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"Reflection (Optics)"
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Reflecting light
\"This book looks at what reflections are and how we can use them. - Mirrors reflect light back at exactly the same angle. You can make a \"mirror book\" to explore symmetry and multiple reflections. - Why does a straight straw look bent in a glass of water? Experiment using air, oil, and water to see how different materials affect the speed of light. - Look at how our eyes use reflected light to see and make a pinhole camera to show how the eye works. And much more!\"-
Book
Total Internal Reflection Fluorescence (TIRF) and Evanescence Microscopies
This book offers a complete presentation of the physics, math, and experimental setups for both TIRF and related evanescence microscopies, for both excitation or emission. It also discusses combinations of evanescence microscopies with numerous other microscopy techniques.
eBook
What are shadows and reflections?
\"What happens when light is blocked? How can we redirect light? Readers will discover the answers to these questions and more in this fact-filled title. Readers will explore the properties of transparent, translucent, opaque, and reflective materials, and learn how to redirect light beams and create shadows\"-- Provided by publisher.
Book
Harriet's reflections
When an old lion dies, his reflection finds someone new to follow--a little girl named Harriet, who finds she is much more ferocious with this new face in the mirror.
Book
Reflection Characteristics Measurements of Indoor Wireless Link in D-Band
For the millimeter wave (mm-Wave) and terahertz (THz) indoor wireless communication system, the reflection channels need to be characterized and modeled. In this paper, the reflection measurements of the parallel polarized wave are carried out under multiple incident angles and five kinds of materials in the D-band (110–170 GHz). A modified reflection model with two parameters estimated by the minimum mean square error (MMSE) criterion is proposed. The results show that the measurements are in good agreement with the proposed model. Furthermore, a set of measured properties is demonstrated and it can be concluded that both the reflection coefficients and relative permittivity gradually decrease, whereas the surface roughness increases slightly with the increasing frequency, indicating a weak frequency dependence. Interestingly, the concrete board with high surface roughness, which means more power loss in a specular direction, has the lowest reflection loss at a certain frequency and incident angle. It implies that the reflection characteristics of indoor building materials are determined not only by surface roughness, but also by many other factors, such as relative permittivity, frequency, and incident angle. Our work suggests that the reflection measurements of indoor D-band wireless links have a prospective application for future indoor wireless communication systems.
Journal Article
The other ducks
\"This Duck and That Duck get along swimmingly, but sometimes two ducks just aren't enough. Especially when you want to waddle in a line. On a bright sunny day, This Duck and That Duck gaze into the clear water of their pond and discover, to their surprise and delight, the other ducks. But what happens when the days turn cloudy and gray?\"-- Book jacket.
Book
An Iterative Deflectometry Method of Reconstruction of Separate Specular Surfaces
Phase measuring deflectometry (PMD) plays a more and more significant role in the measurement of specular surfaces. However, most of the deflectometric methods are only suitable for continuous specular surfaces, but not for the discontinuous surfaces. In this work, with the hardware of stereoscopic PMD, a mechanism is introduced so that a specular surface can be reconstructed iteratively with the pre-known coordinate of a reflecting point. Based on the mechanism and the excellent local properties of the B-spline surface, a reconstruction method suitable for both kinds of specular surfaces is proposed. Meanwhile, to resist the noise of the single point, this work mathematically analyzes the mechanism of the method. With the mathematical conclusion, the sparse point cloud solved using stereoscopic PMD is employed to scale the B-spline surfaces, improving the accuracy of reconstruction. Simulated and actual experiments are carried out, and the results show high accuracy and robustness of the PMD system and the reconstruction method.
Journal Article
Natural reflections
\"An inspiring and highly original book of photography takes the reader on an unforgettable walk through the vast and wide beauty of \"Natural Canada\". Natural Reflections captures natural beauty from the exceptional viewpoint and unique perspective of Mike Grandmaison's lens. A singular gallery of images is curated, amplified and informed by the observations of Robert L. Peters. Filled with insightful musings, truisms and parallel quotations from some of the world's greatest thinkers, this book is bound to inspire and truly engage both halves of the brain. Divided into five contemplative chapters -- On Inspiration, On Seeing, On Intimacy, On Order, On Change -- this lavishly produced volume comprises a rich and seamless interweaving of image and word. This is a book not to be missed by anyone interested in the natural world (and its preservation), the art of outdoor photography, the creative process or this vast land called Canada. The photographer and author, long-time friends and avid nature-lovers, share the humble view that, like a Mother, the Earth both bore us and sustains us, asking little in return but love and respect. This book is their reciprocal tribute and holistic offering.\"-- Provided by publisher.
Book
An Efficient 3D Measurement Method for Shiny Surfaces Based on Fringe Projection Profilometry
Fringe projection profilometry (FPP) is a widely employed technique owing to its rapid speed and high accuracy. However, when FPP is utilized to measure shiny surfaces, the fringes tend to be saturated or too dark, which significantly compromises the accuracy of the 3D measurement. To overcome this challenge, this paper proposes an efficient method for the 3D measurement of shiny surfaces based on FPP. Firstly, polarizers are employed to alleviate fringe saturation by leveraging the polarization property of specular reflection. Although polarizers reduce fringe intensity, a deep learning method is utilized to enhance the quality of fringes, especially in low-contrast regions, thereby improving measurement accuracy. Furthermore, to accelerate measurement efficiency, a dual-frequency complementary decoding method is introduced, requiring only two auxiliary fringes for accurate fringe order determination, thereby achieving high-efficiency and high-dynamic-range 3D measurement. The effectiveness and feasibility of the proposed method are validated through a series of experimental results.
Journal Article