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CRITICAL MEASUREMENTS Jenoptik delivers solutions by customizing technology


from its available platform of devices with customer specifi c programming and fi xturing provided. “Every customer has different technologies, parts, features to be measured and different production processes, even materials,” he said. “We try to standardize on a very strong CNC platform of devices as a backbone while we work individually to deliver tailored solutions,” he said. “We continue to deliver a number of hand-held gages.”


Noncontact and Optical Applications There are a number of reasons for choosing a non- contact, optical method. One is fear of damaging a pristine surface, such as in medical implants, optical systems, or precision engineered components in the fuel injection system of an engine. Another reason is the extremely small size of some components, such as surgical stents, fuel injectors, and implantable medical devices to name a few. “All of the stylus style of tools need a certain length to actually make


a measurement,” explained Manas Lakshmipathy, business development manager for Polytec (Irvine, CA). “If you look at some biomedical components, or even some fuel injection components, the surface area is so thin that dragging a sty- lus does not make any sense anymore. In some instances, it is not even possible—you need an optical, 3D system to give you quantifi able results.”


Mahr has started moving data with Android smartphones with its MarSurf One app. It can be used to connect to the MarSurf line of surface measurement devices.


Polytec supplies surface measurement equipment that uses scanning white-light interferometry, also called coherent or vertical scanning interferometry. According to Lakshmipa- thy, data is collected to nanometer scale accuracy in 2½ dimensions by moving the objective lens of a camera over a surface. The collected light is split, with one beam refl ected off a reference mirror. Matching the phase of the two beams provides the needed depth information. Software is crucial to utility. “The software passes through only the surface charac- teristic such as roughness, waviness or form, making adjust- ments to compensate for the part placement” he explained. “A signifi cant advantage of the TopMap form products


[Metro.Lab, Pro.Surf and In.Line] is the telecentric optical design that allows measurement of deep seated surfaces. Typical microscope-based systems are challenged by these measurements because the light does not refl ect back, but


70 AdvancedManufacturing.org | June 2016


Photo courtesy Mahr Federal


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