CN116125691A - Quick zooming method and system of zoom lens, electronic equipment and storage medium - Google Patents
Quick zooming method and system of zoom lens, electronic equipment and storage medium Download PDFInfo
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- CN116125691A CN116125691A CN202310347945.XA CN202310347945A CN116125691A CN 116125691 A CN116125691 A CN 116125691A CN 202310347945 A CN202310347945 A CN 202310347945A CN 116125691 A CN116125691 A CN 116125691A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1313—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells specially adapted for a particular application
Abstract
The invention provides a quick zooming method, a system, electronic equipment and a storage medium of a zoom lens, belonging to the technical field of liquid crystal zoom lenses; the method comprises the steps of obtaining a current focal length before zooming and a target focal length after zooming of the zoom lens, and determining overvoltage voltages required to be applied to all channels of the zoom lens; obtaining target overvoltage time corresponding to each channel by adopting a polynomial fitting algorithm based on the overvoltage voltage; respectively applying preset overvoltage voltage exceeding target overvoltage time to each channel according to the relation between the current focal length and the target focal length; when the duration of the preset overvoltage voltage applied by each channel reaches the target overvoltage time, triggering a timer to start so that each channel is switched to the real-time voltage of each channel after the zoom lens zooms. According to the method, the fixed overvoltage voltage is applied to each channel, different overvoltage time is set, and the designated overvoltage driving time is given to each channel in a timing mode, so that the liquid crystal molecules can quickly reach the expected torsion angle.
Description
Technical Field
The invention belongs to the technical field of liquid crystal zoom lenses, and particularly relates to a quick zooming method and system of a zoom lens, electronic equipment and a storage medium.
Background
Zoom lenses are widely used in fields such as photography, vision correction, machine vision, and three-dimensional display. Two main categories of zoom lenses are classified according to the zoom principle: the first type realizes zooming by changing geometric parameters such as curvature radius of the lens; the second type realizes zooming by changing the refractive index of the lens material, and mainly includes liquid crystal zoom lenses and the like. Compared with the first type of zoom lens, the second type of zoom lens does not need mechanical moving devices and components such as a micro mechanical pump, a micro servo motor and the like, is insensitive to interference of external environment, has the advantages of simple structure, stable performance and the like, and is considered to be one of the most promising zoom lens technologies.
Based on the liquid crystal zoom lens, the birefringence performance of the liquid crystal material is utilized, and the orientation of liquid crystal molecules is changed through an applied voltage, so that the refractive index of the liquid crystal material is changed, and finally, zooming is realized. The liquid crystal zoom lens is a common zoom lens in a zoom optical system, and the rotation speed and the magnitude of the twist angle are determined by the magnitude of the electrode voltage applied to the liquid crystal molecules. In the prior art, the method for improving the rotation speed and the response speed of the torsion angle of the liquid crystal molecules generally adopts an overvoltage driving technology, the overvoltage time applied by the current overvoltage driving technology generally adopts fixed one frame (frame) time, and a voltage higher than the target voltage (namely, overvoltage voltage) is applied to each channel; the response time of the liquid crystal molecules under each applied voltage is inconsistent, so that the response time of part of channels is longer than one frame, and the liquid crystal molecules do not reach the expected torsion angle within one frame time, thereby affecting the zooming effect of the zooming liquid crystal lens.
Therefore, how to make the liquid crystal molecules of the liquid crystal zoom lens accurately reach the expected angle under the condition of applying the over-voltage driving and to make the time taken to reach the expected angle shortest, so as to achieve the precise and rapid zooming effect, is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In order to solve the technical problems, the invention provides a quick zooming method, a system, electronic equipment and a storage medium of a zoom lens, which can enable liquid crystal molecules of the zoom lens to quickly reach an expected torsion angle, thereby realizing a quick response zooming effect of the zoom lens.
In a first aspect, the invention provides a fast zoom method of a zoom lens, comprising:
acquiring a current focal length before zooming of the zoom lens and a target focal length after zooming;
determining overvoltage voltages required to be applied to all channels of the zoom lens according to the current focal length and the target focal length;
obtaining target overvoltage time corresponding to each channel by adopting a polynomial fitting algorithm based on the overvoltage voltage, wherein the target overvoltage time refers to the time spent by each channel from real-time voltage before zooming to real-time voltage after zooming;
Applying a preset overvoltage voltage exceeding the target overvoltage time to each channel according to the relation between the current focal length and the target focal length;
when the duration of the preset overvoltage voltage applied by each channel reaches the target overvoltage time, triggering a timer to start so that each channel is switched to the real-time voltage of each channel after the zoom lens zooms, and completing the zooming of the zoom lens.
