Variable-focus oral cavity digital observation instrument based on liquid lens

Abstract

The invention relates to a variable-focus oral cavity digital observation instrument based on a liquid lens. The instrument comprises a lens module, a control module and an image sensor, wherein the lens module comprises a liquid lens, the control module comprises a processing unit, a liquid lens driving unit and a manual focusing control input end, the processing unit is connected with the imagesensor, the liquid lens driving unit is connected with the manual focusing control input end and the liquid lens, an input optical signal is converted into a digital electric signal by the image sensor to be output to the processing unit, and an input signal of the manual focusing control input end is converted into a driving signal by the liquid lens driving unit to control the liquid lens to adjust the focus. The digital observation instrument has the advantages that the structural design is simplified to a greater extent, a focusing system can be achieved within an extremely small fixing distance range, the extremely wide focus changing range of the liquid lens allow the liquid lens to be capable of adapting to focus changing and focusing in an extremely wide distance range, and the variable-focus oral cavity digital observation instrument is more suitable for a complicated oral cavity environment.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a variable-focus oral cavity digital viewer based on a liquid lens. Background technique [0002] In recent years, with the development of oral digitalization, oral digital viewers have been rapidly popularized and widely used in clinical oral medicine. It observes the intraoral tissue under the illumination of its own light source, obtains its details, and images it on the corresponding CMOS or CCD image sensor through the optical lens, and then sends it to the display after photoelectric conversion and image signal processing, and the display is clear The magnified image is for the dentist to observe, which in turn helps the dentist to make a clinical diagnosis or treatment. The use of the oral viewer can help the dentist observe the key parts that are difficult to see with the naked eye and the mouth mirror, such as the position of the root canal opening in the medu...

AI Technical Summary

Problems solved by technology

[0004] 1. For the design of manual focusing, the existing digital oral viewers use optical lenses to achieve zooming. The equipment is large and the operation is inconvenient. Complicated structural design; on the other hand, it is difficult to complete precise digital control

[0005] 2. For the design of automatic zoom, in clinical applications, due to the limitations of hardware conditions and the limitations of the automatic focus algorithm itself (it is necessary to first calculate several frames of video data that have been collected, and its own computational complexity) , resulting in a longer focusing process, and the image becomes blurred during the focusing process, affecting user experience

Moreover, due to the complexity of the intraoral imaging environment, it greatly affects the accuracy of the execution results of the autofocus algorithm

At the same time, during the automatic focusing process of the current digital oral viewer, the intervention input of the dentist cannot be added, so the following situation inevitably exists clinically: the target area that the digital oral viewer automatically focuses on and the observation area that the dentist is interested in There is a deviation

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