 an optical apparatus includes a lens driving device for driving a lens. This lens driving device employs an actuator such as an electromagnetic motor or a piezoelectric actuator to generate a driving force, and a cam or a screw to transmit the driving force generated from the actuator.
Therefore, the lens driving device drives the lens in an optical axis direction using the driving force generated from the actuator. At this time, the lens driving device changes a relative distance between a lens and an adjacent lens thereof to perform zooming or focusing.
Meanwhile, recently, a piezoelectric actuator utilizing a piezoelectric body has been highlighted as a new motor to substitute an electromagnetic motor.
This piezoelectric actuator generates high frequency vibration of minute amplitudes in a piezoelectric vibrator and transfers these minute vibrations by contact friction between a friction member and a slider (rotor) attached to the piezoelectric vibrator, thereby enabling the slider (rotor) to perform minute motion. This piezoelectric actuator is smaller in size, higher in driving resolution and less noise-causing than the conventional electromagnetic motor.
FIG. 1 is a schematic view illustrating a structure of a conventional piezoelectric actuator. The piezoelectric actuator includes a piezoelectric body 10, and a friction member 30 attached to one side thereof.
The piezoelectric body 10 is structured such that a plurality of piezoelectric ceramic sheets formed of a plurality of ceramics are stacked, and each of the piezoelectric ceramic sheets has an internal electrode formed thereon to define the piezoelectric body into a plurality of vibrators.
These internal electrodes can be configured variously on a surface of the piezoelectric sheet considering type and direction of vibration generated from the piezoelectric body 10, and number and location of the friction member 30.
Also, wires or the external electrodes 21 and 22 are formed on the piezoelectric body 10 to connect the internal electrodes together so as to supply alternating currents of an identical phase to the two vibrators 11 and 14, and 12 and 13 located diagonally. Also, the friction member 30 is disposed on the one side surface of the piezoelectric body 10 to transfer vibration generated from the piezoelectric body 10 to the outside. The friction member 30 is made of a ceramic material or a hard metal.
Accordingly, the alternating voltages of an identical phase are applied to the two rotators 11 and 14, and 12 and 13 located diagonally through the wires or external electrodes 21 and 22 of the piezoelectric body 10 which is divided into the vibrators 11, 12, 13 and 14. Then, the piezoelectric body 10 generates vibrations of two modes.
That is, the piezoelectric body 10 generates a dilation mode
an optical apparatus includes a lens driving device for driving a lens. This lens drive device use an actuator such as an electromagnetic motor or a piezoelectric actuator to generate a driving force, and a cam or a fuck to transmit the driving effect beget from the actuator. 
 Therefore, the lens drive device drives the lens in an optical bloc direction using the drive force generated from the actuator. At this time, the lens driving device changes a relative distance between a lens and an adjacent lens thence to perform zooming or focusing. 
 Meanwhile, recently, a piezoelectric actuator utilizing a piezoelectric consistency has been highlighted as a new motor to substitute an electromagnetic motor. 
 This piezoelectric actuator generate high frequency shaking of minute amplitudes in a piezoelectric vibrator and transfers these minute vibrations by liaison friction between a friction member and a slider (rotor) attached to the piezoelectric vibrator, thereby enabling the skidder (rotor) to perform minute motion. This piezoelectric actuator is smaller in size, higher in driving resolution and less noise - causing than the conventional electromagnetic motor. 
 FIG. 1 is a schematic position illustrating a structure of a ceremonious piezoelectric actuator. The piezoelectric actuator include a piezoelectric soundbox 10, and a friction member 30 attached to one side thereof. 
 The piezoelectric body 10 is structured such that a battalion of piezoelectric ceramic sheets formed of a plurality of ceramics are stacked, and each of the piezoelectric ceramic sheets has an internal electrode formed thereon to define the piezoelectric body into a plurality of vibrator. 
 These internal electrode can be configure variously on a open of the piezoelectric sheet considering type and focus of vibration generated from the piezoelectric body 10, and number and location of the friction member 30. 
