DALA is a customer-orientedcompany,creating values forthe
industries througheffective application of newtechnologies.DALA
workstogether with customers tocreate better performance andhigher
quality products, doingour bit to people' 100 milives. In-house Production Lines & Proprietary Intellectual Property We know well 3 types of outside diameter measurement technologies Fraunhofer diffraction measurement principlelaser is aligned into a parallel light beam by collimator lens to
catch the object on the light path. Diffraction image of the object
will be projected on CCD sensor by the imaging system. Then the
object dimension can be accurately calculated by analyzing and
calculating the diffraction fringe. Telecentric optical measurement principleWhen the object is caught by the laser beam passed through lens, a
bright and dark area will be formed on CCD. Then object dimension
will be accurately calculated by detecting the bright and dark
edges and software analysis. Fresnel diffraction measurement principleAdopt CCD array sensor and pulse laser light source, calculating
object dimensions by directly analyzing object diffraction waveform
distribution characteristics. Length meter measurement technologyInterference fringe light spot is generated when two laser beams
intersect on the surface of the object. The interference fringe
modulates the scattered light from the object, which frequency is
positively correlated with the object's velocity. Digitization information system to process the fringes, combines
with software to analyze and calculate object velocity and length. Drawing die measurement technologyBased on optical imaging technology, 3D reconstruction of drawing
die inner holes can be achieved through optical scanning, which can
measure bearing variation, inclination, bearing length, ovality
,reduction cone angle .,etc. | 