Preferably, the step of obtaining the current focal length before zooming and the target focal length after zooming of the zoom lens specifically includes:
acquiring focal lengths corresponding to all zoom states according to the optical parameters of the zoom lens;
forming a zoom focal length table based on the zoom states and the focal lengths corresponding to the zoom states;
and inquiring the current focal length of the state of the zoom lens before zooming and the target focal length of the state of the zoom lens after zooming according to the zoom focal length table.
Preferably, the step of determining the overvoltage voltage required to be applied to each channel of the zoom lens according to the current focal length and the target focal length specifically includes:
respectively calculating real-time voltages of all channels of the zoom lens based on the current focal length and the target focal length;
Calculating the applied voltage to be applied to each channel after zooming based on the two real-time voltages;
and determining the overvoltage voltage required to be applied to each channel by adopting an overvoltage mechanism according to the applied voltage.
Preferably, the step of obtaining the target overvoltage time corresponding to each channel based on the overvoltage voltage by using a polynomial fitting algorithm, where the target overvoltage time refers to a time period consumed by the real-time voltage before zooming to reach the real-time voltage after zooming for each channel specifically includes:
applying overvoltage voltages which are needed to be applied correspondingly to the channels respectively;
obtaining the time length spent by the real-time voltage before zooming to reach the real-time voltage after zooming of each channel through a polynomial fitting algorithm based on the overvoltage voltage;
the duration is defined as the target overpressure time required for zooming of the channels.
Preferably, the step of obtaining the polynomial fitting algorithm specifically includes:
applying overvoltage voltages which are needed to be applied correspondingly to the channels respectively;
acquiring real-time length consumed by the real-time voltage before zooming to reach the real-time voltage after zooming of each channel in real time through a timer;
Calculating the budget time spent by the real-time voltage before zooming to reach the real-time voltage after zooming of each channel through a prefabricated fitting algorithm according to the overvoltage voltage;
comparing and fitting based on the real-time duration and the budget duration to obtain an experience coefficient;
and applying the empirical coefficients to the prefabricated fitting algorithm to correct the empirical coefficients to obtain the polynomial fitting algorithm.
Preferably, the step of applying a predetermined over-voltage exceeding the target over-voltage time to each channel according to the relationship between the current focal length and the target focal length specifically includes:
judging whether the current focal length is smaller than the target focal length or not;
if not, respectively applying a preset overvoltage voltage exceeding the target overvoltage time to each channel, wherein the preset overvoltage voltage is larger than the maximum value in the real-time voltage of each channel after the zoom lens zooms;
if yes, respectively applying preset overvoltage voltage exceeding the target overvoltage time to each channel, wherein the preset overvoltage voltage is zero.
Preferably, when the duration of the predetermined over-voltage applied by each channel reaches the target over-voltage time, triggering a timer to start so that each channel is switched to the real-time voltage of each channel after zooming of the zoom lens, so as to complete zooming of the zoom lens specifically includes:
Starting a timer to count the overvoltage time for applying the preset overvoltage voltage when the preset overvoltage voltage is applied to each channel;
triggering a timer start signal when the overpressure time reaches the target overpressure time;
when the voltage switcher receives the timer starting signal, the preset overvoltage voltage applied by each channel is switched to the real-time voltage of each channel after zooming of the lens, so that zooming of the zoom lens is completed.
In a second aspect, the present invention provides a fast zoom system for a zoom lens, comprising:
the acquisition module is used for acquiring the current focal length before zooming and the target focal length after zooming of the zoom lens;
the determining module is used for determining overvoltage voltages required to be applied to all channels of the zoom lens according to the current focal length and the target focal length;
the fitting module is used for obtaining target overvoltage time corresponding to each channel by adopting a polynomial fitting algorithm based on the overvoltage voltage, wherein the target overvoltage time refers to the time spent by the real-time voltage before zooming of each channel to reach the real-time voltage after zooming;
the application module is used for respectively applying preset overvoltage voltage exceeding the target overvoltage time to each channel according to the relation between the current focal length and the target focal length;
And the switching module is used for triggering a timer to start when the duration of the preset overvoltage voltage applied by each channel reaches the target overvoltage time, so that each channel is switched to the real-time voltage of each channel after the zoom lens zooms, and the zooming of the zoom lens is completed.