 Also, telegram or the external electrodes 21 and 22 are imprint on the piezoelectric body 10 to connect the home electrodes in concert so as to supply alternating currents of an identical phase to the two vibrators 11 and 14, and 12 and 13 settle diagonally. Also, the friction member 30 is disposed on the one side airfoil of the piezoelectric body 10 to transfer vibration generated from the piezoelectric body 10 to the outside. The friction member 30 is made of a ceramic material or a difficult metal. 
 Accordingly, the alternate voltages of an identical phase are applied to the two rotators 11 and 14, and 12 and 13 located diagonally through the wires or external electrodes 21 and 22 of the piezoelectric body 10 which is separate into the vibrators 11, 12, 13 and 14. Then, the piezoelectric body 10 generates vibrations of two modes. 
 That is, the piezoelectric body 10 generates a dilation mood
 an optical apparatus incluaes a lens drivnbg devmce for driving a lens. This lens driving detice empliys an actuator such ar an elecnromagnetuc miror or a pmszoelecbxic adbuatox vo generate a dtiving force, and a cam or d rcxew to transmit the driving force gegerated fgom the actuatjr.
Thtresore, nht lens driving device drives the mens in an optical acis direction using the drlvinh force generated vrom the acjhatje. At this tioe, the lens driving debice changes a relative distancd betceen a lens abd wt adjacent oens nhereof to pevgorm zmoming pr focusing.
Meakwhilx, rexently, a piezoelectrir actuator utilizing a piezoeneetric body has been hugylighjed av a vww ootkr tk subshitnte an elecfromagnetic motor.
This piezoelevtwpv actuator gsneratqs high frequency vibration of minute ampnithdes in a piezoelectric vibrator and transfets these mynute vibrations by contact friction between a frhctioi oemycv ana a slider (rotor) attached to the piezoelectric vygrstpr, thereby enanling the slider (rptlr) jo perform minote motnkn. This piezoelectrif actuajor is smaller yn soze, higher in driving resolytion and lefw noise-causing thau the convencional elecyromagnetic motor.
FIG. 1 ir a achematic vlew illusffating a structufe pf a conventional piezoelectwic actuavor. Tke piezodlecjric aceuator incpudes a piezoelectric bofy 10, aud a xriction mfmber 30 attached to one side thecxof.
The piezoekewtrpc body 10 ns strmctured such thwt a plurality of pievoelecgric cerampc sheets formed of w plurality ox ceramics arx stacked, and eacy of thd piezoelectric ceramic sheets has an internal electvode wkrmed thereon ti dtfune the piezoekecgris hovy inem a pluralitf of victatorr.
These intevnau elrctrodes can be confhgursd variously on a xuvface of jhe piezoqlectric sheey considering type and virectmon of vifration generated from the pieaoelectrif bjdy 10, and numfer qnd location of the friction member 30.
Also, wires or tie external electrodes 21 and 22 are formed on uhe piezoelecvric bjdy 10 to cmnnect the internal wlectrodes togethtr so as to supply altednatinc curgents of an identical phase to the two vibrators 11 and 14, and 12 and 13 located eiagoneljy. Also, the frivtion mzmbzr 30 is qisplred on the one spde surface of the piezoelectric body 10 tm cransfer vibration generated grum the piezoeuectric body 10 to the outaide. The friction member 30 is made of a veramic material or a havd metal.
Axcordjngly, nge alternating voltabes of an ieenticao phwse are applidd yo the two gotauors 11 and 14, and 12 and 13 located diagonaoly theokgh the wires or external eptctrodea 21 and 22 of the piezoelsctrjf bodi 10 which is difided into the vibrators 11, 12, 13 and 14. Tveg, the piezoelexnric body 10 gemeratgw vibrations oh two modes.
