In this study, a lightweight composite polyimide film optic with antireflective coating was prepared using an ion-beam-assisted reactive sputtering method. It exhibited high transmittance in visible (87%, 0.5~0.8 μm), short (86%, 1.8~2.7 μm) and middle (78%, 3.3~5.4 wavelength infrared regions. Additionally, it also showed great optical homogeneity (0.006 λ RMS 0.034 PV, = 632.8 nm) smooth surf...

Introduction: A case of discoloration a multifocal hydrophobic acrylic intraocular lens (IOL), which was explanted and exchanged as well underwent laboratory analysis, is reported. Patient Clinical Findings: The patient presented with corrected distance visual acuity 20/50 glare in the right eye 8 years after implantation. Slitlamp examination revealed nasally decentered IOL whitish-brownish ha...

The work presented in this paper is part of a wider research project, which aims at documenting and analyzing stained glass windows by means hyperspectral imaging. This technique shares some similarities with UV-VIS-IR spectroscopy, as they both provide spectral information; however, imaging has the additional advantage providing spatial information, since spectrum can be collected each pixel i...

AIMS To assess the influence of glistenings on the optical quality of acrylic foldable intraocular lens. METHODS Several degrees of glistenings in the optic were experimentally created by immersing the lens in water at 37 degrees C for 48 hours and then at 25 degrees C for 24 hours. Optical bench tests were carried out in water including measurements of spectral transmittance with the spectro...

The translucency of comparable shades of five dental porcelains was determined. Both direct transmittance and total transmittance were measured at wavelengths of 400-700 nm. For 1 mm of porcelain, the values for direct transmittance were low and averaged 0.13 percent, whereas the values for total transmittance averaged 26.8 percent. Transmittance increased with increasing incident wavelength. T...

During surgery for colon cancer, monitoring of the oxygen saturation hemoglobin in tissues under study makes it possible to assess degree blood supply anastomosis areas colon. Adequate this area is decisive terms consistency and can significantly reduce risk leakage anastomosis. In work, we propose a new approach assessing based on measuring both diffuse reflectance transmittance spectra wall t...

A concept for optical temperature sensing based on the differential spectral reflectivity/transmittance from a multilayer dielectric edge filter is described and demonstrated. Two wavelengths, λ(1) and λ(2), from the spectrum of a broadband light source are selected so that they are located on the sloped and flat regions of the reflection or transmission spectrum of the filter, respectively. As...