CN209884102U

CN209884102U - Focusing lens mechanism based on MEMS mechanism and automatic zooming oral cavity observer

Info

Publication number: CN209884102U
Application number: CN201920294619.6U
Authority: CN
Inventors: 韩愚
Original assignee: SHANGHAI HANDI MEDICAL EQUIPMENT Co Ltd
Current assignee: SHANGHAI HANDI MEDICAL EQUIPMENT Co Ltd
Priority date: 2019-03-08
Filing date: 2019-03-08
Publication date: 2020-01-03
Anticipated expiration: 2029-03-08

Abstract

The utility model discloses a focusing lens mechanism and automatic zoom oral cavity visualizer based on MEMS mechanism. The former comprises a focusing lens barrel, the front part of the lens barrel is provided with a focusing lens group consisting of a plurality of lenses, and the rear part of the lens barrel is provided with an MEMS mechanism; the MEMS mechanism comprises a movable plate, a fixed plate, a movable electrode, a fixed electrode, a silicon circuit board, an upper glass circuit board and a lower glass circuit board; an external voltage is arranged between the movable electrode and the fixed electrode; the front end movable plate of the MEMS mechanism is fixedly connected with the focusing lens group, and the rear end of the MEMS mechanism is fixedly connected with the CMOS image sensor. The latter also includes a PCB circuit board with image acquisition, processing and transmission functions. The movement of the lens on the MEMS mechanism can be controlled through voltage, so that the focal length of the whole lens group is changed, and the zooming function is realized. Compared with a VCM zoom lens, the adjustable stroke is longer, the focusing speed is higher, the thickness is thinner, and the optical anti-shake function is realized.

Description

Focusing lens mechanism based on MEMS mechanism and automatic zooming oral cavity observer

Technical Field

The utility model belongs to the technical field of medical instrument, a focusing lens mechanism based on MEMS mechanism is related to and an automatic oral cavity visualizer that zooms based on MEMS mechanism.

Background

The digital oral cavity observation instrument (oral cavity endoscope) is used for local photography, examination, diagnosis and the like of the oral cavity, and brings brand new operation convenience and comfort to dentists and patients. An oral cavity observation instrument with an automatic zooming function generally comprises a focusing lens mechanism, wherein the focusing lens mechanism is provided with a focusing lens cone, a focusing lens group consisting of a plurality of lenses is arranged at the front part of the focusing lens cone, a CMOS image sensor is arranged at the rear part of the focusing lens cone, a PCB circuit board is connected behind the CMOS image sensor, the PCB circuit board is connected with a computer or a display, oral cavity shooting can be carried out, a proper angle (of a part to be shot) is found by using the full dynamic image searching function of an endoscope, and then an ideal image can be obtained by pressing an image capturing button, so that decayed teeth of an occlusion part or an adjacent surface in the oral cavity of a patient can be detected, and even decayed teeth in an initial stage ignored by X rays.

The existing digital oral cavity observation instrument generally adopts a VCM zoom lens to carry out automatic zooming and focusing, and the automatic zooming and focusing mode adopting the VCM zoom lens has the advantages of low focusing speed, short adjustable stroke, large volume and no optical anti-shake function, and the hand shaking has great influence on the imaging quality during photographing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide one kind and focus the speed faster, adjustable stroke is longer, small, have the optics anti-shake function based on the focusing lens mechanism of MEMS mechanism to and an automatic zoom oral cavity visualizer based on MEMS mechanism.

The technical scheme of the utility model as follows:

the utility model relates to a focusing lens mechanism based on an MEMS mechanism, which comprises a focusing lens cone, wherein the front part of the focusing lens cone is provided with a focusing lens group consisting of a plurality of lenses, and the rear part of the focusing lens cone is provided with the MEMS mechanism; a control button is arranged beside the MEMS mechanism on the focusing lens barrel; the MEMS mechanism comprises a movable plate, a fixed plate, a movable electrode, a fixed electrode, a silicon circuit board integrated with an electronic circuit, an upper glass circuit board and a lower glass circuit board; the movable electrode is connected with the movable plate and is connected with the upper glass circuit board and the silicon circuit board; the fixed electrode is connected with the fixed plate and connected with the lower glass circuit board and the silicon circuit board; an external voltage is arranged between the movable electrode and the fixed electrode; the focusing lens group consisting of a plurality of lenses is fixedly arranged on the movable plate at the front end of the MEMS mechanism; a CMOS image sensor is fixedly arranged on a rear end fixing plate of the MEMS mechanism; namely, the front movable plate of the MEMS mechanism is fixedly connected with the focusing lens group, and the rear end of the MEMS mechanism is fixedly connected with the CMOS image sensor.

