8 results about "Membrane mirror" patented technology

The invention discloses a novel method for measuring the surface shape of a large-aperture film mirror surface, and the method comprises the steps: obtaining a reflected deformed fringe image based on a four-step phase shift method, and obtaining the wrapped phase distribution of the image after modulation; performing labeling processing on the level of the wrapped phase distribution by using a Gray code to obtain unpacked phase distribution; a camera is used for collecting a film mirror image, center coordinate and radius labeling is carried out on the image, center coordinate symmetry operation is carried out on unpacking phase distribution, and phase change is obtained; obtaining the relation between the phase change and the gradient, obtaining the coefficient matrix of the first 36 constant terms of the zernike polynomial by using the least square method, further obtaining the surface shape data of the thin film mirror surface, and outputting the current surface shape data of the thin film mirror surface when the difference value of the current and later surface shape data of the thin film mirror surface reaches a convergence threshold value, thereby completing the measurement of the surface shape of the thin film mirror surface. According to the invention, the problems of large stripe deformation and discontinuous phase caused by overlarge mirror gradient are solved, and the limitation of film mirror measurement is solved.

The invention relates to the technical field of medical instruments, in particular to a frameless amniotic membrane mirror device, a manufacturing method and a using method, and the frameless amniotic membrane mirror device comprises an amniotic membrane tissue layer and a biocompatible thin film layer formed by spraying a mixed solution of polymethyl acrylate and polyvinyl alcohol; the overall diameter of the device is 14 mm, the rise of the device is 6.2 + / -0.1 mm, and the device can be directly implanted into the ocular surface to cover the cornea without a frame support. The manufacturing method comprises the steps of amniotic membrane treatment, model eye forming, mixed solution preparation, membrane spraying and forming, trimming and sterilization. The application method relates to implantation after surface anesthesia, fitting observation and subsequent taking-out. Through the frameless conformal fitting design, the problems that an existing framed amniotic membrane mirror is displaced and cannot be worn by a patient with strong foreign body sensation and shallow conjunctival sac are solved, and meanwhile secondary trauma of a suture operation is avoided. And the residual film after the amniotic membrane is dissolved can continuously provide protection, and the amniotic membrane has the advantages of good fitness, high patient comfort, simplicity and convenience in operation and good safety.

The embodiment of the invention discloses an MEMS micromirror and an electromagnetic MEMS micromirror. The electromagnetic MEMS micromirror comprises a substrate, an annular bearing part, a reflecting mirror, a coil, an x-axis torsion beam, a y-axis torsion beam, a piezoresistive feedback structure, an input terminal and an output terminal. Specifically, the substrate is provided with a hollow structure, the annular bearing part is rotatably arranged in the hollow structure, the reflector is connected with the annular bearing part, the coil is arranged on the annular bearing part, the x-axis torsion beam is connected with the substrate and the annular bearing part, the y-axis torsion beam is connected with the reflector and the annular bearing part, and the input terminal inputs an excitation signal to drive the coil. The output terminal outputs a piezoresistive feedback signal transmitted by the piezoresistive feedback structure, and the piezoresistive feedback structure comprises a first piezoresistive feedback structure located on the x-axis torsion beam and a second piezoresistive feedback structure located on the y-axis torsion beam. Wherein the input terminal and the output terminal are located on the same side of the MEMS micromirror.

Microelectromechanical system (MEMS) devices, methods of operating the MEMS device, and methods of manufacturing the MEMS device are disclosed. In some embodiments, the MEMS device includes a glass substrate; an electrode on the glass substrate; a hinge mechanically coupled to the electrode; a membrane mirror mechanically coupled to the hinge; a TFT on the glass substrate and electrically coupled to the electrode; and a control circuit comprising: a multiplexer configured to turn on or turn off the TFT; and a drive source configured to provide a drive signal for charging the electrode through the TFT. An amplitude of the drive signal corresponds to an amount of charge, and the amount of charge generates an electrostatic force for actuating the hinge and a portion of the membrane mirror mechanically coupled to the hinge. In some embodiments, the MEMS devices comprise a charge transfer circuit for providing the amount of charge.

Embodiments of the present disclosure relate to MEMS mirror systems with slow light beam deflection. A light beam deflection system is configured to transmit a light beam with a time-varying output deflection angle. The system includes a first resonant structure configured to oscillate about a first rotational axis with a first resonant frequency, a second resonant structure configured to oscillate about a second rotational axis with a second resonant frequency, wherein the first rotational axis is parallel to the second rotational axis, and the first resonant frequency and the second resonant frequency are different and define a predetermined frequency difference, and a drive circuit configured to generate a first drive signal to drive the first resonant structure while additionally generating a second drive signal to drive the second resonant structure, such that the output deflection angle of the light beam oscillates according to a beat pattern of a beat wave, extreme values of the beat wave being modulated and defined by a periodic envelope.

This application discloses a MEMS micromirror and its manufacturing method. The micromirror includes a substrate, a mirror surface, a drive comb pair, and an isolation component. A cavity is formed on the substrate, and the two ends of the mirror surface are fixed to the substrate by a support beam assembly arranged along the cross-sectional direction of the cavity. The mirror surface deflects around the support beam assembly under the drive of the drive comb pair. The surface of the drive comb pair is uniformly covered with an insulating layer deposited by low-temperature IBD ion beam. The isolation component includes a protrusion array disposed in the cavity. The protrusion array includes at least two protrusions arranged in a regular pattern. The protrusions support the mirror surface when it deflects to its lowest point and block the airflow caused by the mirror surface deflection. This can prevent contact discharge between the fixed and moving comb teeth when the micromirror is working, improve the service life and reliability of the product, effectively block the small airflow generated when the micromirror vibrates during operation, increase the wind resistance of the mirror surface, and significantly improve the stability of the micromirror.

The invention discloses an automatic splicing device and method for a large-diameter film reflecting mirror surface. The device comprises a rotating device, a vacuum adsorption device and an automatic pasting device. The mold is controlled to rotate according to a specific angle, the membrane in the membrane box is transferred and fixed to the mold through vacuum adsorption of the membrane, the pasting actuator is controlled through the six-axis mechanical arm, the suture joint of the two membranes is positioned through the visual module, and pasting is conducted along sutures from top to bottom. The two adjacent membranes adsorbed on the mold are automatically spliced together by using an adhesive tape along a sewing line, and the steps are repeated until the splicing work of the whole film mirror surface is completed, so that automatic splicing of the film mirror surface is realized, personal errors caused by manual splicing are avoided, the problem of insufficient efficiency of manual splicing is solved, and the production efficiency of the film mirror surface is improved. The surface shape precision and the film reflection mirror surface process efficiency are greatly improved, and a feasible measure can be provided by the method under the requirement of further improving the aperture of the film reflection mirror surface.

The utility model discloses a mirror structure capable of being seamlessly spliced. The mirror structure comprises a multi-surface film mirror, a fixing piece and a magnetic positioning piece, wherein the fixing piece is locked on a wall surface through a bolt, the film mirror is inserted into the fixing piece from the side edge of the fixing piece through the magnetic positioning piece and is adsorbed on the inner side surface of the front buckle plate through the positioning magnetic block, and the connecting rod is inserted into the through hole. According to the utility model, seamless splicing of a plurality of film mirrors in horizontal and vertical directions can be realized, and position adjustment of the film mirrors can be realized without disassembly.