A switching device for an optical mirror group

Abstract

The invention discloses a switching device for an optical lens set. The device includes a bottom plate and a drive platform vertically fixed on the bottom plate and further includes a front lens set and a rear lens set which are fixed on the bottom plate; a to-be-switched lens set module is located between the front lends set and the rear lens set and embedded into the bottom plate through a positioning module; the horizontal part of the drive platform is fixedly provided with a drive motor and a ball screw which is fixedly connected with a rotating shaft of the drive motor, a guiderail is fixed on the vertical part of the drive platform, and the vertical part of the drive platform are sequentially provided with two photoelectric sensors in the longitudinal direction; the to-be-switched lens set module includes a lens set and a pre-pressing plate elastically connected with the lens set, a feed screw nut and a slider are fixed on the pre-pressing plate, the feed screw nut is in cooperation and connection with the ball screw, the slider can move up and down along the guide rail, and the pre-pressing plate is connected with a trigger part for triggering the photoelectric sensors. According to the switching device for the optical lens set, no manual operation is needed, the coaxial accuracy of the optical axes of the lens sets can be ensured in the multiple switching processes.

Description

technical field [0001] The invention relates to a switching device for an optical mirror group, belonging to the technical field of optical equipment. Background technique [0002] Optical coherence tomography (OCT, Optical Coherence Tomography) is a three-dimensional imaging technology that has a wide range of applications, especially in biomedical imaging, including ophthalmology, cardiovascular, dermatology and other diagnostic imaging. OCT imaging technology has the advantages of high resolution, fast imaging speed and high sensitivity. Since the first commercial OCT imaging equipment came out in 1996, OCT technology has greatly promoted the development of medical diagnosis, especially ophthalmology diagnostics. There are two types of OCT image objects, one is the retinal OCT image, that is, the optically designed object plane falls on the retina, and the system takes the OCT image for the retina; the other is the anterior segment OCT image, that is, the optically desig...

AI Technical Summary

Problems solved by technology

[0003] The lens group switching of optical instruments includes external switching and internal switching. External switching methods such as patent US2008 / 0106696A1 require manual operation by the user, which is less convenient and difficult to take into account the internal fixation lamp; some internal switching methods such as CN102438505 rely on multiple chips Planar reflective optical elements switch between two independent optical paths, resulting in complex optical paths, requiring high positioning accuracy, difficult installation and calibration, and large structural dimensions; internal switching methods such as US8427654 and US20080106696A1, by moving the middle image plane of the system to In front of the eyes, the available field of view is relatively small, and this design is difficult to achieve telecentric imaging, which limits the ability of the system for quantitative measurement

And it is inconvenient for the user to operate, and the lens group needs to be switched manually, and the precision optical lens group is exposed, which greatly increases the risk of damage

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