Preferably, the acquiring module includes:
the first calculation unit is used for obtaining focal lengths corresponding to all zoom states according to the optical parameters of the zoom lens;
a tabulation unit, configured to form a zoom focal length table based on the zoom states and the focal lengths corresponding to the zoom states;
and the inquiring unit is used for inquiring the current focal length of the state of the zoom lens before zooming and the target focal length of the state of the zoom lens after zooming according to the zoom focal length table.
Preferably, the determining module includes:
the second calculation unit is used for calculating the real-time voltage of each channel of the zoom lens respectively based on the current focal length and the target focal length;
a third calculation unit for calculating an applied voltage to be applied to each channel after zooming based on the two real-time voltages;
and the determining unit is used for determining the overvoltage voltage required to be applied to each channel by adopting an overvoltage mechanism according to the applied voltage.
Preferably, the fitting module includes:
the first applying unit is used for applying overvoltage voltages which are needed to be applied correspondingly to the channels respectively;
the fitting unit is used for obtaining the time spent by the real-time voltage before zooming to reach the real-time voltage after zooming of each channel through a polynomial fitting algorithm based on the overvoltage voltage;
and the definition unit is used for defining the duration as the target overpressure time required by zooming of each channel.
Preferably, the applying module includes:
a judging unit, configured to judge whether the current focal length is smaller than the target focal length;
the second applying unit is used for respectively applying preset overvoltage voltages exceeding the target overvoltage time to the channels if the current focal length is larger than the target focal length, wherein the preset overvoltage voltages are larger than the maximum value of the real-time voltages of the channels after the zoom lens zooms;
and a third applying unit for applying a predetermined overvoltage voltage exceeding the target overvoltage time to each channel if the current focal length is smaller than the target focal length, wherein the predetermined overvoltage voltage is zero.
Preferably, the switching module includes:
The timing unit is used for starting a timer to time the overvoltage time for applying the preset overvoltage voltage when the preset overvoltage voltage is applied to each channel;
the timing unit is used for triggering a timer starting signal when the overvoltage time reaches the target overvoltage time;
and the switching unit is used for switching the preset overvoltage voltage applied by each channel to the real-time voltage of each channel after zooming of the lens when the voltage switcher receives the timer starting signal so as to complete zooming of the zoom lens.
In a third aspect, an embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the fast zooming method of the zoom lens according to the first aspect when executing the computer program.
In a fourth aspect, embodiments of the present application provide a storage medium having stored thereon a computer program which, when executed by a processor, enables a quick zoom of a zoom lens according to the first aspect.
Compared with the prior art, the invention has the beneficial effects that: the liquid crystal molecules of the zoom lens can quickly reach the expected torsion angle in the zooming process by applying fixed overvoltage voltage to each channel and setting different overvoltage time and giving specified overvoltage driving time to the corresponding channel of the zoom lens in a timing mode, so that the time required by the torsion angle of the liquid crystal molecules is shortened, and the quick response zooming effect of the zoom lens is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a waveform diagram of an acceleration zoom drive of a prior art over-voltage drive technique;
fig. 2 is a schematic flow chart of a fast zooming method provided in embodiment 1 of the present invention;
fig. 3 is a schematic diagram showing a voltage change of a certain channel of a liquid crystal lens length Jiao Bianduan focus provided in embodiment 1 of the present invention;
fig. 4 is a block diagram of a fast zoom system of a zoom lens according to the method of embodiment 1 according to embodiment 2 of the present invention;
fig. 5 is a schematic diagram of voltage change of a certain channel of the liquid crystal lens with short-focal-length-variable focal length according to embodiment 3 of the present invention;
fig. 6 is a block diagram of a fast zoom system of a zoom lens according to the method of embodiment 3, provided in embodiment 4 of the present invention;
fig. 7 is a schematic hardware structure of an electronic device according to embodiment 5 of the present invention.
Reference numerals illustrate:
the system comprises a 10-acquisition module, an 11-first calculation unit, a 12-tabulation unit and a 13-query unit;
a 20-determining module, a 21-second calculating unit, a 22-third calculating unit, a 23-determining unit;
30-fitting module, 31-first applying unit, 32-fitting unit, 33-defining unit;
40-application module, 41-judgment unit, 42-second application unit, 43-third application unit;
a 50-switching module, a 51-timing unit, a 52-timing unit, a 53-switching unit;
60-bus, 61-processor, 62-memory, 63-communication interface.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.
