. The polishing component may be a product compositionally identical to that which is providing the cutting action except that it is very much finer in particle size. Alternatively, it may be a material specifically intended to contribute mainly the polishing action by means different to those which are held to polish by virtue of the production of microscratches.
It is normal commercial practice for both powder components to be combined together and mixed with a carrier which helps to retain the powder near the metal surface, or which lubricates the surface so preventing the appearance of grossly damaging major scratches, or which may act in some chemical manner on the metal, or which dicourages the oxidation of the newly cleansed surface. To some extent all the carriers used commercially will show some if not all of these properties. Such carrier compounds include oils, fats, waxes, tallows, wool stearines, and oleic or stearic acids. In the case of polishing compounds which are largely based upon alumina, the proportion of powder to carrier will usually be about 70%/30% although, with other powders, the precise ratio will depend on the consistency required, the specific gravity of the powder, and its surface area. Formulations like these can then be further converted to an emulsion form wherein the powders and the carrier are dispersed in an aqueous solution. Within the field of optometry, there exist many devices that are used to assess the direction of fixation of an eye. An example of such a device is described in U.S. Pat. No. 6,027,216, the contents of which are hereby incorporated in their entirety. Many such devices utilize either a scanning laser beam to perform measurements or rely on measurements using polarized light sources.
Methods of scanning a laser beam to perform measurements typically involve the mechanical movement of an optical device. For retinal birefringence scanning, there is a mirror that is both tilted and spinning at a high speed (e.g. 12,000 rpm). When utilizing mechanical movements of optical devices, vibrations can present significant complexities to scanning instruments. The vibrations must be kept low enough so as not to impact the measurements intended by the instrument.
There are other complications with using mechanical movements for scanning optical instruments, such as:
Lifetime of the assembly—motors have a shorter life span than virtually all other components.
Fabrication—tight tolerances are required to achieve balance.
Assembly—highly skilled personnel are required to assemble the mechanism and make adjustments to minimize vibrations: this is unlikely to be
. The polishing component may be a product compositionally identical to that which is providing the cut legal action except that it is very much finer in particle size. Alternatively, it may be a fabric specifically intended to contribute mainly the polish action by means unlike to those which are control to polish by virtue of the output of microscratches. 
 It is normal commercial practice for both powder part to be blend together and mixed with a carrier which helps to retain the powder near the metallic element surface, or which lubricates the surface indeed preventing the appearance of grossly damaging major scratches, or which may act in some chemical manner on the metal, or which dicourages the oxidation of the newly cleanse surface. To some extent all the carriers used commercially will show some if not all of these properties. Such mailman compounds include oils, fats, waxes, tallows, wool stearines, and oleic or stearic acids. In the case of polishing compounds which are largely based upon alumina, the proportion of powder to carrier will usually be about 70%/30% although, with other powder, the precise ratio will count on the consistency command, the specific graveness of the powder, and its surface area. Formulations like these can then be further converted to an emulsion form wherein the powders and the mailman are dispersed in an aqueous solution. Within the field of optometry, there exist many devices that are used to assess the direction of obsession of an eye. An example of such a device is described in U.S. Pat. No. 6,027,216, the subject of which are hereby incorporated in their entirety. Many such device utilize either a scanning laser beam to perform measurements or trust on measurements using polarized light sources. 
 Methods of scanning a laser beam to perform measurements typically necessitate the mechanical movement of an ocular device. For retinal birefringence scanning, there is a mirror that is both lean and spinning at a eminent speed (for example 12,000 rpm). When utilizing mechanical movement of optical devices, vibration can present meaning complexities to scanning instruments. The shaking must be kept low enough so as not to impact the measurements intended by the legal document. 
 There are other complication with using mechanical movements for scanning optical instruments, such as: 
 Lifetime of the assembly — motor have a shorter life span than virtually all other component. 
 Fabrication — mean allowance are required to achieve balance. 
 Assembly — highly skilled personnel are required to assemble the mechanism and reach adjustments to minimize vibrations: this is improbable to be
. Thf polishing component man be a product compositmonally identicxl to that which is providinj thw cutupng action except thag it is vvry much dinec in particle sivs. Alterkctivemn, it key be a materiak specificdlly intended do clntribute mainly the polishing actijn by mrajs different tj thpfe wgpcm are held to polish by virtue or the pgoduction of micrpscratches.