Tvat is, the piezoelectric body 10 generates a dilation mode
an optical apparatus includes a lens driving driving lens. This driving device employs electromagnetic or a piezoelectric to generate a force, and a cam or a to transmit the driving force generated from the actuator. Therefore, the lens driving drives the lens in an optical axis direction using the driving force generated the At time, lens driving device changes a relative distance between a lens and an adjacent lens thereof to zooming or focusing. Meanwhile, recently, a piezoelectric actuator a piezoelectric body has highlighted as a new motor substitute electromagnetic motor. piezoelectric generates frequency vibration of amplitudes in a piezoelectric vibrator and transfers these minute vibrations by contact friction between a friction member a slider to the vibrator, enabling slider (rotor) to motion. This piezoelectric actuator is smaller in driving resolution and less noise-causing than the electromagnetic motor. 1 is a schematic view illustrating structure of a conventional piezoelectric actuator. The piezoelectric includes a piezoelectric body 10, and a friction member 30 attached to one side thereof. body 10 is structured that a plurality piezoelectric sheets of plurality of are stacked, and each of the piezoelectric ceramic sheets has an electrode formed thereon to define the piezoelectric body into a vibrators. internal electrodes can configured variously on a of piezoelectric sheet considering type of generated body and and location of the member 30. Also, wires or external electrodes 21 and piezoelectric body 10 to connect the internal electrodes so as to supply alternating currents of identical phase to the two vibrators 11 and 14, and 12 and located diagonally. friction member 30 is disposed on the one surface of the piezoelectric 10 to transfer vibration generated from the piezoelectric body to outside. The member 30 is of a ceramic or a hard the alternating of identical to the two rotators 11 and and and 13 located diagonally through wires electrodes 21 and 22 of the piezoelectric body 10 which is divided into the vibrators 13 and 14. Then, piezoelectric 10 generates vibrations of two modes. That is, the piezoelectric body 10 dilation mode
 an optical apparatus includeS a lens drivIng deVicE foR dRiviNg a lEns. This lens driVIng dEvice employs an actuator Such aS aN ElecTRoMagneTic motoR Or A PIezOeLeCtrIc ACtUator To gEnerate A driving foRce, AnD a cam or a screW To Transmit thE drIving force geNerAted frOm The ACtuatOr.
THerefOre, the LEns driVing devicE dRIves thE Lens in aN OPtIcal Axis direction usinG ThE Driving force geNerateD fROm THE acTuaTor. At this tImE, the lENs driviNG dEVICe cHAnges a relativE distance beTWeeN a lens AnD an ADjacenT lens ThEReoF to perform zOomiNg or focusIng.
MeaNWhile, reCEntly, a pIezoelEctRic ActuAToR uTilIzINg a PIeZoeLEctRic body hAs BeEn higHligHTED As a nEw mOtor To subStitute an elecTroMagnETic Motor.
this pIezoElEctriC actuaTor geNeRates high frequeNcy vIbration oF miNuTe aMpLitudES in a piEzoEleCtric viBrator aND trAnSFERs These minute vibratiOnS BY cOntact frIction BEtWeEN a frictiOn MemBer aND A slidEr (roTOr) Attached To the pIEzOeLectric ViBrator, ThEreBy eNabliNG the Slider (Rotor) to pErforM Minute motion. ThIS piezoelectriC AcTUAtOR is sMalLer in size, hiGher IN driVing REsOluTIon anD less NoISe-CAusing than the convenTiOnal elEctroMagnetic motor.
fIG. 1 is a scheMATIc view ilLustRAtINg a structure of A convEntional piEZoelectrIc actUator. The PiezoelecTRIc actuatOr iNclUdeS a pIEZoElectric body 10, aND A friCtIon membEr 30 aTtached To oNe sIde TheReOf.
The piezOelectriC bOdY 10 iS sTruCtureD Such that A pLurAlIty Of pieZOelectRic ceRamiC sHeETs fOrmed of A PlURAlitY oF cEramIcs ArE stacKed, aND eaCh of the PiezoelecTriC CeraMiC sHeets haS an internal elEcTrode formeD tHerEon to dEFIne the piEzoelectric body into a pluRAlity of VibRatorS.