In order to increase the zoom speed, an over-voltage driving technique is generally adopted, and the technique specifically refers to applying a high-voltage pulse to the second sub-electrode of the first electrode layer, as shown in fig. 1, where (a) in fig. 1 is a waveform of a driving voltage V applied to the first sub-electrode of the first electrode layer over time t, and (b) in fig. 1 is a waveform of a driving voltage V applied to the second sub-electrode of the first electrode layer over time t 1 The liquid crystal lens in the period is in a first zooming state, the liquid crystal lens in the t' period is in an acceleration driving state, and t 2 The period liquid crystal lens is in a second zoom state. In the process of changing the liquid crystal lens from the first zooming state to the second zooming state, the driving voltage applied to the first electrode layer is always unchanged, and the driving voltage V of the first sub-electrode is maintained 1 The driving voltage of the second sub-electrode is unchanged from V 2 Switching to V 3 To achieve zooming. The driving voltage at the second sub-electrode is V 2 Change to V 3 Before, a high voltage pulse V ' is applied to the second sub-electrode, the duration of the high voltage pulse V ' is t ', and the driving voltage of the first sub-electrode is still V during t 1 . However, the overpressure applied by existing overpressure driving techniques typically takes a fixed frame time; the application is based on the proposal that the response time of partial channels is longer than one frame because the response time of liquid crystal molecules under each applied voltage is not consistent, so that the liquid crystal molecules do not reach the expected torsion angle in one frame time, thereby affecting the zooming effect of the zooming liquid crystal lens.
Example 1
Specifically, fig. 2 is a schematic flow chart of a fast zooming method of a zoom lens according to the present embodiment.
As shown in fig. 2, the fast zooming method of the zoom lens of the present embodiment includes the steps of:
s101, acquiring a current focal length before zooming and a target focal length after zooming of the zoom lens.
Specifically, zooming is to change a focal length, and a lens capable of changing the focal length is called a zoom lens, and a lens incapable of changing the focal length is called a fixed-focus lens. The zoom lens thus has respective focal lengths according to the zoom states, that is to say one focal length for each zoom state.
Further, the specific steps of step S101 include:
s1011, acquiring focal lengths corresponding to all zoom states according to the optical parameters of the zoom lens;
s1012, forming a zoom focal length table based on the zoom states and the focal lengths corresponding to the zoom states;
s1013, inquiring the current focal length of the state of the zoom lens before zooming and the target focal length of the state after zooming according to the zoom focal length table.
S102, determining overvoltage voltages required to be applied to all channels of the zoom lens according to the current focal length and the target focal length.
Specifically, the current way of driving the liquid crystal molecules of the zoom lens to rotate generally employs an over-voltage driving principle, in which the liquid crystal molecules are rotated by applying a voltage (over-voltage) higher than a target voltage to each channel of the zoom lens. The table information illustrates that the zoom lens can realize a plurality of focal lengths, each channel has a specific voltage under each focal length, and the focal length f1 < f2 < f3 < f4 < … < fn.
Further, the specific steps of step S102 include:
s1021, respectively calculating the real-time voltage of each channel of the zoom lens based on the current focal length and the target focal length.
Specifically, since one zoom state is corresponded to each focal length, which is formed by the rotation of the liquid crystal molecules, the rotation of the liquid crystal molecules requires a corresponding voltage, so that a real-time voltage value required for the zoom lens at this time can be obtained by the focal length.
And S1022, calculating the applied voltage to be applied to each channel after zooming based on the two real-time voltages.
Specifically, the real-time voltage before and after zooming of the liquid crystal lens can be obtained, for example, the voltage applied to the channel before zooming is 2.18V, and the voltage applied to the channel after zooming is 3.51V, so that the voltage applied to the channel before zooming is more than 3.51V, but the voltage applied cannot exceed a certain value, so that damage is avoided.
S1023, determining the overvoltage voltage required to be applied to each channel by adopting an overvoltage mechanism according to the applied voltage.
Specifically, since the over-voltage driving rotates the liquid crystal molecules by applying a voltage (over-voltage) higher than the target voltage to each channel of the zoom lens, the applied over-voltage must be greater than 3.51V.
And S103, obtaining target overvoltage time corresponding to each channel by adopting a polynomial fitting algorithm based on the overvoltage voltage, wherein the target overvoltage time refers to the time spent by the real-time voltage before zooming to reach the real-time voltage after zooming for each channel.
Specifically, the following table is exemplary data of overvoltage time required in the switching process of different focal lengths of the liquid crystal lens of the present embodiment, and the data is obtained by performing actual test and polynomial fitting according to the voltage values of each channel before and after focal length switching.