Further, the focusing lens mechanism based on the MEMS mechanism is also provided with a lens between the rear end of the MEMS mechanism and the CMOS image sensor. Thereby further lengthening the focusing range (i.e., depth of field) of the focus lens mechanism.

The two modes can realize focusing by controlling the movement (converting electricity into mechanical motion) of the front end lens of the MEMS mechanism through voltage, and the automatic focusing function can be realized through an algorithm. Namely, the MEMS mechanism is controlled through voltage, so that the movement of the lens on the MEMS mechanism is controlled, the focal length of the whole lens group is changed, and the zooming function is realized. The above two approaches are mainly needed for designing different focal lengths and depths of field. The principle of zooming is the same.

The utility model relates to an automatic zooming oral cavity observer based on an MEMS mechanism, which comprises the focusing lens mechanism based on the MEMS mechanism and a PCB circuit board with image acquisition, processing and transmission functions; an ISP image processing chip is arranged on the PCB circuit board; the PCB circuit board is connected with the CMOS image sensor of the focusing lens mechanism based on the MEMS mechanism through a soft PC connecting wire; the PCB circuit board can be connected with a computer or a display.

Further, the automatic zoom oral cavity observation instrument further comprises an ODU interface; the PCB circuit board can be connected with a computer or a display through an ODU interface.

Furthermore, the PCB circuit board is also provided with a CPU central processing unit and a display output module; the CMOS image sensor is respectively connected with a central processing unit on the PCB circuit board and a signal input port of the ISP image processing chip; the image capturing button is respectively connected with a central processing unit on the PCB circuit board and a signal output port of the ISP image processing chip; and the display output module on the PCB is connected with the display through an ODU interface.

MEMS devices, i.e. micro-electromechanical systems, mainly include micro-mechanical devices (movable and fixed plates), micro-sensors, micro-actuators, and corresponding processing circuits (electronic circuits). It is a general name of equipment which integrates tiny mechanical important parts, micro sensors, electronic circuits and the like on the same silicon circuit board, glass circuit board, organic material and the like, and the main parts of the equipment are manufactured by semiconductor integrated circuit manufacturing technology.

The utility model has the advantages that:

the utility model discloses an automatic zoom oral cavity visualizer based on MEMS mechanism, relative to VCM zoom lens, the adjustable stroke is longer; the focusing speed is higher relative to the VCM zoom lens; the thickness is thinner and the volume is small; can integrate the optical anti-shake function and has the optical anti-shake function.

Drawings

Fig. 1 is a schematic structural diagram of a focus lens mechanism based on an MEMS mechanism according to the present invention;

FIG. 2 is a schematic diagram of the structure and principle of the MEMS mechanism of the present invention;

fig. 3 is a schematic structural diagram of an automatic zoom oral cavity viewer (backward focus adjustment) based on the MEMS mechanism of the present invention;

fig. 4 is a schematic structural diagram of an automatic zooming oral cavity observer (forward focal length adjustment) based on the MEMS mechanism of the present invention.

In the figure: 1. lens 2, MEMS mechanism 3, CMOS image sensor 4, control button 5, PCB circuit board 6, ISP image processing chip 7, ODU interface 8, movable electrode 9, fixed electrode 10, focusing lens barrel 11, soft PC connecting line A, movable plate B and fixed plate

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

Examples

As shown in fig. 1, the present invention relates to a focusing lens mechanism based on MEMS mechanism, which comprises a focusing lens barrel 10, a focusing lens group composed of a plurality of lenses 1 is disposed at the front part of the focusing lens barrel 10, and an MEMS mechanism 2 is disposed at the rear part of the focusing lens barrel 10; a control button 4 (also an image capture button) is provided on the focus lens barrel 10 beside the MEMS mechanism 2.

As shown in fig. 2, the MEMS mechanism 2 includes a movable plate a, a fixed plate B, a movable electrode 8, a fixed electrode 9, a silicon circuit board integrated with an electronic circuit, and upper and lower glass circuit boards; the movable electrode 8 is connected with the movable plate a, and is connected with the upper glass circuit board and the silicon circuit board; the fixed electrode 9 is connected with the fixed plate B and connected with the lower glass circuit board and the silicon circuit board; an applied voltage is provided between the movable electrode 8 and the fixed electrode 9.

As shown in fig. 3 and 4, the utility model relates to an automatic zoom oral cavity observation appearance based on MEMS mechanism, it includes above-mentioned focusing lens mechanism based on MEMS mechanism, still includes the PCB circuit board 5 that has image acquisition, processing and transmission function, still includes the ODU interface 7 of being connected with PCB circuit board 5.

As shown in fig. 3 and 4, the front movable plate a of the MEMS mechanism 2 is fixedly connected to a focusing lens group composed of a plurality of lenses 1, and the rear end of the MEMS mechanism 3 is fixedly connected to the CMOS image sensor 3; an ISP image processing chip 6 is arranged on the PCB circuit board 5; the PCB circuit board 5 is connected with the CMOS image sensor 3 through a soft PC connecting wire 11; the PCB circuit board 5 can be connected to a computer or a display through an ODU interface 7.