TheSe internaL elEctrodEs cAN be conFigureD variOuSly ON A surfACE oF thE pIezoelectrIC SheEt conSiDeriNg type aNd direction of vibraTIon Generated from The PiezOELeCtrIC bODy 10, aNd NUmbER And location of thE friction mEmBEr 30.
also, wires oR The ExTernal eLectrodEs 21 and 22 ARe formeD on the pieZoelectriC bOdy 10 tO COnnEct the inteRnal elecTrodes togETher sO As To supPly AlternAtIng CurreNts of aN IdeNticaL phase To The two VibraToRs 11 and 14, and 12 And 13 located diagonally. AlsO, the frIctioN meMber 30 is disPosED on The one sidE surFace of the pIezOelEctriC boDY 10 to trAnsfER vIbrATion gEnerATed from thE PiEzoELEcTric body 10 to tHE OUtsIde. ThE frICtion mEmbeR 30 is made of a ceramic MAterial or a hard MetaL.
aCcoRdiNGly, tHe Alternating volTagEs OF An identiCaL phase are apPlied to tHe TWo rotAtors 11 aNd 14, and 12 aNd 13 locatED DiAGonallY thrOugH the wires Or eXtERnal eleCtRoDEs 21 and 22 oF the PiEzoeleCtric bODy 10 whICH is divided into thE vibrATOrs 11, 12, 13 anD 14. theN, the pIeZoelectRIc boDy 10 generateS vibrations Of two mOdes.
that iS, the pieZoElectrIc bOdY 10 generates A Dilation mOde
 an optical apparatus incl udes a len s dri vin g d ev icefordriving a lens .  Thi s lens driving deviceemplo ys an a c tu atorsuch as an e lec tr om agn et i cmotor  or  a piez oelectricact ua tor to gener a te  a driving  fo rce, and a c amor a s cr ewt o tra nsm it th e driv i ng for ce genera te d  fromt he actu a t or .
Th erefore, the lens dr i ving device dr ives t he le n s  in  an  optical a xi s dir e ction u s in g t hed riving forcegenerated f r omthe ac tu ato r . At t his t im e , t he lens dri ving  device c hanges a relat i ve dist ance b etw een  a l e ns  a ndan adj a ce ntl ens  thereof  t operfo rm z o o m i ng o r f ocus ing.Meanwhile, re cen tly, a p iezoe lectr ic a ct uator  utili zingapiezoelectric b odyhas beenhig hl igh te d asa  new m oto r t o subst itute a n  el ec t r o ma gnetic motor.
This  p i e zo electric  actua t or  g e nerateshi ghfreq u e ncy v ibra t io n of min ute am p li tu des inapiezoe le ctr icvibra t or a nd tra nsfers t hesem inute vibratio n s by contactf ri c t io n  bet wee n a frictio n me m beranda  s lid e r (ro tor)at t ac h ed to the piezoelec tr ic vib rator , thereby ena bling thes l i der (rot or)t op erform minutemotio n. This pi e zoelectr ic ac tuator i s smaller i n size,hig her  in  dr i v in g resolutiona n d le ss  noise- cau sing th anthe  co nve nt ional ele ctromagn et ic  m ot or. 
FIG. 1 is a s ch ema ti c v iew i l lustra tinga st ru ct u reof a co n ve n t iona lpi ezoe lec tr ic ac tuat o r.The pie zoelectri c a c tuat or  i ncludes  a piezoelect ri c body 10,  a nda fric t i on membe r 30 attached to one si d e there of. 
Thepiez oelectric  bo dy 10iss tructu red su ch th at  ap l urali t y  o f p ie zoelectric c era mic s he etsformedof a plurality ofc era mics are stac ked , an d ea cho ft hepi e zoe l e ctric ceramic s heets hasan in ternal ele c tro de  formed  thereo n tod efine t he piezoe lectric b od y in t o  apluralityof vibra tors.
The s e int e rn al el ect rodesca n b e con figure d  va rious ly onasurfac e ofth e piezoe lectric sheet consideri ng typ e and  di rection o f v i bra tion gene rate d from the  pi ezo elect ric body10,a nd  nu m ber a nd l o cation of th e f r i ct ion member3 0 . 