The step of obtaining the polynomial fitting algorithm specifically comprises the following steps:
step one: applying overvoltage voltages which are needed to be applied correspondingly to the channels respectively;
step two: acquiring the real-time length consumed by the real-time voltage before zooming to reach the real-time voltage after zooming of each channel through an optical measuring instrument system;
step three: calculating the budget time spent by the real-time voltage before zooming to reach the real-time voltage after zooming of each channel through a prefabricated fitting algorithm according to the overvoltage voltage;
step four: comparing and fitting based on the real-time duration and the budget duration to obtain an experience coefficient;
step five: and applying the empirical coefficients to the prefabricated fitting algorithm to correct the empirical coefficients to obtain the polynomial fitting algorithm.
Through the steps, a polynomial fitting algorithm is constructed in an actual and simulated fitting correction mode, the accuracy of the overvoltage time required by the zoom lens is improved, and the aims of improving the zoom effect of the zoom lens and reducing the zoom time are fulfilled.
Further, the specific steps of step S103 include:
s1031, applying overvoltage voltages which are needed to be applied to the channels respectively.
S1032, obtaining the time spent by the real-time voltage before zooming to reach the real-time voltage after zooming of each channel through a polynomial fitting algorithm based on the overvoltage voltage.
Specifically, the polynomial fitting algorithm adopted in this embodiment is specifically as follows:
wherein: t is the time required for zooming; m, n are orders, i=0, 1,2, … …, n; j=0, 1,2, … …, m;K i 、H j fitting coefficients; v (V) 1 Voltage of corresponding channel for target focal length, V 0 The voltage of the corresponding channel for the current focal length. M, n,K i 、H j The method is derived by combining optical test data of the liquid crystal lens with polynomial fitting of overvoltage voltage.
And S1033, defining the duration as target overpressure time required by zooming of each channel.
Specifically, for example, the focal length f3 of the liquid crystal lens is zoomed to a focal length f1, and the focal length f3> f1, that is, the target focal length is smaller than the current focal length, each channel electrode of each liquid crystal lens is driven according to an X voltage overvoltage, and the X voltage is larger than the maximum voltage of all channels. The length of over-voltage drive time required for each channel electrode to zoom focal length f3 to focal length f1 is given in the following table.
It should be noted that, in order to control the overpressure time of each channel corresponding to the zoom of the lens conveniently in the actual driving program, the time reorganizing module is added, so that the compatibility of the overpressure time of each channel can be enhanced. In the embodiment, the overvoltage time of each electrode channel is sequenced according to ascending order in the zooming process, and corresponding electrode channel numbers are associated, so that the module is more convenient for program control of the voltage of each electrode of the lens, and the number of timers of the controller is saved. Because the overvoltage driving time of each channel is related to the voltage before and after zooming of the liquid crystal lens, the overvoltage driving time of each channel may be different, and after passing through the time reorganizing module, the channels are ordered according to ascending order by the overvoltage time, and the channel numbers of the corresponding electrodes are associated, as shown in the following table.
S104, respectively applying preset overvoltage voltage exceeding the target overvoltage time to each channel according to the relation between the current focal length and the target focal length.
Further, the specific steps of step S104 include:
s1041, judging whether the current focal length is smaller than the target focal length;
s1042, if not, respectively applying a preset overvoltage voltage exceeding the target overvoltage time to each channel, wherein the preset overvoltage voltage is larger than the maximum value of the real-time voltages of each channel after zooming of the zoom lens.
According to the above steps, in this embodiment, when the current focal length is greater than the target focal length, it is indicated that the zoom of the liquid crystal lens is in a state of being Jiao Bianduan focus long, as shown in fig. 3, which is a schematic diagram of a channel voltage change of Jiao Bianduan focus long of the liquid crystal lens, and the channel voltage V1 before the zoom is smaller than the channel voltage V2 after the zoom, and the application of the high voltage X to the liquid crystal molecules accelerates the rotation acceleration thereof within the overvoltage time t1 according to the characteristics of the liquid crystal molecules.
And S105, triggering a timer to start so that each channel is switched to the real-time voltage of each channel after the zoom lens zooms when the duration of the preset overvoltage voltage applied by each channel reaches the target overvoltage time, so as to complete the zooming of the zoom lens.