As shown in fig. 3 and 4, the MEMS mechanism 2 can control the focusing lens group composed of a plurality of lenses 1 fixedly connected to the MEMS mechanism to move forward or backward by voltage, thereby changing the focal length of the whole lens group (i.e. adjusting the focal length forward or backward) to realize the zooming function.

The PCB circuit board 5 is provided with a CPU central processing unit and a display output module besides an ISP image processing chip 6; the CMOS image sensor 2 is respectively connected with a central processing unit on the PCB circuit board 5 and a signal input port of the ISP image processing chip 6; a focusing lens group consisting of a plurality of lenses 1 is connected with an ISP image processing chip 6 on a PCB circuit board 5 sequentially through an MEMS mechanism 2 and a CMOS image sensor 3; the control button 4 is respectively connected with a central processing unit on the PCB circuit board 5 and a signal output port of the ISP image processing chip 6; the display output module on the PCB 5 is connected to the display through the ODU interface 7.

The utility model discloses an automatic zoom oral cavity visualizer based on MEMS mechanism realizes zooming automatically through MEMS mechanism, can reach following function and effect:

1) the camera lens is fixed on one structural component (namely, a movable plate A) in the MEMS mechanism, the CMOS image sensor is fixed on the other structural component (namely, a fixed plate B) in the MEMS mechanism, and the relative positions of the two structural components in the MEMS mechanism, namely, the movable plate A and the fixed plate B can be controlled by controlling voltage, so that zooming is realized.

2) The distance between the movable plate a and the fixed plate B (i.e., the lens stroke) can be made longer with respect to the VCM zoom.

3) In contrast to VCM zooming, MEMS mechanisms directly convert electricity into mechanical motion, allowing for wider and therefore faster focusing speeds.

4) The MEMS mechanism zooms mechanically, so that a lens is not easy to shake; the VCM zooming is realized by converting electricity into a magnetic field and utilizing acting force generated by the magnetic field, and compared with the automatic zooming of an MEMS mechanism, the VCM zooming is easier for a lens to shake.

Claims

1. A focusing lens mechanism based on an MEMS mechanism is characterized by comprising a focusing lens barrel, wherein a focusing lens group consisting of a plurality of lenses is arranged at the front part of the focusing lens barrel, and an MEMS mechanism is arranged at the rear part of the focusing lens barrel; a control button is arranged beside the MEMS mechanism on the focusing lens barrel; the MEMS mechanism comprises a movable plate, a fixed plate, a movable electrode, a fixed electrode, a silicon circuit board integrated with an electronic circuit, an upper glass circuit board and a lower glass circuit board; the movable electrode is connected with the movable plate and is connected with the upper glass circuit board and the silicon circuit board; the fixed electrode is connected with the fixed plate and connected with the lower glass circuit board and the silicon circuit board; an external voltage is arranged between the movable electrode and the fixed electrode; the focusing lens group consisting of a plurality of lenses is fixedly arranged on the movable plate at the front end of the MEMS mechanism; a CMOS image sensor is fixedly arranged on a rear end fixing plate of the MEMS mechanism; namely, the front movable plate of the MEMS mechanism is fixedly connected with the focusing lens group, and the rear end of the MEMS mechanism is fixedly connected with the CMOS image sensor.

2. The MEMS mechanism-based focus lens mechanism of claim 1, wherein a mirror plate is also disposed between the back end of the MEMS mechanism and the CMOS image sensor.

3. An automatic zoom oral cavity viewer based on an MEMS mechanism, comprising the focus lens mechanism based on an MEMS mechanism as claimed in claim 1 or 2, further comprising a PCB circuit board having image acquisition, processing and transmission functions; an ISP image processing chip is arranged on the PCB circuit board; the PCB circuit board is connected with the CMOS image sensor of the focusing lens mechanism based on the MEMS mechanism through a soft PC connecting wire; the PCB circuit board can be connected with a computer or a display.

4. The MEMS mechanism based auto-zoom oral scope of claim 3, further comprising an ODU interface; the PCB circuit board can be connected with a computer or a display through an ODU interface.

5. The automatic zoom oral cavity viewer based on MEMS mechanism of claim 4, wherein the PCB circuit board is further provided with a CPU central processing unit and a display output module; the CMOS image sensor is respectively connected with a central processing unit on the PCB circuit board and a signal input port of the ISP image processing chip; the image capturing button is respectively connected with a central processing unit on the PCB circuit board and a signal output port of the ISP image processing chip; and the display output module on the PCB is connected with the display through an ODU interface.