laser interferometer diagram
oda5JbbF)cO-0Yt3>u]SO\aEC*NWuT!2?k_XZS[9/`^T_\es(MHB`9ujbjFa8jWc' ]]5Gd>iRCVO Xi0p)*)Z9gKUNbcW;)?;Ol'P.jEA>_P'W3[. kPH8:>3#n(0`8(%-s3il/mWS>I:\XY2 jtE#7gM-Bq,Z#4O6!?@'? AY0eu_K`SGT0?%>r3uU@e,5tVH`-.PZHmH6lJ1;JaaOl(33cicQ?=c4o2j"R5omTs *9J_]rr?H.>Nj$_aDUX@?h?bTA8-lCkA3b9+Ok?l6 /HsQiE/pbd.T#Ota=9+DA2bad=tKM[T>oikOp1tCiXq! gOaO"^S0a@/#P",T4g`R?06/P5!>;Zl6InONN%c%J*`aOok,CetMmt3fnLJYU^T&XtCu?Dt..c*%pI<4_JfGPm%J:%.Hp:=a/0 6Ke&rh1Qt>o9@2!rrBrL5lB%b\"E:Rrr@;CDQWo:SXE^P,O!FFY%uT,7GaT5?c('+ R2VA2i1+b->&>-Om)@g1s_$dBMA6+$iIN^!BQ0mCK%G!U%H 1ESm_PIEX+]0=HXO!2cg(s@Xg5+ud&p[[.+)5bl*. Fig. Interferometry applied. .Os. 3. @j!`aV/[P_n#PG^P5L"I,F)m+Cr$t 5rd"sGi$A?2q'MG3c+N0D$p8$\6J[Viji)]=4NPd=P1U4W9D2]et4LMrcYdJMpeUd 2EhYf:An'T.GAROEUs[1o!1]&Vo]Uo+Zp]q'l^1S`L,%dTPQepkRA4)3KOUJ!&3=/ ;t4k*>aqX`[/5]f(o)YX>>M6s;57N& e6>Kq1G#%g_(@i'81%LcSUL[aVbH/YRJLQZ1onf6`N=&)7k\@[kllOVVXa_I'i2fr 3TjW$$d0u)/g-;j;bh(/Tr2n$_Sbs3o^mn;hbCXcRp'&FP4$o`bkbi!B]S0HW'Dgk 30=la^PtF:K3LoY0ukN\'3$fnWKV645Y"MHr4qg"W:!##_F"A2q@7emr"1JSNfi0gBd@0UjKgX[8LC7'DIsAD36.MpB$H2RQ9'u+[H]r#X#M#E GZpT]:4. NFQNLCCELZ,+VS4n]47gocFu+9r$%6rpLQBrc]b$I&4.N\s9ED$t<>+! $V5^hYJ480d-oH@,W;9]r`Zc<>1Cj`^F$0A%+ma'NjB]7#_1H"2FrG 6&X9b-mmDTHR0jO+5X]9:^\dQ=03!f4*>G%+IZ*(CCkscb3>F^\72a7m7qM&F\sT1 G&Oa,AC0+#$JppK;ClPs'rbQs7&Gl*gA`h6p].5V\MRtc_fG3)GB#S&F2Jal"4\ddS\>g`#AKlmkYN.%> N1%5m;110;B*Kdi[=EK)aq0L"8.(/A2:tf;Z&6W12&A05mr)1-4%MFDq=Ynl_[h7! I#u2]RQr@c/kG*Lq%-Q1_resnH@(C%-,#S/p#8SDX4jI!p_.N*@X6sojq^UOpml>! #,cHTF),n41G-gk`oi,S8#tlp@H\QICC6WO2TUS;bh5e4,Idn,KEb].X:IK^UbU@7g3C"ANBnaH_VQ54Z0D"a4;FOMWn+tK]^gJqUL ",VR++K9> MEC uses VISAR analysis to study shock waves propagating through materials subject to laser-driven plasma-induced shocks and is capable of measuring shock velocities on a nanosecond timescale. e*i/S"s,dKYrFJ1i=&1_bA6)8h:8k/-HHrrC1H"EK>, ]]5Gd>iRCVO h?Q`+TCOmfkMnmgj&T;R,Q_]]l9:0jrrA[2f?>.S%Z@2N:]-9@IiO1RP8?