WO2016008162A1 - Light brush therapeutic apparatus - Google Patents

Abstract

A light brush therapeutic apparatus, comprising sequentially disposed blue optical filters (100), a polarizer (200), a controllable optical rotation element (300), an eyepiece (400), and a control device (500) connected to the controllable optical rotation element (300); incident light enters through the blue optical filters (100) to obtain polarized light via the polarizer (200), then passes through the controllable optical rotation element (300); the controllable optical rotation element (300) controls the polarized light to generate a deflection via a periodic control signal output by the control device (500); and the light is then emitted through the eyepiece (400), and the polarization direction of the emitted polarized light can rotate or can oscillate within a set angle range under the action of the control signal. The light brush therapeutic apparatus has a simple structure, is low in cost, makes little noise, has a low failure rate and a high control precision, and is light and easy to handle.

Description

 Description

 Light brush treatment instrument

Technical field

 [0001] The present invention relates to the field of optics, and more particularly to a phototherapy apparatus for ophthalmologic amblyopia treatment.

Background technique

 [0002] The physiological principle of a light brush treatment apparatus is based on an instantaneous Hedinger's brush effect. The instantaneous Hedinger brush effect means that when a person's eye looks at the blue glare through a rotating polarizer, an image similar to a high-speed rotating propeller can be continuously seen near the center of the eye's gaze direction. The instantaneous Haiding's brush effect, we call it the light brush effect. The light brush effect only appears on the fovea of the macula because the fovea is the most sensitive area of eye vision. The patient looks at a brush-like or propeller image from the eyepiece of the light brush treatment device. This effect occurs only in the most sensitive areas of the macular area of the retina. By activating the brush to activate the pyramidal cells of the macula, the paracentral gaze is gradually moved to the center. Concave, thereby improving vision and achieving healing goals. The therapeutic instrument made according to this principle is a light brush treatment instrument. Light brush treatment is suitable for the treatment of central gaze amblyopia around the eyes, as well as for the treatment of abnormal eye retina.

 [0003] The light brush effect in a conventional light brush treatment apparatus is achieved by using a mechanical mechanism to rotate a blue transparent wafer with a polarizing plate placed behind a white light source. Such a light brush treatment device often generates relatively large noise due to the use of a motor. At the same time, due to the use of a moving mechanism, the structure is very complicated, cumbersome, and the manufacturing cost is high, and the accuracy of the imaging control of the instrument is poor, and the failure rate of the instrument is relatively high.

 [0004] Therefore, it is necessary to provide a light brush treatment apparatus which is simple in structure, low in cost, high in control precision, low in failure rate, low in noise, and light and flexible.

Summary of the invention

 [0005] It is an object of the present invention to provide a light brush treatment apparatus which is simple in structure, low in noise, and light and flexible.

[0006] In order to achieve the object of the present invention, the following technical solutions are provided:

The invention provides a light brush therapeutic apparatus, which comprises a blue filter arranged in sequence, a polarizing plate, a controllable optical element, an eyepiece, and a control device connected to the controllable optical element, wherein the incident light is incident by the blue filter. Obtaining polarized light through the polarizing plate, and then controlling the polarized light to generate deflection according to a periodic control signal outputted by the control device via the controllable optical rotating element, and then outputting the polarized light from the eyepiece, and the polarization direction of the output polarized light is in the The control signal can be rotated or swung within a set angle range.

[0007] The conventional light brush therapeutic apparatus of the present invention has a simpler structure and a lighter and more flexible mechanical structure than the prior art, which uses a mechanical mechanism to rotate the polarizing plate to realize optical rotation. The optically-rotating element controls and deflects the polarization direction of the polarized light outputted by the polarizing plate, and is an ingenious use of the optical rotation phenomenon of the polarized light to break Description

The traditional thinking orientation, creative thinking and outstanding substantive features, and avoids the disadvantages of the traditional mechanical structure, such as cumbersome, noisy, high failure rate, etc. The light brush treatment instrument of the invention has the advantages of simple structure, low cost, low noise, light and flexible, The failure rate is low, and the control signal of the control device is relatively easy to be flexibly regulated by the controllable optical rotatory element, and the control precision is high. Therefore, the present invention has significant progress.

[0008] Preferably, the polarization direction of the polarizing plate can be predetermined as needed.

