The transport of electromagnetic waves is essential in many scientific and engineering fields. In recent years, substantial researches have been conducted in computer graphics to model and simulate the optical phenomena of subsurface scattering. The ultimate goal is to develop accurate scattering inodels for complex surfaces and media, as well as efficient algorithms for simulating the related ...

Advances in optical character recognition (OCR) software and computer hardware have stimulated a reevaluation of the technology and its ability to capture structured clinical data from preexisting paper forms. In our pilot evaluation, we measured the accuracy and feasibility of capturing vitals data from a pediatric encounter form that has been in use for over twenty years. We found that the so...

Founded in 1991, Digital Optics Corporation began as a micro-optics developer and is now a leading supplier of diffractive and micro-optical components. In the late 1990s, Digital Optics recognized that the labor-intensive integration and packaging of its components in the optoelectronic industry was driving customer costs higher and was leading manufacturers to seek inexpensive, overseas labor...

Electro- and magneto-optical phenomena play key roles in photonic technology enabling light modulators, optical data storage, sensors and numerous spectroscopic techniques. Optical effects, linear and quadratic in external electric and magnetic field are widely known and comprehensively studied. However, optical phenomena that depend on the simultaneous application of external electric and magn...

Optical trapping using focused laser beams has emerged as a powerful tool in the biological and physical sciences. However, scaling this technique to nanosized objects remains challenging due to the diffraction limit of light and the high power levels required for nanoscale trapping. In this paper, we propose plasmonic coaxial apertures as low-power optical traps for nanosized specimens. The il...

Optical activities such as circular dichroism (CD) and optical rotatory dispersion (ORD) are manifested by almost all natural products. However, the CD is an extremely weak effect so that time-resolved CD spectroscopy has been found to be experimentally difficult and even impossible for vibrational CD with current technology. Here, we show that the weak-signal and nonzero background problems ca...

The term geometrical–optical illusions was coined by Johann Joseph Oppel (1815–1894) in 1855 in order to distinguish spatial distortions of size and orientation from the broader illusions of the senses. We present a translation of Oppel’s article and a commentary on the material described in it. Oppel did much more than give a name to a class of visual spatial distortions. He examined a variety...

Holographic data storage (HDS) has emerged as a promising technology for high-capacity storage. In this study, we propose novel approach to enhance the density in HDS through multiplexing perfect optical vortex (POV) hologram. By utilizing orthogonality property of POV, different POV-recording holograms can be multiplexed store multiple pages within single Compared with conventional vortex, bet...

Optical trapping is a widely used technique, with many important applications in biology and metrology. Complete modelling of trapping requires calculation of optical forces, primarily a scattering problem, and nonoptical forces. The T-matrix method is used to calculate forces acting on spheroidal and cylindrical particles. Preprint of: T. A. Nieminen, H. Rubinsztein-Dunlop, N. R. Heckenberg an...