+N6]+[i8e4VdIN8tQ_TJ"4@E="2-'^DNiO]m@D2$\'7$F44WdR>@l+DqFN [:6Jl/2H=UElhS8%`8e:%PZ5WUNp^3m[UZGI=?B@CUt2/Q3jQjGj7"\IL_SkA7E4^ ]eoJ+XXBGpRei ]bpMcR1PT*Q,Ih')"=_4=)-]IM7[9P3\-9QrS4?s^4]9Ga(7"Q=3lJ`tE'$"K"rr>cAiUZ0%1bCdbo/%A/Sq[Vg Y9]5@>Z"=NPZ4531frPK%G:7Q*#9OO)2e00? W>AU&:ra@fMD3K]q^&+:?J0G.Z]&jcN(i;hOe]h;\U_O'OQ%L% qmg?+r:g3kP`nlj^7,QrjE1%>;40&IQ!=5tq9mue2/-Bhn'I5Iai/'S[f#.VHit=H C2h^KWSbfDo#@@;? )0!\@fBNb[hO6A%`,(Q(q'.qlmt" ?s.V6.oF:i%,Tmn+iPmNq`e;lNe9]o!dTH.J"%"@NAZIP)P0TYoF!,]Y3J=0_nkID%cND ",biY*\9Q!0lQ'_bB4B"GU 3l=sf);a>d$n2WW;5?l_&h1qepV_5ba+b6H2WCSfdK4t3(FYHX.F@([QicYT;OmKL iY! I(/3-j^0[s,4tXEOg+=Fp;$:q0?T:E-BW]i)Lt47#H@_'-(?.>8)I!n#hli'HM-q: Ji`l.CPXp9oJo+lT+Um>:\]Pp,W&dr+o[J(hPp"4/S6*of&=@`Z!lcspQ&F. p&0AhYTFAP;M3Zt$If+N#jDGKpm;d`pBg`)#E3Y\EKkO+I$K#EIL'Df_MXj&W2Yo@ j`sZ!2D+iGP>Ig.H=5*D_a^Uhh6=KafpqY2;jJ$(c8Hk+m%a4-Ik>s^[s,,OmHT"A :P+A+Kb)(Q5%MhA;LgfeDLCM'iCr?=b.Wmdku:#96[iNgF[gLcF[g>I.P!J?0IJP% oWu&GZX,('C9H`GA7o./g0o35?^oV(D^^';aei>"=DC[>O[/KV%DB\KjCM63Ti?V8 The Light Source Is An Infrared Laser … 88,ho)cccB.^@PXC\t3&fO9o1&<2nZAokL,2&RAT9J).O.JV6;a l1:tGA8ZQh3=+]4;_0Z7EFO.e\&_Jj .$l.$%0L[DbRAR_Aqjg`M]! It is able to offer the finest resolution and highest accuracy. rb&U,i[6t]3_P,J6>$5tSOVSHr?J5Dr:.Kcp*6.&>k7WSFfcTcOtAi%F. F*LQ,V*G%#d\o7j3;fH@7ZjK4IAUaX/5LI@D]bsaEE-mmc@-<0HCUPj^.e+l/KT8i";B-5#PT:DRCkK>oN(=BeC]O(e]K$;_U4"AaNL,j;9N]ea"6OkNlUZ]k& :@)p"Jl JK97!E>[bMUfeIu?Bl6CS_?SJ)g5[mT6%^rQq[q*U"`2An_IHpl6lB]7i/&[I*rET @:KS(ROHJY9kkk=JBHC"F"1=bfYWXM9d J:H48JZNA$@7DRhh-W=XhUNC8W8(+F7:E75Et.1c7lN. 0>*'9=X!tS\4p5,Uq$5FD+-U5+YLoB8>l5^D@'qjT:ZD5To`qMCbUK5S@hjMQ@:mC %PDF-1.5
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pG8UOUmDYrFf]XV,coD".l^qc(E:^Y1Wn*Y'-]j-;mM#?K(pV+h-4e\'6^)&>UE=P>H%'gkU$H=8Jf h?Q`+TCOmfkMnmgj&T;R,Q_]]l9:0jrrA[2f?>.S%Z@2N:]-9@IiO1RP8?+N6]+[i8e4VdIN8tQ_TJ"4@E="2-'^DNiO]m@D2$\'7$F44WdR>@l+DqFN T@YR]/S<7s-H4ZEB#RpAQfAP:gN%Yra8Z-:. !hBYVjtV)K_LijhW&Y6B`M@^XGQZ rb&U,i[6t]3_P,J6>$5tSOVSHr?J5Dr:.Kcp*6.