Kalle KUIVALAINEN, Antti OKSMAN, Mikko JUUTI¹, Kari MYLLER², and Kai-Erik PEIPONEN^*

Department of Physics and Mathematics, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland
¹VTT Technical Research Centre of Finland, Optical Instruments, P.O. Box 1199, FI-70211 Kuopio, Finland
²MGM-Devices Oy, Ltd., Parrutie 25, FI-80100 Joensuu, Finland

(Received August 26, 2009; Accepted December 30, 2009)

In this paper, we present three new types of diffractive-optical-element (DOE)-based glossmeters (DOGs) that have been developed for both laboratory and online local specular gloss measurements of objects in industrial processes. The three are denoted as the handheld wireless glossmeter, μDOG two-dimensional (2D) and μDOG one-dimensional (1D), respectively. These glossmeters are designed to operate under conditions where gloss measurement with conventional glossmeters is impossible or difficult, or when fine structures of the gloss over a surface are an issue. Here, we show the applicability of the handheld glossmeter and μDOG 2D in the inspection of gloss from rough stainless steel plates finished by different machining methods. We also briefly introduce the concept of online gauge μDOG 1D for gloss assessment in industrial measurement environments.

Key words: specular gloss, glossmeter, diffractive optical element, quality inspection, online gloss measurement

^*E-mail address: kai.peiponen@uef.fi