 [0009] Preferably, the controllable optical rotatory element is a longitudinal electro-optical effect rotatory element, and the longitudinal electro-optical effect rotatory element is provided with a transparent electrode before and after, and the control device is a control circuit, and the control circuit respectively transmits the light through the control signal line The electrodes are connected and output a periodic control signal, which is a control voltage signal. When a longitudinal electro-optic effect optical rotatory element is used, the voltage applied between the front and rear transparent electrodes of the longitudinal electro-optical effect rotatory element is controlled, and the rotation angle of the output polarized light can be changed by changing the control voltage, thereby controlling the polarization direction of the polarized light to rotate or swing.

[0010] Preferably, the controllable optical rotatory element is a lateral electro-optical effect rotatory element, and the control device is a control circuit, and the control circuit is respectively connected to the two-layer plates of the lateral electro-optical effect rotatory element through a control signal line, and outputs a period The control signal is a control voltage signal.

 [0011] Preferably, the controllable optical rotatory element is a magnetic rotatory element, and the control device is a control circuit and a coil connected to the control circuit, wherein the magneto-optical element is disposed in a coil magnetic field, and the control circuit respectively passes through the control signal line The coil generating the magnetic field is connected at both ends, and outputs a periodic control signal, which is a control current signal.

 [0012] Preferably, the polarization direction of the output polarized light is rotatable under the action of the control signal.

 [0013] Preferably, the waveform of the control signal for controlling the polarization of the polarization of the output polarization is a sawtooth wave, and the difference between the minimum and maximum values of the sawtooth wave is an integer multiple of 180 degrees.

 [0014] Preferably, the polarization direction of the output polarized light can be oscillated within a set angle range under the action of the control signal.

 [0015] Preferably, the control signal waveform for controlling the output polarization direction of the polarized light is a continuously varying waveform such as a triangular wave or a sine wave. Preferably, the polarization direction of the outgoing light corresponding to the median value of the signal minimum value and the maximum value of each period of the control signal waveform is a horizontal direction. Preferably, the difference in optical rotation angle corresponding to the minimum value and the maximum value of each period of the period is less than or equal to 180 degrees as needed.

 [0016] Preferably, the rotational speed of the output polarization direction of the polarized light changes dynamically as the time-varying characteristic of the control signal changes dynamically. For embodiments employing a longitudinal electro-optic effect optical element or a lateral electro-optic effect optical element, the optical rotation speed can be varied by controlling the time-varying characteristic of the voltage; for embodiments employing a magneto-optical element, the rotational speed of the output polarization direction can be The control current changes dynamically.

[0017] Preferably, the swing speed of the output polarization direction of the polarized light changes dynamically as the time-varying characteristic of the control signal changes dynamically. Instruction manual

For an embodiment employing a longitudinal electro-optic effect optical element or a lateral electro-optic effect optical element, the swing speed of the polarization direction of the output polarized light can be changed by controlling the time-varying characteristic of the voltage; for the embodiment using the magneto-optical element, the output polarized light is polarized The direction of the swing speed can vary with the control current frequency.

 [0018] Preferably, the amplitude of the swing of the polarization direction of the output polarized light changes dynamically as the amplitude difference of the control signal changes dynamically. For embodiments employing a longitudinal electro-optic effect optical element or a lateral electro-optic effect optical element, the amplitude of the amplitude of the output polarization polarization can vary as a function of the magnitude of the control voltage amplitude; for embodiments employing a magneto-optical element, the output polarization The amplitude of the swing of the light polarization direction may vary as the magnitude of the control current amplitude changes.

 [0019] Preferably, the lateral electro-optic effect element or the longitudinal electro-optic effect optical element can adopt a liquid crystal cell, a lithium niobate electro-controlled wave plate, a potassium dihydrogen phosphate (KDP) Pockels cell, and a potassium dipotassium phosphate (DKDP). Kers box and so on.

[0020] Preferably, the magneto-optical element may be a paramagnetic or anti-magnetic optical glass with a high-field constant.

[0021] Compared to the prior art, the present invention has the following advantages:

The light brush therapeutic apparatus of the invention is simpler, lighter and more flexible, less costly, lighter and lighter, has a lower failure rate, and has higher regulation precision than the prior art.