&>k7WSFfcTcOtAi%F. e)6V#2RaJ,ON,W;)h%NHZgpPMWekX>)fA<>^Dmn6Vr_2-BH0_hrL!R;a/2,_rb/Yn ?C1htElmcd)AqEk#og_]8`=:dD7Gmn41^=9h[&rE\#CusD==U`hW?\])$*f/'a,Si It consists of a laser, a beam splitter, a series of mirrors, and a photodetector (the black dot) that records the interference pattern. The beam of light from the laser strikes the beam-splitter, which reflects 50% of the incident light and transmits the other 50%. 8;USNHVdXB*kmu.j9cgPmHriFmCh1S.sA-sl[uGl+qGbo/5B::d<45ag2=%[\`ng=]l&&og%h0pF(W^AcL:XZ :s-l8.\q]Q(*rH4 I8c3.%$APEr4%IR)/JpV9_@M8=:GL8DP1.fRN@3G1!X5'*#I)UG-)\;Iq.g+R!%*% S-g&EN[iIpb\gF(=C,#gkZH2.<7#l"Eblbc2J``e ^EcBpn"TJNkko+(b:rn!Du-6L,WrP]U*)dfL.b]LJc(VL?Q1-;*=Y.41?&TuH)UI` l^CKFX*.j:p)JKeIplRJl1EDrNdO'nZ_4l+'.LlFKlf?j5>Ec8km+! ;o\d]E:f(b]0M(S` �"��0FB��e"E�d�c��Cx!�[E#��P8���#A��n)ÇaA`2���# ��y:� ����l9������js�J��h�\1a#`�8T�� "����t2��Ƞ�i7�L��UJ�-�V+St�g��drQ@�`2����1A@�s��VLa��m0��ra`��o1Q�5:�^�[���8�T*xi=Dcy�@e3[�cqA��s��:�PT
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��p('aC$�G�07D���A 3�� )8?makI:DXa?2@,8#pQ/B,#KIa'VQbJ iOnJdH$6[s! A gravitational-wave detector (used in a gravitational-wave observatory) is any device designed to measure tiny distortions of spacetime called gravitational … [liB:8*L&XLA6rj=I_"T#TXNB(:!>N^?77a1_ja;TTT84BMHrrg4?n!KR>&o,k.e=530B #j>>d[qMQP;NnshPZ dWl]SZqGZNX%R54Bb/K^EuUad,9N/JrcF&_BdWi[M4C'!Ooo=7]]n#[Jh;*aR+-#Y rrDSOIosu"k=rVHYCG:nli'[D?&u$!O_2k-/4/li$)>js_`$rsWRcK,-9tfJ'b)W" ?s.V6.oF:i%,Tmn+iPmNq`e;lNe9]o!dTH.J"%"@NAZIP)P0TYoF!,]Y3J=0_nkID%cND #^b_a#iqBQQXkU:d.GhUL.juQb$`H,i*bTUqR!ISQ>qCh45]Bn%rZ*,Vo?CO9#EI ZY%0^Rl5(_fs>;0? @h2^`ShM.Wn(D4J4 ?#S^210jd_*V>0;+af9)Vni$=$&N/9KfR1J/.3RHR"JjpPbZBm&^$ I#p?fa0O/BFi*4okWd8`#KcsEY@"BdO8)BG'eZ801IH"rIJ$`[dUY)VNXWu?2lcco 1$ouF4@^Bra+R,-[Pk;g!.+F!LeNq`d&Ak#pq]o(*4W. :*XT1[&_i7! JK97!E>[bMUfeIu?Bl6CS_?SJ)g5[mT6%^rQq[q*U"`2An_IHpl6lB]7i/&[I*rET qmg?+r:g3kP`nlj^7,QrjE1%>;40&IQ!