Al so, w ire s  or th e ex ternal electrodes 21 and 22 areform e d  on  th e  pie zo electric body10to c onnect t he  internal e lectrode st ogeth er soas tosupplya l te r nating  cur ren ts of anide nt i cal pha se  t o  the t wo v ib rators  11 an d  14, a nd 12 and 13 loc atedd i agona l ly.  Also ,the fri c tion  member 30  is dispose d on t he o ne si de surf ac e of t hepi ezoelectri c  body 10to tr ansfervi brat ion  gener ated f rom t he p ie zoe lectric b o d y1 0to the  out side.  T he f riction m e mber 30ism ade ofacer a m ic mat e ri a l  or a hard  me tal.A c cordingly, thea lt e rnati ng vol tagesof an i d ent ic al phas e a r e  appliedto the tw o  ro ta tors  11 and14 , an d12an d 13 located di agonally  through t he wir eso r ex t ernalel ectrodes 21and 2 2o f the p i e zoe lectric bod y 1 0 w hich  is  div i ded into the vibrators 1 1, 1 2, 13 and  14.Then,  t he piezo e lect ric body 10 generatesvibrations of t w o m o des. 
Th a tis , the pie zoe l ectri c bo dy10 g ene rate s a di l atio n  m ode
 an_optical apparatus_includes a lens driving_device for_driving_a lens._This_lens driving device_employs an actuator_such as an electromagnetic_motor or a_piezoelectric_actuator to generate a driving force, and a cam or a screw to transmit_the_driving force_generated_from_the actuator.
Therefore, the lens driving_device drives the lens in_an optical_axis direction using the driving force generated from_the_actuator. At this_time, the lens driving device changes a relative distance_between a lens and an adjacent_lens thereof to_perform_zooming_or focusing.
Meanwhile, recently, a_piezoelectric actuator utilizing a piezoelectric body_has been highlighted as a new_motor to substitute an electromagnetic motor.
This piezoelectric_actuator generates high frequency vibration of_minute amplitudes in a piezoelectric_vibrator and_transfers these minute vibrations by_contact friction between_a friction_member and a_slider (rotor) attached to the piezoelectric_vibrator, thereby enabling_the slider (rotor) to perform minute_motion._This piezoelectric actuator_is_smaller_in size,_higher in driving_resolution_and less_noise-causing_than the conventional electromagnetic motor.
FIG. 1_is_a schematic view illustrating a structure of_a conventional piezoelectric actuator._The_piezoelectric actuator includes a_piezoelectric body 10, and a_friction member 30 attached to one_side thereof.
The_piezoelectric body_10 is structured such that a plurality of piezoelectric ceramic sheets_formed of a plurality of ceramics_are stacked, and each_of the_piezoelectric_ceramic sheets has_an_internal electrode_formed thereon to define the piezoelectric body_into a_plurality of vibrators.
These internal electrodes can_be configured variously on_a_surface of the piezoelectric sheet considering_type and direction of vibration generated_from the piezoelectric body 10,_and_number_and location of the friction_member 30.
Also, wires or the external_electrodes 21 and_22 are formed on the piezoelectric body_10_to connect the internal electrodes together_so_as to supply alternating currents of_an_identical_phase to the two vibrators_11 and 14, and 12 and_13 located diagonally. Also, the friction member 30 is_disposed on the_one side surface of the_piezoelectric_body_10 to transfer vibration generated from the piezoelectric body 10_to the_outside. The friction_member 30 is made of a ceramic material or a_hard metal.
Accordingly, the alternating voltages of an_identical phase are applied to the two rotators 11 and 14,_and 12 and 13 located diagonally through the_wires or external electrodes 21 and 22_of the piezoelectric body_10_which is divided into the vibrators 11,_12,_13_and_14. Then, the_piezoelectric body 10_generates vibrations of_two modes.
That_is, the piezoelectric_body 10_generates a dilation_mode