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Measurement and Analysis of MTF and its Contribution to Optical Dot Gain in Diffusely Reflective Materials

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The optical performance of printed matter on diffusely reflecting substrate is governed by two factors: 1) Optical dot gain due to lateral spread of light within the substrate and 2) ink spread caused by physico-chemical interaction of ink and substrate. There are a limited number of studies analyzing these factors separately. In this paper we focus on the optical dot gain aspect by measurement of lateral distribution of light, i.e. the point spread function (PSF), and its analysis in terms of the modulation transfer function (MTF). Separating the two contributions, optical dot-gain from ink spread, is necessary for realistic simulation of the inkjet printing process, which is then used for printed image quality performance comparison (e.g. optical system models, virtual image chain approach, etc.). The PSF measurement methods applied can also be used for other reflective display materials in general since they do not make use of the printing process as investigated in many of the available studies. In this study we report the optical characteristics of typical substrates used in inkjet printing industry and mention examples of possible applications.
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Document Type: Research Article

Publication date: 01 January 2007

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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