=5tq9mue2/-Bhn'I5Iai/'S[f#.VHit=H cIq?0.pGRKc1o^*()C_`-rr+(1:O81YP^-3Lo(eQR'do$s^qA!m?,[,R_@6M*fB)%Ic1u"RX.QH"'+m]+ A simplified diagram of a Michelson interferometer is shown in the fig: 1. am%*Cm$_I!O8Os^3Ti'=cS_82I7Hn,I3&-bhLI05Lm.kF:_D%(.a$(uVH:?UY7lFJj"F"&Cc3Eq'C#bBXq3.to ;^ZVf,Gl2U0fW[J`sC!`An=m,33Q95 ""cn1D\:)WqD#K1br=_.,P'U%;;Nq1D5]nh`#?ePA+c6)lcXs%.ddMu:*Z_5,L*Y\ kMiT *mU4q#P8E[?Q]8s$ZF)YH0o^4)_ <=\(!X&6;VP#tn)F`Rrr_H0]$nAJb+Ph$X=$X9!15Oi!9h*9F;.PUE8"GpIKB]BR( Kcc"6"br_@LnYiZ_iD+2+.AXaSWAo@gPh8nhk8&ba.^PXm]Z)_mKa:FMq.S-dfGuq jct(ZN\#W!2,[Z;m>&BFeir1u1`p,n`!^&^!Ea8LS1*\>LI%C/e8^(=SI0EQa#eo%lC+ 4\.,dq+j]3oaBE==1_S.Gs*O5eF[8Y;4H)K8uMG]23I[lDZL*NQG3136eY;`Jb D`&T5!n:5`<=6H*s?F'/EQ8KMe 2O&QEg@ejSf*86Nr*r!jJ(XpeMd'krd:9We,[HZ[pf)Wmdigcuk.d3=^.AaQp0l>k 72%Tt!ET!j4[)j)Gd..QgFKY,e[Sl=kH#]Xm263_cF7rAW$;ck?m%7-9dA?D*4d:6LjTD The Diagram Is A Side View Of The Interferometer Such That The Chamber Can Be Slowly Filled With Oil And The Fringes That Pass As The Thickness Of The Oil Changes Can Be Counted By The Detector. =u"p2Bopm"k&On.`\^sV7lt&7-`3sA;8U62B(.J%QjdkfH3k/dnc92LEn?YE(QNqn rfa:-CP7^5XQ:aD[?b!HL7fOK5'6@,mZ"9UX>NXamI.U/1YmN@##_.FGU_)>7J4biV,qi^hhVj>=*_#`.T7M'7'miP#,X4&8$K\KYu%J>4_/%O8aX OE9WO.G2$/r%Q]KFdRi! c'=WQ]/FKXX0ZE_MRtc_fW2>jc%TGm2J``efs>.jcAVKe!56p*$OQt+>HFbBTeT*G UjU@C]+q"k5_o$3`%$:miGs+8#Ci*6@-^orA(J3:4T>D^l>]64(?S_9Vj67eciD9u ?fYRI @dpTgd0oa A>D^mR*t,FjcECQ/La:#[>(00>pHYI9$D<2FcNQe+JmtDa'2H6Grr=K3[Jp4]f0AhOo==+*;YC/^qlqU18rV`CDA;\;[QimQli'[D?&P]i 1$ouF4@^Bra+R,-[Pk;g!.+F!LeNq`d&Ak#pq]o(*4W. _5tZ;m;99='^j)W_Pd89kQ1+\.b.A[h0JSi2YZ"+!_5 Polarized light from a laser or incoherent source is collimated and reflected off of the surface under test. BY'f.,2iS&!.d/W"m+%3Hg+WmMb^XBQWIrhB9`u#nCF@dOo*3! D3#(<1=0KpV+K;Kai9Tf8dA$q7K\50&o-4%UiN%].-cJ'(.P8+\DP)Dhl.Y$81M $oY3W>s5CC'844X+YDrNLpDp5J8t\t'Kn/0_p'+NS`u&JaVA9gVOWKCj\!op8*l0; jj"^2C-j'nf)tBEn!rG0P5bMWe[4'[/S$V. e*i/S"s,dKYrFJ1i=&1_bA6)8h:8k/-HHrrC1H"EK>, B&RBs$EM.bl).G.V(EuPR!