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5-inch high-resolution aerial display by use of retro-reflector and a Fresnel lens
Get PDFText学術雑誌論文 / Journal ArticleAerial displays form real images in mid-air and realize a non-contact user-interface. However, the aerial images are significantly blurred compared to the light source images due to ray shift, diffraction spread, and scattered light by the optical elements. Lens-enhanced aerial imaging by retro-reflection (LeAIRR) optical system reduces the ray shift, diffraction spread, and scattered light and forms high-resolution aerial images. This system consists of a light source display, a beam splitter, a convex lens, and a retro-reflector. The size of the aerial display based on LeAIRR optical system depends on the size of the lens. However, large-size convex lenses made of glass are difficult to manufacture. In this study, we propose a 5-inch size high-resolution LeAIRR optical system that utilizes a Fresnel lens (Fresnel LeAIRR) that magnifies the light source image on the retro-reflector. The Fresnel lens is positioned so that the aerial image and the retroreflector are conjugated to reduce the effects of diffraction and the ray shift effects. The modulation transfer function (MTF) of the proposed optical system is superior to the conventional AIRR optical system.Copyright 2025 Society of Photo‑Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, and modification of the contents of the publication are prohibited.journal articl
Implementation of Blended Learning in Teacher Education : A Survey-Based Study on the Perception of Subject-Specific Value and Enhancement of Critical Thinking Skills
Get PDFtext紀要論文 / Departmental Bulletin PaperThis study investigated the effects of blended learning in six university courses using a questionnaire-based approach. A combined analysis of the data from these courses revealed the following: There were improvements in the "Interest Value" and "Personal Gain Value" scores on the Scale for Subject-Specific Value, as well as in the "Decision Making," "Open-mindedness," "Understanding of Key Points," "Authenticity," "Diversity Understanding," and "Understanding of Others" scores on the Critical Thinking Disposition Scale. Additionally, there was an increase in question-asking attitude scores following the blended learning experience. Furthermore, when participants were grouped based on their initial critical thinking disposition scores, those with initially lower scores showed significant improvements in "Personal Gain Value" after engaging in blended learning.departmental bulletin pape