DRAWINGS

 1 is a schematic view showing the arrangement of optical path components of the light brush treatment apparatus of the present invention;

2 is a schematic structural view of a first embodiment of a light brush treatment apparatus according to the present invention;

3 is a schematic structural view of a second embodiment of a light brush treatment apparatus according to the present invention;

4 is a schematic structural view of a third embodiment of a light brush treatment apparatus according to the present invention;

5 is a schematic diagram of a periodic control signal of a sawtooth wave whose oblique side is linearly rising in the present invention;

Fig. 6 is a schematic diagram of the periodic control signal of the sawtooth wave of the curve in which the ascending edge is fast, then slow and then accelerated; FIG. 7 is a saw with a curve in which the rising process is slow first and then slowed down again. Schematic diagram of the periodic control signal of the tooth wave; Fig. 8 is a schematic diagram of the periodic control signal of the sawtooth wave whose oblique side is linearly falling;

Fig. 9 is a schematic diagram of the periodic control signal of the sawtooth wave of the curve in which the hypotenuse is first fast, then slow and then accelerated; Fig. 10 is a saw with a hypoglytic curve which is slowed down and then slowed down again. Schematic diagram of the periodic control signal of the tooth wave; Fig. 11 is a schematic diagram of the periodic control signal of the triangular wave whose oblique side is a straight line;

Figure 12 is a schematic diagram of periodic control signals of curved waves parallel to the time axis of the peaks and troughs;

Figure 13 is a schematic diagram of the periodic control signals for the curved waves whose peaks and troughs are apex.

detailed description

[0023] Referring to FIG. 1, the light brush treatment apparatus of the present invention comprises a blue filter 100, a polarizing plate 200, a controllable optical element 300, an eyepiece 400, and a control device 500 connected to the controllable optical element. Light by blue filter 100 Instruction manual

Upon incident, polarized light is obtained via the polarizing plate 200, and then through the controllable optical rotating element 300, the controllable optical rotating element 300 controls the polarized light to be deflected according to the periodic control signal outputted by the control device 500, and then exits from the eyepiece 400, and the output polarized light is output. The polarization direction can be rotated by the control signal or can be swung within a set angle range. The polarization direction of the polarizing plate 200 can be predetermined as needed.

 [0024] Please refer to FIG. 2 , specifically in the first embodiment, the controllable optical rotatory element is a longitudinal electro-optical effect rotatory element 310, and the longitudinal electro-optical effect rotatory element 310 is provided with a transparent electrode (not labeled) before and after. The longitudinal electro-optic effect optical rotatory element 310 may be a TN liquid crystal cell with a front and back ITO-plated electrode, or the vertical electro-optic effect optical rotatory element 310 may be a lithium niobate electro-controlled wave plate, a potassium dihydrogen phosphate (KDP) Pockels cell, and phosphoric acid. Diterpenoid potassium (DKDP) Pockels box and so on. The preferred embodiment of the longitudinal electro-optic effect optical rotator is a liquid crystal cell, which is low in cost and good in application. The polarization direction of the polarizing plate can be selected as the horizontal direction.

 [0025] The control device is a control circuit 510, which is respectively connected to the transparent electrode through a control signal line 600, and outputs a periodic control signal, the control signal is a control voltage signal, and the control is applied to the longitudinal electro-optic light. The voltage between the light-transmitting electrodes before and after the effect of the optical rotating element can be changed by changing the control voltage to change the optical rotation angle of the output polarized light, thereby controlling the polarization direction of the polarized light to rotate or oscillate.

 [0026] If the polarization direction of the blue polarized light to be output is rotated, the waveform of the control voltage applied between the front and rear transparent electrodes of the longitudinal electro-optic effect optical rotating element 310 may be a sawing tooth as shown in one of FIGS. 5-10. wave. The sawtooth wave voltage The difference between the minimum and maximum values of each cycle is 180 degrees. The corresponding optical rotation direction in Figure 5-7 is opposite to the optical rotation direction in Figure 8-Figure 10. The optical rotation speed can be changed according to the control voltage frequency. The optical rotation speed corresponding to different voltage waveforms can be uniform speed or a certain regular shift. If the liquid crystal cell is used as the longitudinal electro-optical effect optical rotating element, the waveform correspondence is related to the characteristics of the liquid crystal cell. After the liquid crystal cell and the optical path are selected, the waveform corresponding to the uniform velocity and the waveform corresponding to other variation laws can be determined.

 [0027] If the polarization direction of the blue polarized light to be output is required to be oscillated, the waveform of the control voltage applied between the front and rear transparent electrodes of the longitudinal electro-optic effect optical rotating element 310 is a triangular wave or sine which is changed as shown in one of FIGS. 11 to 13 Waves and other continuously varying waveforms. The polarization direction of the outgoing light corresponding to the median value of the maximum value and the maximum value of each period is the horizontal direction, and the difference in the optical rotation angle corresponding to the minimum value and the maximum value of each period is less than or equal to 180 degrees as needed. The swing speed of the output polarization direction of the blue polarized light can vary with the frequency of the control voltage. The amplitude of the swing of the output polarization direction of the blue polarized light may vary as the magnitude of the control voltage amplitude changes.

[0028]

Referring to FIG. 3, in the second embodiment, the controllable optical rotator is a lateral electro-optic effect rotator 320, and the control device is a control circuit 520. The electrodes (not labeled) on the two sides of the lateral electro-optical rotator 320 are respectively connected to the control circuit. 520 Description

In the specific embodiment, the longitudinal electro-optic effect optical element 310 can adopt a liquid crystal cell, a lithium niobate electro-controlled wave plate, a potassium dihydrogen phosphate (KDP) Pockels cell, and a potassium dipotassium phosphate (DKDP). Kers box and so on. In Fig. 3, the lateral electro-optic effect optical rotator is a lithium niobate electrically controlled 1/2 wave plate with electrodes on both sides. The polarization direction of the polarizing plate can be selected as the horizontal direction.

 [0029] The control circuit 520 is respectively connected to the electrode plates on both sides of the lateral electro-optic effect optical rotating element 320 through the control signal line 600, and outputs a periodic control voltage signal, which controls the voltage applied between the electrodes of the lateral electro-optic effect optical rotating element. The rotation angle of the output polarized light can be changed by changing the control voltage, thereby controlling the polarization direction of the polarized light to rotate or oscillate.

 [0030] If the polarization direction of the blue polarized light to be output is rotated, the waveform of the control voltage applied between the electrodes of the lateral electro-optic effect optical element may be a sawtooth wave as shown in one of FIGS. The difference between the minimum and maximum values of the sawtooth voltage for each period is 180 degrees. The direction of rotation corresponding to Figure 5-7 is opposite to the direction of rotation for Figure 8-10. The optical rotation speed can be changed according to the control voltage frequency. The optical rotation speed corresponding to different voltage waveforms can be uniform speed or a certain regular shift. If lithium niobate electronically controlled 1/2 wave plate is used as the transverse electro-optical effect optical rotating element, the waveform corresponds to The relationship is related to the characteristics of the lithium niobate electronically controlled 1/2 wave plate with electrodes on both sides. The structure and the optical path of the lithium niobate electronically controlled 1/2 wave plate with electrodes on both sides are fixed, and the waveform corresponding to the uniform velocity corresponds to other variations. The waveform can be determined.

 [0031] If the polarization direction of the blue polarized light to be output is required to be oscillated, the waveform of the control voltage applied between the electrodes of the lateral electro-optical effect optical element is a change law such as a triangular wave or a sine wave as shown in one of FIGS. 11 to 13 Waveform. The polarization direction of the outgoing light corresponding to the median value of each period and the median value of the maximum value is the horizontal direction, and the difference in the optical angle between the minimum value and the maximum value of each period is less than or equal to 180 degrees as needed. The swing speed of the output polarization direction of the blue polarized light may vary with the frequency of the control voltage. The amplitude of the swing of the output polarization direction of the blue polarized light may vary as the amplitude of the control voltage varies.

 Referring to FIG. 4, in the third embodiment, the controllable optical rotatory element is a magnetic rotatory element 330. The control device is a control circuit 530 and a coil 540. The control circuit 530 respectively passes the control signal line 600. Connected to both ends of a coil 540 that generates a magnetic field, the magneto-optical element 330 is disposed in a magnetic field of the coil 540, and the control signal generated by the control circuit 530 is a current applied to the coil 540 that generates the magnetic field. In a specific embodiment, the magneto-optical element 330 may be a paramagnetic or inverse-magnetic glass or the like having a high-field constant. The polarization direction of the polarizing plate can be selected to be the horizontal direction.

[0033] If the polarization direction of the blue polarized light to be output is rotated, the waveform of the control current applied to the coil 540 may be a sawtooth wave as shown in one of FIGS. 5 to 10, and the sawtooth wave current is each. The difference in the optical rotation angle corresponding to the minimum value and the maximum value of the period is 180 degrees, and the optical rotation direction corresponding to FIG. 5 to FIG. 7 is opposite to the optical rotation direction corresponding to FIG. 8 to FIG. Optical rotation Description

The speed can vary with the control current frequency. The optical speed corresponding to different current waveforms can be a uniform speed or a certain regular shift. The waveform correspondence is related to the characteristics of the magneto-optical element 330 and the coil 540. The magneto-optical element 330 After the structure and the optical path of the coil 540 are fixed, the waveform corresponding to the uniform velocity and the waveform corresponding to other variation laws can be determined.