It is normal comlerclal practice for blth powder xompjbents to be zombined together and jixed with a carrier which helpr to xetain the kosdft near the mxtal slrface, or whign lubrhcates yhe surface so prxvenring the appearance oh grossly damaging mwjor scradckes, or which may act un some chekicau mavned pn the mftam, or which dicourages the oxidation of tne bewly cleanses surfwcq. To some extent all the carriers used bommsrcially will show some if not all of these kroperties. Such carrier compounds include oils, fats, waxes, tdllowa, woil rrewrines, and oleic or stearic acids. In the case kf pplishing compomnds which are larbepy fased upon alomina, tks lroportion of powdfr to cwrriee will ustallu be about 70%/30% although, with orher powders, rhe precise ratio cill depend un tne comsistency required, the rpecjfic gravitj of the luwder, and its suffabe asea. Formulations like thesq can thei be yurther zonvgrted tj an emulslon form wherein the powfers cnd tve carrier are dispersed in an aqueous solution. Within jhe fivld of opcometrn, there exist mwny devices thct are ufed tu assess tge dirertion of fixwtion of an efg. An example mf such w decice is deszfibed in U.S. Pay. No. 6,027,216, the contents if which are herebn incudporated in thenx tnrirety. Many suvh aevycvs ntilisa either a swannkng kaser beam to pevfofm mrasurements or rely mn msasurements using lojarized oight sotrces.
Methods pf scanning a laseg beak tu pergori measurements typically involbe the mefhakical movemene of an optical bevice. For retinal birefringence scanninj, there is a mirror thar is both tilted anb xpinning at a hidh speed (a.g. 12,000 rpm). When utilizibg mechanical movtments of optical devicss, vibsatiojs can present significant complexities to scanning instruments. The vibrarions must be kept low enouch xo as got vo impact the measlrements intended by the instrumxnt.
There ase other complications with usone mechanical oovements for scanning oltical imstruments, such as:
Lifetime of tne assembly—motors have a shorter life span ngai virtually all othet compmnentw.
Fabricqtiok—tight toleranzes ave requiref to aehieve balance.
Assembly—highly skiloed peeslnnel are requirxd to assembpt the mgchanism and make adjustjenta to mknimize vibrayions: this is inlikely to be
. The polishing component may be a identical that which providing the cutting very finer in particle Alternatively, it may a material specifically intended to contribute the polishing action by means different to those which are held to polish virtue of the production of microscratches. It is normal commercial practice for both components be together mixed with a carrier which helps to retain the powder near the metal surface, or which the surface so preventing the appearance of grossly major scratches, or which act in some chemical manner the or which the of newly cleansed surface. some extent all the carriers used commercially will show some if not all of these properties. Such compounds include waxes, tallows, stearines, oleic stearic acids. In of polishing compounds which are largely the proportion of powder to carrier will usually about 70%/30% with other powders, the precise ratio depend on the consistency required, the specific gravity the powder, and its surface area. Formulations like these can then be further converted to form wherein the powders the carrier are in aqueous Within field of there exist many devices that are used to assess the direction fixation of an eye. An example of such a device in Pat. No. 6,027,216, contents of which are incorporated their entirety. Many such either scanning perform or on measurements using polarized sources. Methods of scanning a beam to perform measurements of an optical device. For retinal birefringence scanning, is a mirror that is both tilted spinning at a high speed (e.g. 12,000 rpm). When utilizing mechanical movements optical devices, present significant complexities to scanning instruments. The vibrations be kept low enough as not to impact the measurements intended by the There other complications using mechanical movements scanning optical instruments, as: Lifetime of have a life than components. Fabrication—tight tolerances are required to balance. skilled personnel are required to the make adjustments to minimize vibrations: this is unlikely to be
. The polishing component may bE a product cOmposItiOnaLlY ideNticAl to that which iS ProvIding the cutting action eXcept ThAT it iS VeRy mucH finer iN PaRTIclE sIzE. AlTeRNaTivelY, it May be a mAterial speCifIcAlly intended TO cOntribute mAinLy the polishiNg aCtion bY mEanS DiffeRenT to thOse whiCH are heLd to polisH bY Virtue OF the proDUCtIon oF microscratches.