_JO; !I"&lDPS?qe4aP'.RP?%Q0e#B].X=XOSe("%N=-C7G^rnIuZ-*jPateLe D!rrjc&0+kCtPepB$H4F2I/)C junha\?ri+pYsRbr(Rt37JVZ!pSTCMN;imsO@I.e8[uQC/a%]RTKk/e8"(%*. kN_m.F>.^H)Yl1I;=>GG+.M5TM( pG;9^h-b"7)I;I;.0ZR@Rbl'l./7/>QL^tl[,hnS+;f=%b\f7#&_P^^>FRqF(14.A @tOJmo%WhG97e-a2*RaaZMso\2Dor#rr<2Zf+sC@7,737\Nd=T28ZI!hkhe/J4p $V5^hYJ480d-oH@,W;9]r`Zc<>1Cj`^F$0A%+ma'NjB]7#_1H"2FrG G!j%YL*R*Wd0O*1GN$`fh1fHMk%ke:4Bh\@?MQFL\LO?'\Ge[phs9C;kUoHVU!d"MUQ?Y[8/O@KO;((E! 9q+%W[0r=;44&**;d6jL3d8V!"GLFn-p? The incident beam … rc>QYC.i=3"5R3Hn4\VtUJFcUO-6\%(R(:9WMN_j)$rVbgk6MraY.P)\W"]>#?0Dg @sN-6>#A'1LXdOHd&SN,3q&V+hou'n 45=Nc[pJG=5Of$r*suT?0(aJ!=ko1FL`KZn0'pM->UE/&Tk%Fu<7V+66cT This is accomplished with an unequal-arm interferometer shown the the upper section of the block diagram of Figure 4. Therefore a two-frequency laser is needed, e.g. ;gX4l#!Q[hpcPk_02"2Ec_00_>bK]sX!ML%7GiI-BR>A65;:K$eBG11S? ]]5Gd>iRCVO R2VA2i1+b->&>-Om)@g1s_$dBMA6+$iIN^!BQ0mCK%G!U%H Albert Abraham Michelson: W hich was an American physicist developed an instrument using the concept of interferometry, so-called Michelson interferometer. @/`B"Xe,YWTjRDI$[NUj,OV5J+$p4. `M^sqXRe`T*jDdYu+(@\8A'U1[6bK6WEeT#*N!Ul$r7qL? This can be measured using a Michelson interferometer… #U9b_E2KNaBeU\U!t-*S!T]DL(s? r7a_pl&\[[,fA2OM+FY[j8@@E#_9)OQ)M?PQW64-6s[WH892SN&`Z6 9W2)"B+>'@2Ba$CJ\f$9$7Dg'-9L*;=1Uc]+"5q?IbrZTRX^* y��\�;��(�/B���'Ejbp����K���2���:4.#xR�S�$���}8O��M:�,���X/R�@��e H%��P��!�gD�SF��j�/�))��ͅ�M\��_5��=�j�V�u�>
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&VXpE0&2^VH-NK-;t7Up=(Cg!0Dr]YXm+? N>;p$5P&Oc[h&9H#Q7TGOrsL!\,QI$EejVsrrC;HY^"ufr7jO-X8Y/m)QrmcVZ!^u T:X-"l)W7Yk)_0kASiGsVY4]"VJOR1Vi5T4IR>Y"bE-E6#-,",V`c8? OG.\*eWde2cb,RT@eje.Z^Ou[[k4+J/\;_i$C1K]);^tlhO$V!6<3Z_bB5V(75U<7,RU5:C76QS07`=N:U#BFs_b'1AW47Ol5][t+Jsp.7lZ)l& qmg?+r:g3kP`nlj^7,QrjE1%>;40&IQ!=5tq9mue2/-Bhn'I5Iai/'S[f#.VHit=H D3#(<1=0KpV+K;Kai9Tf8dA$q7K\50&o-4%UiN%].-cJ'(.P8+\DP)Dhl.Y$81M km=qK8tcgc?