Measuring Principle
The internal stress of glass and plastic products has a birefringent characteristic. In other words, if there is stress inside of these types of products, light from he polarized lamp will be divided into different units, which produce optical interference phenomenon(ripple patterns) in turn.
Under white-light lamp, you can see aubergine ripples, which is caused by the presence of stress.
From the observation of colored patterns, you can see stress distribution directly, then evaluate and improve the annealing process.
The inspection of plastic molds is more complex as the colored patterns cased by stress is irregular. A similar situation may occur with glass products, which is called stress stretching. For example, a qualified mold will have a large amount of stress released by tension.
The role of full-wave plate :
When testing glass samples without the full-wave plate, usually only black or gray shadow patterns can be seen. The full-wave plate increases or decreases the full wavelength of a phase difference, thereby forming a colored pattern, which is easier to analyze.
Fsm-60LE glass surface stress tester Product name: fsm-60LE glass surface stress tester Supply ability: 100 Specifications fsm-60LE Price term: fob Port of loading: shanghai Minimum order 1 Unit price: negotiable Fsm-60LE accurate measurement of chemical and heat-resistant glass surface stress. Birefringence in the measurement principle is very important. Sodium lamp as light source, measurement pattern is very clear. The chemical products suitable for measuring the stress and the surface of tempered glass containers depth. Original packing.
Surface stress meter fsm-6000LE Thisfsm-6000LE is developed for measuring surface stress of glass with pc. Chemical and thermal tempering is increasing the areas of glass application in most of industries. The optical waveguide effect in the surface layer of temperd glass is a useful tool for measuring surface stress for quality and process control purposes. Fsm-6000LE suitable for measuring chemical and heating glass, automatic detection through a computer. Detection of the man-made computers to reduce the error. Under normal circumstances, complex testing needs to come to the calculation of stress, but the automatic measurement of not only save time, computer products, are preserved by the relevant inspection data. Specification: Range:0-1500mpa Accuracy:20mpa Light source:sodium lamp Sample:chemical tempered glass Sample:thermal tempered glass Sample size: flat over1010 Prism: nd=1.72 Power source:ac100v 3a Sample size: flat over10*10MM
Lsm-901 glass surface stress tester Lsm-901 applied to the glass surface stress test, stress range of 100-1500 mpa (mn/m2). Lsm-901 usually semi-tempered glass measuring the stress and measurement process is very fast. Compact design aesthetic appearance, when used to install a battery, can be measured anywhere. Lsm-901 through the appropriate replacement eyepiece micrometer, the chemicals can be heated glass for testing. Original packing
The Strain viewer ( Ref.PSV-202) has been designed to observe and analyze the internal stress of preform and other plastic products . Detecting object 1. Preform ( Color and colorless types ) 2. Other transparent plastic products Plastic molds , plastic bottle , cosmetic bottle , beverage bottle, plastic tray, plastic film ., etc Specifications Analyzer : diameter 100mm Viewing field: 200mm*200mm Measuring height :236mm Overall size: 310*285*350mm Voltage: 24VDC( with a AC/DC adaptor ) Light source: White fluorescent lamp Weight:8KG Measuring Principle The internal stress plastic products has a birefringent characteristic. In other words, if there is stress inside of these types of products, light from he polarized lamp will be divided into different units, which produce optical interference phenomenon(ripple patterns) in turn. Under white-light lamp, you can see aubergine ripples, which is caused by the presence of stress. From the observation of colored patterns, you can see stress distribution directly, then evaluate and improve the annealing process. The inspection of plastic molds is more complex as the colored patterns cased by stress is irregular. A similar situation may occur with glass products, which is called stress stretching. For example, a qualified mold will have a large amount of stress released by tension. The role of full-wave plate : The full-wave plate increases or decreases the full wavelength of a phase difference, thereby forming a colored pattern, which is easier to analyze.
Function 1.Observe stress distribution in transparent plastic, glass products and optical crystals 2.Measure retardation caused by internal stress in glass and optical crystals Detecting object 1. transparent glass products with complex construction. such as : penicillin bottle, ampoule , mobile phone cover, light tube, light bulb,solar glass ,automobile glass,sapphire, glass container , glass handicraft 2. transparent plastic samples plastic bottle , cosmetic bottle , beverage bottle, contact lenses, plastic tray plastic film 3. optical crystals such as quartz , SiC, calcium fluoride Detecting methods Sensitive Color Method and Senarmont Method Specification Model PSV-413 Size W291 D384 H388mm Measuring range 0-280nm Weight 11Kg Viewing field W200 D200mm Measure height Max259mm Light Source Warm white LED light 10W Power DC 12V(with a AC/ DC adapter) Others: 1.Polarizing light field intensity : 120cd/m2 (10W LED lamp) 2.Polarization degree of the polarizing material: 99% 3.Polarization field: 200*200mm 4.Instrument structure: a 1/4 wave plate in the analyzer and a full-wave plate in the polarizer (wavelength 565nm). Slow axis of the plate is at 90 to the polarization plane .5.A dial on the Analyzer is used to measure the rotating angle (range: 0-180 )
Principle : Polarization interference Specifications : Viewing field: 200* 200 mm Overall size: 300*335*330 mm Main voltage:220 V AC Measuring space height : 234.5 mm Light source: LED ( White and Sodium light) Gross Weight : 10KG Packed in 1 carton : 45*45*32cm Application area This Polariscope is designed to observe and analyze the distribution of internal strain in transparent plastic preforms. It has been widely used in the quality control of various plastic rough processing products and finished bottles. Features 1.Defects invisible to the naked eyes such as crystallization or other common defects become visible ; 2.When the plastic preform is placed on the Polarizer at a 45 angle, the colored birefringent stripes at the edge of the preform can be observed; 3.When the plastic preform is placed on the polarizer at a 0 or 90 angle, black birefringence stripes in the central part of the preform will be displayed; 4. In addition to white light, Sodium light is also used to test colored preforms or finished bottles; 5. Besides , this Strain Viewer provides 12 kinds of defect analysis functions. 12 kinds of colored defect comparison pictures will be attached to instruct related improvements in preform production process.
The Polariscope ( Ref.PSV-202) has been designed to observe and analyze the internal stress of transparent glass and plastic products . Valued customers : Lock & Lock , Heraeus , Ferrotec Detecting object 1. transparent glass products with complex construction. such as : penicillin bottle, ampoule , mobile phone cover, lighting tube, solar glass ,automobile glass,sapphire, glass container , glass handicraft 2. transparent plastic samples plastic bottle , cosmetic bottle , beverage bottle, plastic tray, plastic film 3.Crystaline material Specifications Retardation of full-wave plate : 560nm Viewing field: 200mm*200mm Measuring height :236mm Overall size: 310*285*350mm Voltage: 24VDC( with a AC/DC adaptor ) Light source: White fluorescent lamp Weight:8KG
