A Fiber Bundle Coupler with Automatic Focus Positioning

Abstract

The invention discloses a fiber optics bundle coupler capable of automatically focusing positioning, and the coupler comprises a coupler socket which is used for fixing a coupler plug, and is provided with a positioning head which cooperates with a plug positioning groove on the coupler socket. The coupler plug accommodates a fiber optics bundle, and the coupler socket is provided with an objective lens chute corresponding to the plug positioning groove. A coupling objective lens is controlled to slide on the objective lens chute, receives a signal from the fiber optics bundle, and transmits the signal to a confocal imaging system. The relative position relation of the coupling objective lens and the section of the fiber optics bundle is judged, and the feedback control of the sliding of the coupling objective lens is carried out till the optimal coupling position is found, thereby achieving the automatic focusing positioning. The coupler provided by the invention improves the reliability of imaging coupling, and can achieve the compensation for the device wear caused by long-time use to a certain degree.

Description

technical field

[0001] The invention belongs to the field of optical technology, and more specifically relates to an optical fiber bundle coupler capable of automatic focusing and precise positioning. Background technique

[0002] In the fiber bundle-based confocal imaging system, the laser emits laser light, scans the end face of the fiber bundle through the laser scanning device and the coupling objective lens, and injects the laser into each fiber core of the fiber bundle after focusing. The diameter of the core is approximately 2-3um. At the other end of the fiber bundle, the injected laser light is focused on the object to be observed through the micro-objective lens, and the object to be observed emits fluorescence under the excitation of the injected laser light, and the fluorescence returns along the same path through the core of the fiber bundle, and is finally detected by the detector captured and imaged. Therefore, the precise positioning between the coupling ob...

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