Specifically, the embodiment has a timer module and a voltage control module, where the functions of the timer module are specifically: and after the time reaches the specified overvoltage time of the specified corresponding electrode channel according to the time reorganization module, triggering a timer, and switching to the electrode voltage corresponding to the target focal length, thereby achieving the purpose of accurately controlling the overvoltage time. The specific functions of the voltage control module are as follows: the voltage output of each electrode channel of the liquid crystal lens before and after zooming, the selection of the overvoltage voltage in the zooming process and the corresponding specific electrode channel number of the time for reaching the command overvoltage after the timer module is started are controlled, so that the voltage output of the channel is controlled.
Further, the specific steps of step S105 include:
s1051, starting a timer to count overvoltage time for applying the preset overvoltage voltage when the preset overvoltage voltage is applied to each channel;
s1052, triggering a timer starting signal when the overvoltage time reaches the target overvoltage time;
s1053, when the voltage switcher receives the timer starting signal, the preset overvoltage voltage applied by each channel is switched to the real-time voltage of each channel after the zooming of the lens, so as to complete the zooming of the zoom lens.
In summary, by adopting the above steps, by applying a fixed overvoltage voltage to each channel of the zoom lens and setting different overvoltage times, and by giving an assigned overvoltage driving time to the corresponding channel of the zoom lens in a timing manner, the liquid crystal molecules of the zoom lens can quickly reach the expected torsion angle in the zooming process, and the time required by the torsion angle of the liquid crystal molecules is shortened, thereby realizing the quick response zooming effect of the zoom lens.
Example 2
This embodiment provides a block diagram of a system corresponding to the method described in embodiment 1. Fig. 4 is a block diagram of the structure of a quick zoom system of a zoom lens according to the present embodiment, as shown in fig. 4, comprising:
An acquisition module 10, configured to acquire a current focal length before zooming and a target focal length after zooming of the zoom lens;
a determining module 20, configured to determine an overvoltage voltage required to be applied to each channel of the zoom lens according to the current focal length and the target focal length;
the fitting module 30 is configured to obtain a target overvoltage time corresponding to each channel by using a polynomial fitting algorithm based on the overvoltage voltages, where the target overvoltage time refers to a time period spent by the real-time voltage before zooming of each channel to reach the real-time voltage after zooming;
an applying module 40, configured to apply a predetermined overvoltage voltage exceeding the target overvoltage time to each channel according to the relationship between the current focal length and the target focal length;
and the switching module 50 is used for triggering a timer to start so that each channel is switched to the real-time voltage of each channel after the zoom lens zooms when the duration of the preset overvoltage voltage applied by each channel reaches the target overvoltage time, so as to complete the zooming of the zoom lens.
Further, the acquisition module 10 includes:
a first calculating unit 11, configured to obtain focal lengths corresponding to respective zoom states according to optical parameters of the zoom lens;
A tabulating unit 12 for forming a zoom focal length table based on the zoom states and the focal lengths corresponding thereto;
and the inquiring unit 13 is used for inquiring the current focal length of the state of the zoom lens before zooming and the target focal length of the state of the zoom lens after zooming according to the zoom focal length table.
Further, the determining module 20 includes:
a second calculating unit 21 for calculating real-time voltages of the respective channels of the zoom lens based on the current focal length and the target focal length, respectively;
a third calculation unit 22 for calculating an applied voltage to be applied to each channel after zooming based on the two real-time voltages;
a determining unit 23 for determining the overvoltage voltage to be applied to each channel by using an overvoltage mechanism according to the applied voltage.
Further, the fitting module 30 includes:
a first applying unit 31, configured to apply overvoltage voltages corresponding to the channels to be applied, respectively;
a fitting unit 32, configured to obtain, based on the overvoltage voltage, a time length spent by the real-time voltage before zooming to reach the real-time voltage after zooming for each channel through a polynomial fitting algorithm;
a definition unit 33, configured to define the duration as a target overpressure time required for zooming the channels.
Further, the applying module 40 includes:
a judging unit 41 for judging whether the current focal length is smaller than the target focal length;
and a second applying unit 42, configured to apply a predetermined over-voltage exceeding the target over-voltage time to each channel if the current focal length is greater than the target focal length, where the predetermined over-voltage is greater than a maximum value of real-time voltages of each channel after zooming of the zoom lens.
Further, the switching module 50 includes:
a timer unit 51 for starting a timer to time the overvoltage time for applying the predetermined overvoltage voltage when the predetermined overvoltage voltage is applied to the channels;
a timing unit 52 for triggering a timer start signal when the overpressure time reaches the target overpressure time;
and a switching unit 53, configured to switch the predetermined overvoltage voltage applied by each channel to a real-time voltage of each channel after zooming of the lens when the voltage switch receives the timer start signal, so as to complete zooming of the zoom lens.