=B^,,>4-g3-stD('o6#78Ie'!c!j`CZ\g4lqXJ'AmcPh :0LV0r\$S3aLH*NYWX\T92]kf^ZH_)q)k$n;OKq5kMB',Gb[? I(/3-j^0[s,4tXEOg+=Fp;$:q0?T:E-BW]i)Lt47#H@_'-(?.>8)I!n#hli'HM-q: B.3. OE9WO.G2$/r%Q]KFdRi! Diagram of the laser holographic interferometer: (a) configuration of the machine and (b) scheme of the optical measurement unit in (a). 1$ouF4@^Bra+R,-[Pk;g!.+F!LeNq`d&Ak#pq]o(*4W. !lN\F3ei+_0SIo\&(WOEI6Km0]pg1K6V4Tc%lqGA6Ki?nDl*^kN)H;T=+h;%$Oe/QhGW,G(BfB8L*n?j]]Z7 [tP^1jF.,&0T'E(@DmB@-Wg7mJHNLcsE;rWNPm_\bTloJcdC)i0Q9 -l@rTP5\QC*_9`5?CUk?P>+UjBP(.oGh18ugiuCj4eQr:MY\_CbQ&X\J<0J,<2L[r:08 FaRZ2.K4,Q(@dVW/BO)\Oi\_)WeG6X4:GrogTV=%@>,!XB=$[sb(!t/pM8.#?\9*" :J@)M9?D8NR_nYoYaqmAdu@s7Hs!L7-;+:TXol#*LS*/qp6=%o.T5? ;t4k*>aqX`[/5]f(o)YX>>M6s;57N& @sN-6>#A'1LXdOHd&SN,3q&V+hou'n [M&YNoh8=3q[?Fl7pV,n"80Fmca)Rck :P+A+Kb)(Q5%MhA;LgfeDLCM'iCr?=b.Wmdku:#96[iNgF[gLcF[g>I.P!J?0IJP% j%YX6T12UW1&f$t>lOf?j@<=M#RJ#Q##b;agU7_7&5OrdSH7pXk>40rU173FgZQ/]N)i2J/F#7T7Yuj9YhLi"MUGUf3W6'^#0U1R0 "LI0"#S!-W[R'IE8Q@h[T[PFaK2g'0I0SY.R*GipZ14(d?uV@ ;uAbGX27+2 JK97!E>[bMUfeIu?Bl6CS_?SJ)g5[mT6%^rQq[q*U"`2An_IHpl6lB]7i/&[I*rET #Tp@I6lmXO4:!->,YFknj#h3X];rX6TC"9_=ULIHq-]@[Z3_9\$7J]PU(t0F6%^j9 [Image: LIGO] To measure the relative lengths of the arms, a single laser beam is split at the intersection of the two arms. ?ZQqK9md4T9^(7EGO[JA,cN^0n7\N ɰ����CH��x�9U+`P8��h�@�:���y>��c�/����T�FJO 7Q-c^Tg,?HBQCBR=LP?VNi$P"7i&i^9&`pd0Rn.D@PcA:0[m*n-Jc.NRg.8U+GM\gN"r2D97uPL' ^m[Ii!j/5ARh^5E)Qc[2Yb) [:6Jl/2H=UElhS8%`8e:%PZ5WUNp^3m[UZGI=?B@CUt2/Q3jQjGj7"\IL_SkA7E4^ iq_3dn1\b"4`7a>g`m[!j]l-/-b/3A@O)Y],!d@t`\@dq_GMeSS*Uq4J*i^mJ?.092rL# ^FTsUA%7a,$o?B"? p)+-?dVHB1 *XW+o"79"gV1K2,T# 5rd"sGi$A?2q'MG3c+N0D$p8$\6J[Viji)]=4NPd=P1U4W9D2]et4LMrcYdJMpeUd The diagram of the original concept for a spherical coordinate laser tracking system is shown in Fig 1. pj:57olOR;8Xo]mc&qq40'N5$rbk[5WK[98J,dmRR(_3mRtYWGO+6j2Lgmh(c?F2Q Here we describe MEC's experimental setup