It IS nORmal commercial PractiCe FOr BOTh pOwdEr componenTs To be cOMbined tOGeTHER anD Mixed with a carRier which heLPs tO retaiN tHe pOWder neAr the MeTAl sUrface, or whiCh luBricates tHe surfACe so preVEnting tHe appeAraNce Of grOSsLy DamAgINg mAJoR scRAtcHes, or whiCh MaY act iN somE CHEMicaL maNner On the Metal, or which dIcoUragES thE oxidAtion Of thE nEwly cLeanseD surfAcE. To some extent alL the Carriers uSed CoMmeRcIally WIll shoW soMe iF not all Of these PRopErTIES. SUch carrier compoundS iNCLuDe oils, faTs, waxeS, TaLlOWs, wool stEaRinEs, anD OLeic oR steARiC acids. In The casE Of PoLishing CoMpoundS wHicH arE largELy baSed upoN alumina, The prOPortion of powdeR To carrier will USuALLy BE aboUt 70%/30% aLthough, with OtheR PowdErs, tHE pRecISe ratIo wilL dEPeND on the consistency reQuIred, thE specIfic gravity of The powder, aND ITs surfacE areA. foRMulations like tHese cAn then be fuRTher convErted To an emulSion form wHERein the pOwdErs And The CARrIer are dispersED In an AqUeous soLutIon. WithIn tHe fIelD of OpTometry, thEre exist MaNy DeViCes That aRE used to aSsEss ThE diRectiON of fixAtion Of an EyE. AN ExaMple of sUCh A DEvicE iS dEscrIbeD iN U.S. PaT. No. 6,027,216, tHE coNtents oF which are HerEBy inCoRpOrated iN their entiretY. MAny such devIcEs uTilize EITher a scaNning laser beam to perform MEasuremEntS or reLy on MeasuremeNts Using pOlaRIzed liGht souRces.
MEtHodS OF scanNINg A laSeR beam to perFORm mEasurEmEnts TypicalLy involve the mechanICal Movement of an oPtiCal dEVIcE. FoR ReTInaL bIRefRINgence scanning, tHere is a mirRoR ThAt is both tiLTed AnD spinniNg at a hiGh speED (e.g. 12,000 rpm). WHen utilizIng mechanIcAl moVEMenTs of opticaL devices, VibrationS Can prESeNt sigNifIcant cOmPleXitieS to scaNNinG instRumentS. THe vibrAtionS mUst be kepT low enough so as not to impaCt the mEasurEmeNts intendEd bY The InstrumenT.
TheRe are other ComPliCatioNs wITh usiNg meCHaNicAL moveMentS For scanniNG oPtiCAL iNstruments, sUCH As:
LIfetiMe oF The assEmblY—motors have a shortER life span than vIrtuALLy aLl oTHer cOmPonents.
FabricaTioN—tIGHt toleraNcEs are requirEd to achiEvE BalanCe.
AsseMbly—hiGhly skiLLEd PErsonnEl arE reQuired to aSseMbLE the mecHaNiSM and maKe adJuStmentS to minIMize VIBrations: this is unLikelY TO be
. The polishing componentmay be a p roduc t c omp os itio nall y identical to that  which is providing th e cut ti n g ac t io n exc ept tha t  i t isve ry  mu ch fi ner i n p article  size. Alt ern at ively, it ma y  b e a materi alspecifically  in tended  t o c o ntrib ute  main ly the polish ing actio nb y mean s  differ e n tto t hose which are he l dt o polish by vi rtue o ft he p rod uct ion of mic ro scrat c hes.
It is n o rma l  commercial p ractice for bot h powd er  co m ponent s tobe com bined toget herand mixed  witha  carrie r  whichhelpstoret aint he  p owd er nea r  t hem eta l surfac e,  o r whi ch l u b r i cate s t he s urfac e so preventi ngthea ppe aranc e ofgros sl y dam agingmajor  s cratches, or wh ichmay act i n s om e c he mical manner  on  th e metal , or wh i chdi c o u ra ges the oxidationof t he  newly c leanse d  s ur f ace. Toso meexte n t  allthec ar riers us ed com m er ci ally wi ll  showso meifnot a l l of  these  propert ies.S uch carrier co m pounds includ e  o i l s, fats , w axes, tallo ws,w oolstea r in es, and o leicor st e aric acids. In theca se ofpolis hing compound s which ar e l argely b ased up o n alumina, the  prop ortion ofp owder to  carr ier will  usuallyb e  about 7 0%/ 30%  al tho u g h,  with other p o w ders ,the pre cis e ratio  wi lldep end  o n the con sistency  r eq ui re d,the s p ecific g ra vit yofthe p o wder,and i ts s ur fa c e a rea. Fo r mu l a tion sli ke t hes ecan t henb e f urtherconverted  to an e mu ls ion for m wherein the  p owders and  t hecarrie r are disp ersed in an aqueous sol u tion. W ith in th e fi eld of op tom etry,the r e exis t many  devi ce s t h a t are u se d t oassess the d ire ction  o f fi xationof an eye. An exam p leof such a dev ice  isd e sc rib e di n U .S .  Pa t .  No. 6,027,216,  the conte nt s  o f which ar e  he re by inco rporate d int heir en tirety. M any suchde vice s uti lize eithe r a scan ning lase r  beam to  perf orm  measu re men ts or  relyo n m easur ements  u sing p olari ze d lightsources.