The above-described respective modules may be functional modules or program modules, and may be implemented by software or hardware. For modules implemented in hardware, the various modules described above may be located in the same processor; or the above modules may be located in different processors in any combination.
Example 3
The embodiment provides a quick zooming method of a zoom lens. This embodiment differs from embodiment 1 in that: step S204 of the present embodiment is different from the specific step of step S104 of embodiment 2, and step S204 of the present embodiment specifically includes:
s2041, judging whether the current focal length is smaller than the target focal length;
and S2042, if so, respectively applying a preset overvoltage voltage exceeding the target overvoltage time to each channel, wherein the preset overvoltage voltage is zero.
According to the above steps, in this embodiment, the current focal length is smaller than the target focal length, which indicates that the zooming of the liquid crystal lens is in a state of short focal length and long focal length, as shown in fig. 5, which is a schematic diagram of a voltage change of a certain channel of the short focal length and long focal length of the liquid crystal lens, and the channel voltage V2 before zooming is larger than the channel voltage V1 after zooming, and the application of a specific Y voltage (0V) to the liquid crystal molecules accelerates the rotation acceleration thereof within the overvoltage time t2 according to the characteristics of the liquid crystal molecules.
Example 4
This embodiment provides a block diagram of a system corresponding to the method described in embodiment 3. Fig. 6 is a block diagram of the structure of a quick zoom system of the zoom lens according to the present embodiment. This embodiment differs from embodiment 2 in that: the specific functions of the application module of this embodiment are different from those of the application module of embodiment 2, and the schematic structural diagram of the application module of this embodiment specifically includes:
A judging unit 41 for judging whether the current focal length is smaller than the target focal length;
and a third applying unit 43 for applying a predetermined over-voltage exceeding the target over-voltage time to each channel if the current focal length is smaller than the target focal length, wherein the predetermined over-voltage is zero.
Example 5
The fast zoom method of the zoom lens described in connection with fig. 1 may be implemented by an electronic device. Fig. 7 is a schematic diagram of the hardware structure of the electronic device according to the present embodiment.
The electronic device may comprise a processor 61 and a memory 62 storing computer program instructions.
In particular, the processor 61 may comprise a Central Processing Unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, abbreviated as ASIC), or may be configured as one or more integrated circuits embodying the present application.
The processor 61 reads and executes the computer program instructions stored in the memory 62 to realize the quick zooming method of the zoom lens of embodiment 1 described above.
In some of these embodiments, the electronic device may also include a communication interface 63 and a bus 60. As shown in fig. 7, the processor 61, the memory 62, and the communication interface 63 are connected to each other via the bus 60 and perform communication with each other.
The communication interface 63 is used to enable communication between various modules, devices, units and/or units in the present application. Communication interface 63 may also enable communication with other components such as: and the external equipment, the image/data acquisition equipment, the database, the external storage, the image/data processing workstation and the like are used for data communication.
The electronic apparatus can acquire the quick zoom system of the zoom lens, and execute the quick zoom method of the zoom lens of the present embodiment 1.
In addition, in combination with the rapid zooming method of the zoom lens in embodiment 1 described above, the present application may provide a storage medium for implementation. The storage medium having stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement the fast zoom method of a zoom lens of embodiment 1 described above.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. A method of rapid zooming of a zoom lens, comprising:
acquiring a current focal length before zooming of the zoom lens and a target focal length after zooming;
Determining overvoltage voltages required to be applied to all channels of the zoom lens according to the current focal length and the target focal length;
obtaining target overvoltage time corresponding to each channel by adopting a polynomial fitting algorithm based on the overvoltage voltage, wherein the target overvoltage time refers to the time spent by each channel from real-time voltage before zooming to real-time voltage after zooming;
applying a preset overvoltage voltage exceeding the target overvoltage time to each channel according to the relation between the current focal length and the target focal length;
when the duration of the preset overvoltage voltage applied by each channel reaches the target overvoltage time, triggering a timer to start so that each channel is switched to the real-time voltage of each channel after the zoom lens zooms, and completing the zooming of the zoom lens.
2. The method for rapid zooming of a zoom lens according to claim 1, wherein the step of obtaining the current focal length of the zoom lens before zooming and the target focal length after zooming specifically comprises:
acquiring focal lengths corresponding to all zoom states according to the optical parameters of the zoom lens;
forming a zoom focal length table based on the zoom states and the focal lengths corresponding to the zoom states;
And inquiring the current focal length of the state of the zoom lens before zooming and the target focal length of the state of the zoom lens after zooming according to the zoom focal length table.