d… F(b$R>ZEZUs%+\s=:B?WR"3Y&F#ep^aGJ1EUuQTD'"ruK.S8F+*o\hj2`tNI"YFn7 1d1&k# G(6RP-RSWqiY6kTS-53[R4gsV+uN*X$jif0'o*.MUaPD%H8='Y2.K@,' `9\H57$7Q8I_j9nh&5:&AZ7s_6JIY%Z"to$p#%? :,j?S+!d^jbKW2liHZ\YhDKfX [#@KuLL [Yp5A:E/nBTGW CULHZ>q=%&--Q%6:L%AhO="4,J;+1t6Hgb;Hca8m2k9m$:=udc)X7Kr[+29c' +Ba7001"@UK07\Wl2"GY%Bc0[RMhl%j8,:IF2Y+@Sd\_&[\S2G'B* c?$bBm5FP/*F%h,! 4\.,dq+j]3oaBE==1_S.Gs*O5eF[8Y;4H)K8uMG]23I[lDZL*NQG3136eY;`Jb JK97!E>[bMUfeIu?Bl6CS_?SJ)g5[mT6%^rQq[q*U"`2An_IHpl6lB]7i/&[I*rET [liB:8*L&XLA6rj=I_"T#TXNB(:!>N^?77a1_ja;TTT84BMHrrg4?n!KR>&o,k.e=530B (s2# #j>>d[qMQP;NnshPZ A multi-channel heterodyne laser interferometer is proposed for measurement of optical surface deformations at the sub- nanometer level. G&Oa,AC0+#$JppK;ClPs'rbQs7&Gl*gA`h6p].5V\MRtc_fG3)GB#S&F2Jal"4\ddS\>g`#AKlmkYN.%> l`7f(lsgLC:jat8UMl78SkT.a1gi6@Fk%Wj)%&D7CeGF4UDoEK+h=hqD\NND&5UEe !raJ3I.qKgo6D*1m=c>EeZE>I^T'_l2IX5hp/-5N1Vo7ilY qH`b')CkXkA]PA`dZl3L(kn90jn@0imI)T7Q=FcJjj5JJk%!ZB@OP"b2`8fRDRLHc D:[NV4AHNT/8E2&h^^#r3q)N[=hATL+CV1,FRVN=*i&1j20l@&SCU1XgCUN(fdBiM 4LUA$IM-.-6$kK5Hf!K>3TN\0=jL! &f[/0'W)WH^(JK?ik>G*bNM_E3_/92!%FV]ATH9?K:Z(A^UDc^j;W>]I$s)@DBi:n2g7BZO[CRnGPsmGL-0lGW?\[p ]kVko7\Ni"P=`!AIXKXp.,:X_CKqM5OD+6_HO#sIo094Ol$d!F[D&1LQ>:/^(ZQ)" @/n$._M,VVkket#a%hDkB_Ha*jQ`qdr#<6H%$ehFjpiHEaq^H @:KS(ROHJY9kkk=JBHC"F"1=bfYWXM9d :Fc,%NB'?-? ]^)1:l&Z]s,Uq,*&2H \(,%HOb94VN)!h7=P@SDAsHM5"UAS+pW+R[QNFaE#+&9V47$./]S/>#`Cj"QM& 5J!kqqq(f2rdB:2SoW_0:"^kp2lm\$^%U:-^!=sZ]3W%^gH=4QgX1Af<=M_CSd(bj \^T7s-tg,tnu%kYCm?(,htPKnJ! B\4dBWNO_'D3Ua$[! rrATH?S*9nf35`]WnoQa'SThYWTjNqVQEY$0G&J(`Ga6I[Jhh239G#43oV5H%S25? This interferometer employs a common-path configuration and heterodyne detection, by which fringe errors due to laser … +5"[;mAG9!Bcatm4qp2>r*JF?+Or2lH29;,I7+ (3`gb When d is exactly an integer number of half … )-A)o-C1g$9!0q2/_PsX]&,NGos8rnE&L"YWT7U9=KY+ 'IS3c.fAcc1sId>+Hnp@5B'V!&3nb-^W9k=IV\a
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