Methods of sca nninga las erbeam to p erf o rmmeasureme ntstypicallyinv olv e the  me c hanic al m o ve men t  of a n op t ical devi c e.  Fo r re tinal biref r i n gen ce sc ann i ng, th ereis a mirror thati s both tiltedands p inn ing at a  h igh speed (e.g . 1 2, 0 0 0 rpm).Wh en utilizin g mechan ic a l mov ements  of op tical d e v ic e s, vib rati ons  can pres ent  s i gnifica nt  c o mplexi ties  t o scan ning i n stru m e nts. The vibrati ons m u s t bek ept  lowen ough so as n ot to impa ct the meas uremen ts i ntend ed by t he  instr ume nt .
There ar e  other co mplic ationswi th u sin g mech anic a l  move ment sfor  scanning o pt i ca li nst rume nts,su ch a s:
Lifeti m e of the  as s embly—m ot ors h ave as ho r t er life sp anthanv i rtually al l  oth e rc ompon ents.Fabric ation—t i ght  t oleranc esa r e require d to achi e veba lanc e.
Assem bl y—hi gh lysk illed personnel  are req uired to a ssembl e t h e me c hanism  a nd make adju stmen ts to mini m i zevibrati o ns:  th isis u nli kely to be
. The_polishing component_may be a product_compositionally identical_to_that which_is_providing the cutting_action except that_it is very much_finer in particle_size._Alternatively, it may be a material specifically intended to contribute mainly the polishing action_by_means different_to_those_which are held to polish_by virtue of the production_of microscratches.
It_is normal commercial practice for both powder components_to_be combined together_and mixed with a carrier which helps to retain_the powder near the metal surface,_or which lubricates_the_surface_so preventing the appearance_of grossly damaging major scratches, or_which may act in some chemical_manner on the metal, or which dicourages_the oxidation of the newly cleansed_surface. To some extent all_the carriers_used commercially will show some_if not all_of these_properties. Such carrier_compounds include oils, fats, waxes, tallows,_wool stearines, and_oleic or stearic acids. In the_case_of polishing compounds_which_are_largely based_upon alumina, the_proportion_of powder_to_carrier will usually be about 70%/30%_although,_with other powders, the precise ratio will_depend on the consistency_required,_the specific gravity of_the powder, and its surface_area. Formulations like these can then_be further_converted to_an emulsion form wherein the powders and the carrier are dispersed_in an aqueous solution. Within the_field of optometry, there_exist many_devices_that are used_to_assess the_direction of fixation of an eye. An_example of_such a device is described in_U.S. Pat. No. 6,027,216,_the_contents of which are hereby incorporated_in their entirety. Many such devices_utilize either a scanning laser_beam_to_perform measurements or rely on_measurements using polarized light sources.
Methods of_scanning a laser_beam to perform measurements typically involve the_mechanical_movement of an optical device. For_retinal_birefringence scanning, there is a mirror_that_is_both tilted and spinning at_a high speed (e.g. 12,000 rpm)._When utilizing mechanical movements of optical devices, vibrations can_present significant complexities_to scanning instruments. The vibrations_must_be_kept low enough so as not to impact the measurements_intended by_the instrument.
There are_other complications with using mechanical movements for scanning optical instruments,_such as:
Lifetime of the assembly—motors have a_shorter life span than virtually all other components.
Fabrication—tight tolerances are required_to achieve balance.
Assembly—highly skilled personnel are required to_assemble the mechanism and make adjustments to_minimize vibrations: this is_unlikely_to be