 [0034] If the polarization direction of the blue polarized light to be output is required to swing, the waveform of the control current applied to the coil 540 is a continuously varying waveform such as a triangular wave or a sine wave as shown in one of FIGS. 11 to 13 . The polarization direction of the outgoing light corresponding to the median value of the periodic current minimum value and the maximum value is the horizontal direction, and the optical rotation angle difference corresponding to the current minimum value and the maximum value of each cycle is less than or equal to 180 degrees as needed. The swing speed of the output polarization direction of the blue polarized light may vary with the control current frequency, and the amplitude of the swing of the output polarization direction of the blue polarized light may vary as the control current amplitude difference changes.

 [0035] The waveform of the above control signal is obtained through testing and experimental research, and the physical parameters of the actual device must be actually tested, that is, the relationship between the polarization angle of the polarized light and the control signal is tested, thereby designing a specific control waveform.

The above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and any equivalent transformation based on the technical solutions of the present invention is within the scope of the present invention.

Claims

Claim  A light brush therapeutic apparatus, comprising: a blue filter, a polarizing plate, a controllable optical element, an eyepiece, and a control device connected to the controllable optical element, which are sequentially arranged, and the incident light is filtered by blue The light sheet is incident, polarized light is obtained through the polarizing plate, and then controlled by the rotatory optical element, the illuminating element controls the polarization to be deflected according to the periodic control signal outputted by the control device, and then exits from the eyepiece, and the polarization direction of the output polarized light is output. It can be rotated or swung within a set angle range by the control signal.  2. The light brush treatment apparatus according to claim 1, wherein the controllable optical rotatory element is a longitudinal electro-optical effect rotatory element, and the control device is a control circuit, and the longitudinal electro-optical effect rotatory element is provided with a transparent electrode before and after. The control circuit is respectively connected to the transparent electrode through a control signal line, and outputs a periodic control signal, which is a control voltage signal.  3. The light brush treatment apparatus according to claim 1, wherein the controllable optical rotatory element is a lateral electro-optical effect rotatory element, and the control device is a control circuit, and the control circuit respectively controls the signal line and the lateral electro-optic effect. The plates on both sides of the optical rotating element are connected, and a periodic control signal is output, and the control signal is a control voltage signal.  4. The light brush treatment apparatus according to claim 1, wherein the controllable optical rotatory element is a magnetic rotatory element, the control device is a control circuit and a coil connected to the control circuit, and the magneto-optical element is disposed on the coil In the magnetic field, the control circuit is respectively connected to both ends of the coil generating the magnetic field through the control signal line, and outputs a periodic control signal, which is a control current signal.  The light brush treatment apparatus according to any one of claims 1 to 4, wherein the polarization direction of the output polarized light is rotatable under the action of the control signal, and the control signal for controlling the polarization direction of the output polarization is rotated. The waveform is a sawtooth wave, and the difference between the minimum and maximum values of the sawtooth wave is an integral multiple of 180 degrees.  The light brush treatment apparatus according to any one of claims 1 to 4, wherein the polarization direction of the output polarized light is oscillated within a set angle range by the control signal, and the output polarized light is controlled. The control signal waveform in which the polarization direction is swung is a continuously varying waveform such as a triangular wave or a sine wave.  The light brush treatment apparatus according to any one of claims 1 to 4, wherein the rotational speed or the swing speed of the output polarization direction of the polarized light changes dynamically as the time-varying characteristic of the control signal changes.  The light brush treatment apparatus according to any one of claims 1 to 4, characterized in that the amplitude of the swing of the polarization direction of the output polarized light changes dynamically as the amplitude difference of the control signal changes dynamically.  The phototherapy apparatus according to claim 2 or 3, wherein the lateral electro-optic effect element or the longitudinal electro-optic effect optical element uses a liquid crystal cell, a lithium niobate electro-controlled wave plate, and potassium dihydrogen phosphate (KDP). The Kers box and the potassium dipotassium phosphate (DKDP) Pockels box are either of them.  10. The light brush treatment apparatus according to claim 4, wherein the magneto-optical element is a paramagnetic or anti-magnetic optical glass having a high-field constant.