared detector, the angle of the movable structure in the MEMS scanning mirror is modulated to realize continuous spectrum scanning in a certain waveband range, and the sensor structure is simplified.