适用范围:l适合于检测灯等有复杂构造的产品。l检测高密度的塑料产品,如隐形眼镜等。l检测光学晶体,如氟化钙(萤石)等。参数:型号LSM-4401、LSM-4403尺寸W295×D375×H460mm重量12KG测量方法1.CrossedNicols观测法2.SensitiveColorMethod感光色检测法3.SenarmontMethod补偿法测样有效长度W200×D200mm光源荧光灯电源交流100V、220V附件应力方向确认棒清洁液1瓶波长检板2个1.CrossedNicols观测法2.SensitiveColorMethod感光色检测法3.SenarmontMethod补偿法温度补偿法可以进行应力定量分析检测。整个视野范围是黑色的,不旋转分析仪,既能观测出最亮点即应力最大点。旋转分析器,记录角度,即可用公式换算出应力值。观测图像如下ExampleofAppearanccvnderFlowingStateofResinUnevennessofFilmStrainresultedfromProcessingStrainandcracksinamoldedarticleSamplewithsubstantiallynostrainThewholeofasampleappearsdarkinblackishcolorsimilarlytothevisualfield.SamplewithlessdegreeofstrainOuterperipheralregionofasampleappearsinwhitishcolor.SamplewithgreaterdegreeofstrainRegioninwhitishcolorintheouterperipheryofasample,wherestrainexists,extendsinwardly.Also,thewhitishregionappearsbrighterthanasamplewithlessdegreeofstrain.SampleattheReferencePosition/RotatedAngle0X-shapedregioninthetransmissionaxisdirectionofapolarizerorananalyzerappearsinblackishcolor.Samplerotatedby45X-shapedregionappearedinsensiblecolorremainsinthesamedirectionirrespectiveofthedirectionchangeofasample.Duetothis,thepatternofstrainvaries.Samplerotatedby90Patternofstraininasampleissameasthatofasampleatthereferenceposition.IntheSensitive-ColorMethod,thewholevisualfieldisseenforthereddishpurplecolor.Thiscolortoneiscalledsensitivecolor.Thepartwiththestrainchangesingreenbluecolorandorangeyellowcolor,whentheobservationsampleisputin,andthestressconfirmscompressivestressortensilestress.Thepartwithoutthestrainisseenforthereddishpurplecoloraswellasthewholevisualfield.Stress-direction-determiningbarwithnostrainStress-direction-determiningbar<Acryl>havingstrainStress-direction-determiningbar<Glass>havingstrainThewholebarappearsinreddishpurple(sensitivecolor)similarlytothecolorofvisualfield.Whenforceisappliedwithfingerstoabar,stressintensionisliberatedinthedirectionindicatedbyarrows←→intheupperregionofthebar,whilestressincompressionisliberatedinthedirectionindicatedbyarrows←→inthelowerregionofthebar.Whenforceisappliedwithfingerstoabar,stressintensionisliberatedinthedirectionindicatedbyarrows←→intheupperregionofthebar,whilestressincompressionisliberatedinthedirectionindicatedbyarrows←→inthelowerregionofthebar.*Duetodifferenceinqualityofamaterial,suchasglassandacryl,theremayacasethattheforesaidrelativitybetweenthestressdirectionandthecolorchangecannotbeapplied.Inordertocarryoutaccuratedetermination,itisrecommendedtocheckcolorchangebeforehandwithabar-shapedsampleforpreliminarypurpose,whichismadeofthesamematerialasthatofasampletobeinspected.FlowingStateofResinUnevennessofFilmStrainresultedfromProcessingStrainandcracksinamoldedarticle.SamplewithsubstantiallynostrainColorofregioninouterperipheryofasample,wherestrainexists,changestogreenishandbluishcolorororangishandyellowishcolor.SamplewithlessdegreeofstrainArotatingframeofanalyzerisrotatedsothataregiontobeassayed(indicatedwithanarrow)getsdarker.SamplewithgreaterdegreeofstrainColorchangeofregionintheouterperipheryofasample,wherestrainexists,extendsinwardly.Also,theyellowishorbluishcolorappearsmoreintensiveandbrighterthanthatofasamplewithlessdegreeofstrain.SampleattheReferencePosition/RotatedAngle0OnlyX-shapedregioninthetransmissionaxisdirectionofapolarizerorananalyzerdoesnotcausecolorchangeandiskeptinreddishpurplecolor(sensitivecolor)similarlytothevisualfield.Samplerotatedby45X-shapedregionappearedinsensitivecolorremainsinthesamedirectionirrespectiveofthedirectionchangeofasample.Duetothis,thepatternofstrainvaries.Samplerotatedby90Patternofstraininasampleissameasthatofasampleatthereferenceposition.InSenarmontMethod,itisatestmethodforcarryingoutstrainquantitativemeasurement.Thewholevisualfieldisignorantlyseenfortheblack,whentheanglescaleoftheanalyzerisadjustedin0degrees.Theobservationsampleisputin,thepositionwhichseesthepartwhichwantstodeterminethestrainquantitativelythemostbrightissearchedandisfixed,whileitisrotated.Next,theangleisreadinthepositionthatitdoestheslowrotationofanalyzerrotatingframeandseesthemostversed.Therotationangleisappliedtocalculationformula,andthestrainamountisobtained.Still,thecalculationisunnecessary,becausethelookuptablewasattachedtogoods.ExampleofAppearanceunderInspectionRotatedAngleofAnalyzer0°RotatedAngleofAnalyzer7°Exampleofanglescaleofanalyzerpointingat7°RotatedAngleofAnalyzer0°RotatedAngleofAnalyzer11°RotatedAngleofAnalyzer28°Exampleofanglescaleofanalyzerpointingat28°RotatedAngleofAnalyzer0°RotatedAngleofAnalyzer20°RotatedAngleofAnalyzer35°RotatedAngleofAnalyzer0°1.CrossedNicols观测法树脂—流动状态薄膜---不均衡处理后的应力现象模具制品的应力变形.样品明显没有应力,呈现与视野等同黑色样品存在轻度应力,在样品外呈现微弱白色。样品外围存在很大应力,即呈白色的区域。并像里面扩张。白色明显比上一图片亮得多。样品在原位置,未经旋转。在偏光仪传送轴方向的X形状区域呈黑色样品旋转45°X形区域出现可见颜色,因应力变化了。旋转90°后,图案与在原位置时相同。2.SensitiveColorMethod感光色检测法应力及方向决定线无应力亚克力应力及方向决定线存在应力玻璃应力及方向决定线存在应力整条线均是微红-紫色(感光色),与其他部位颜色一致。当用手指按应力线位置时,如是张应力,应力释放的方向←→;如是压应力,应力释放的方向→←。当用手指按应力线位置时,如是张应力,应力释放的方向←→;如是压应力,应力释放的方向→←。由于产品原材料不同,如玻璃,亚克力等。上述关于应力方向的变化及应力产生的颜色变化效果,某些材料可能效果不特别明显。为了更加准确的测量,推荐预先测量与样品相同质量的杆状样品,观察其颜色的变化。树脂—流动状态薄膜---不均衡处理后的应力现象模具制品的应力.样品中不存在应力,但在边缘变绿色或蓝色或橙色或黄色的部位,存在少量的残余应力。样品存在轻度应力,重复旋转应力仪支架,确保充分的检测样品。变暗的部位存在轻度的应力。样品中存在大量应力,样品外围颜色变化的区域,存在向内扩张的大量应力。黄色及蓝色比上一图更亮,更明显。样品在原位置,未经旋转。只有在偏光仪传送轴方向的X形状区域并未发生颜色变化,和外部颜色一样。样品旋转45度X形状区域的颜色并没有变化,而应力图案发生了变化旋转90°后,图案与在原位置相同。3.SenarmontMethod补偿法分析器旋转0度分析器旋转7度分析器旋转0度分析器旋转11度分析器旋转28度分析器旋转0度分析器旋转20度分析器旋转35度分析器旋转0度旋转89度