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Optical appearance measuring device (Parousiameter)
The attractiveness of almost all industrial products is strongly governed by the visual quality and appearance of their finish. Also the product’s functionality may often be judged by aspects of its visual appearance such as colour, gloss or texture and lately, holographic and other interference effects. Appearance is recognised as a property that determines an important part of the human interface. The usual way to assess the overall appearance is by a trained person to examine the surface visually under standardised illumination. It is literally in the eye of the beholder and thus subjective. With the Parousiameter it is now possible to capture all important optical characteristics of a surface in a second. It works by measuring the full hemispherical reflection or transmission of a light distribution.General description Parousiameter optical measuring device characterises appearance (parousia meaning greek language) works full hemispherical reflection transmission light distribution functionality just classical photogoniometer difference measurement seconds rather hours self luminous devices LEDs behaviour optically active LCDs dichroic filters collimator structures prismatic foils typically measures far-field distributions visible near-field details product surface integrated complimentary seen eye white coloured 10 mm spot mimic human vision Typically flat samples laser source 05 curved surfaces measured Small large products CCD camera simple rugged optomechanical basically parts unlike sequential photodetector complicated precision intelligent software flexible revolutionary approach characterisation high-end table instrument (footprint 04 m2) fraction price smaller portable (typically 30 cm) coupled laptop PC

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