Novel microsphere lifting and supporting system and method in vacuum optical tweezers
A branching system and microsphere technology, which is applied in the field of new microsphere branching system, can solve the problems such as difficult to control the number of microspheres, and achieve the effects of precise measurement, increasing the number of branching, and reducing pollution
Active Publication Date: 2022-02-15
ZHEJIANG UNIV +1
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In addition, both are difficult to control the number of microspheres released each time: at the beginning of the vibration desorption method, there are more microspheres attached to the substrate, and the number of microspheres released each time is also large. The number of microspheres released each time will continue to decrease, and the number of microspheres contained in the mist sprayed by the spray suspension method has a large randomness
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[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0028] Such as figure 1 As shown, including vacuum chamber VC, microsphere MS, encapsulation material A and starting laser L;
[0029] A columnar wrapping substance A is fixed in the vacuum chamber VC. The wrapping substance A is solid at room temperature and is any one of ammonium carbamate, ammonium chloride or ammonium bicarbonate, but not limited thereto. It is easy to decompose and volatilize after heating A plurality of microspheres MS are fixed and evenly spaced along the columnar direction in the packaged material A, and one or more microspheres MS are packaged in each unit volume of the packaged material A, and the microspheres MS are arranged in a row along the columnar direction of the packaged material A , by adjusting the distribution density of the microspheres MS in the package material A and the irradiation area of ...
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The invention discloses a novel microsphere lifting and supporting system and method in vacuum optical tweezers. A columnar wrapping substance is fixed in the vacuum cavity; a plurality of microspheres are uniformly and fixedly wrapped in the wrapping substance at intervals; a light-transmitting optical window is formed in the cavity wall of the vacuum cavity; and supporting laser outside the vacuum cavity irradiates the tail end of the wrapping substance through the light-transmitting optical window, so that the wrapping substance absorbs heat and is decomposed, and one or more microspheres are released. According to the method, the wrapping substance is heated and decomposed to release the microspheres through the supporting laser by utilizing the property that the wrapping substance is easy to decompose, so that the limitation on the size of the microspheres is reduced; meanwhile, as the branch laser is emitted from the outside of the vacuum cavity, additional connection is avoided, the sealing performance of the environment is improved, the interference of external environment input is reduced, and precise measurement is facilitated. According to the invention, the number of the microspheres released in each time of supporting can be accurately controlled, pollution of redundant microspheres to a vacuum cavity is reduced, the number of supporting times is increased, and the success rate of capturing a single microsphere by optical tweezers is improved.
Description
technical field [0001] The invention relates to a microsphere branching method, which belongs to the technical field of precision measurement, in particular to a novel microsphere branching system and method in vacuum optical tweezers. Background technique [0002] Vacuum optical tweezers are a means of measuring high-precision mechanical quantities. Its principle is to use the interaction of light to objects to levitate and capture objects in a vacuum, and then measure the motion state of the captured objects to obtain the desired mechanical quantity. Its measurement accuracy for acceleration can reach 9.5E-8g / rtHz, and the measurement accuracy for extremely weak force can reach 9.5E-19N / rtHz. Therefore, vacuum optical tweezers is a cutting-edge measurement technology with great potential. [0003] The carrier for vacuum optical tweezers to measure weak mechanical quantities is microspheres, generally micron or submicron dielectric spheres. During the measurement process...
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IPC IPC(8): G21K1/00
CPCG21K1/006Y02E30/10
Inventor 陈杏藩陈铭胡慧珠高晓文李楠刘承
Owner ZHEJIANG UNIV