3. The method according to claim 1, wherein the step of determining the overvoltage voltage required to be applied to each channel of the zoom lens according to the current focal length and the target focal length comprises:
respectively calculating real-time voltages of all channels of the zoom lens based on the current focal length and the target focal length;
calculating the applied voltage to be applied to each channel after zooming based on the two real-time voltages;
and determining the overvoltage voltage required to be applied to each channel by adopting an overvoltage mechanism according to the applied voltage.
4. The method for rapid zooming of a zoom lens according to claim 1, wherein the step of obtaining the target over-voltage time corresponding to each channel by using a polynomial fitting algorithm based on the over-voltage, wherein the target over-voltage time refers to a time length consumed by each channel from a real-time voltage before zooming to a real-time voltage after zooming specifically includes:
applying overvoltage voltages which are needed to be applied correspondingly to the channels respectively;
Obtaining the time length spent by the real-time voltage before zooming to reach the real-time voltage after zooming of each channel through a polynomial fitting algorithm based on the overvoltage voltage;
the duration is defined as the target overpressure time required for zooming of the channels.
5. The method for rapid zooming of a zoom lens according to claim 1 or 4, wherein the step of obtaining the polynomial fitting algorithm comprises:
applying overvoltage voltages which are needed to be applied correspondingly to the channels respectively;
acquiring real-time length consumed by the real-time voltage before zooming to reach the real-time voltage after zooming of each channel in real time through a timer;
calculating the budget time spent by the real-time voltage before zooming to reach the real-time voltage after zooming of each channel through a prefabricated fitting algorithm according to the overvoltage voltage;
comparing and fitting based on the real-time duration and the budget duration to obtain an experience coefficient;
and applying the empirical coefficients to the prefabricated fitting algorithm to correct the empirical coefficients to obtain the polynomial fitting algorithm.
6. The method according to claim 1, wherein the step of applying a predetermined over-voltage exceeding the target over-voltage time to the channels, respectively, according to the relationship between the current focal length and the target focal length, specifically comprises:
Judging whether the current focal length is smaller than the target focal length or not;
if not, respectively applying a preset overvoltage voltage exceeding the target overvoltage time to each channel, wherein the preset overvoltage voltage is larger than the maximum value in the real-time voltage of each channel after the zoom lens zooms;
if yes, respectively applying preset overvoltage voltage exceeding the target overvoltage time to each channel, wherein the preset overvoltage voltage is zero.
7. The method according to claim 1, wherein when the duration of the predetermined over-voltage applied by each channel reaches the target over-voltage time, triggering a timer to start a real-time voltage for each channel to switch to each channel after zooming of the zoom lens, so as to complete zooming of the zoom lens, specifically comprises:
starting a timer to count the overvoltage time for applying the preset overvoltage voltage when the preset overvoltage voltage is applied to each channel;
triggering a timer start signal when the overpressure time reaches the target overpressure time;
when the voltage switcher receives the timer starting signal, the preset overvoltage voltage applied by each channel is switched to the real-time voltage of each channel after zooming of the lens, so that zooming of the zoom lens is completed.
8. A fast zoom system for a zoom lens, comprising:
the acquisition module is used for acquiring the current focal length before zooming and the target focal length after zooming of the zoom lens;
the determining module is used for determining overvoltage voltages required to be applied to all channels of the zoom lens according to the current focal length and the target focal length;
the fitting module is used for obtaining target overvoltage time corresponding to each channel by adopting a polynomial fitting algorithm based on the overvoltage voltage, wherein the target overvoltage time refers to the time spent by the real-time voltage before zooming of each channel to reach the real-time voltage after zooming;
the application module is used for respectively applying preset overvoltage voltage exceeding the target overvoltage time to each channel according to the relation between the current focal length and the target focal length;
and the switching module is used for triggering a timer to start when the duration of the preset overvoltage voltage applied by each channel reaches the target overvoltage time, so that each channel is switched to the real-time voltage of each channel after the zoom lens zooms, and the zooming of the zoom lens is completed.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements a fast zoom method of a zoom lens according to any one of claims 1 to 7 when executing the computer program.
10. A storage medium having stored thereon a computer program, which when executed by a processor, implements a fast zoom method of a zoom lens according to any one of claims 1 to 7.
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