Robust structured-light depth mapping via recursive decomposition of binary codes [0.03%]
基于二进制码递归分解的鲁棒结构光深度测量方法
Xiaohua Feng,Liang Gao
Xiaohua Feng
Structured-light depth cameras rely on projecting and resolving coded patterns on a three-dimensional scene with high contrast. The front-end optics of such depth cameras impose a fundamental restriction on the depth-sensing range and accur...
In situ process monitoring in selective laser sintering using optical coherence tomography [0.03%]
基于光学相干层析技术的选区激光烧结过程原位检测方法研究
Michael R Gardner,Adam Lewis,Jongwan Park et al.
Michael R Gardner et al.
Selective laser sintering (SLS) is an efficient process in additive manufacturing that enables rapid part production from computer-based designs. However, SLS is limited by its notable lack of in-situ process monitoring when compared to oth...
Ye Wang,Michal E Pawlowski,Tomasz S Tkaczyk
Ye Wang
A prototype fiber-based imaging spectrometer was developed to provide snapshot hyperspectral imaging tuned for biomedical applications. The system is designed for imaging in the visible spectral range from 400 to 700 nm for compatibility wi...
John Gawedzinski,Michal E Pawlowski,Tomasz S Tkaczyk
John Gawedzinski
We present an analysis of the shape, surface quality, and imaging capabilities of custom 3D printed lenses. 3D printing technology enables lens prototypes to be fabricated without restrictions on surface geometry. Thus, spherical, aspherica...
Unified Approach to the Detection and Classification of Speckle Texture in Diagnostic Ultrasound [0.03%]
诊断超声斑点纹理检测与分类的统一方法研究
Robert F Wagner,Michael F Insana,David G Brown
Robert F Wagner
Second order statistics have been derived for the speckle in diagnostic ultrasound that arises from diffuse (incoherent) scattering in the presence of distributed and organized specular (coherent) scattering. They serve as the basis for a t...
Design and fabrication of a miniature objective consisting of high refractive index zinc sulfide lenses for laser surgery [0.03%]
用于激光手术的高折射率硫化锌透镜微型物镜的设计与制作
Adam Shadfan,Michal Pawlowski,Ye Wang et al.
Adam Shadfan et al.
A miniature laser ablation probe relying on an optical fiber to deliver light requires a high coupling efficiency objective with sufficient magnification in order to provide adequate power and field for surgery. A diffraction-limited optica...
Development of tunable miniature piezoelectric-based scanners validated by the combination of two scanners in a direct image relay technique [0.03%]
一种可调微压电扫描器的研制及其双扫描器直接图像耦合技术实验验证
Adam Harbi Shadfan,Michal Emanuel Pawlowski,Tomasz S Tkaczyk
Adam Harbi Shadfan
Miniature piezoelectric actuators are commonly used as a compact means to relay images for numerous endoscopic applications. These scanners normally consist of an electrically driven lead zirconate titanate (PZT) tube that oscillates an opt...
Three-dimensional measurement of small inner surface profiles using feature-based 3-D panoramic registration [0.03%]
基于特征的3D全景图像配准在小内表面三维测量中的应用研究
Yuanzheng Gong,Eric J Seibel
Yuanzheng Gong
Rapid development in the performance of sophisticated optical components, digital image sensors, and computer abilities along with decreasing costs has enabled three-dimensional (3-D) optical measurement to replace more traditional methods ...
Improved environmental stability for plasma enhanced chemical vapor deposition SiO2 waveguides using buried channel designs [0.03%]
利用埋藏通道设计提高基于等离子化学气相沉积法制备的SiO2波导的环境稳定性
Thomas A Wall,Roger P Chu,Joshua W Parks et al.
Thomas A Wall et al.
Ridge and buried channel waveguides (BCWs) made using plasma-enhanced chemical vapor deposition SiO2 were fabricated and tested after being subjected to long 85°C water baths. The water bath was used to investigate the effects of any water...
Optimization of Y-splitting antiresonant reflecting optical waveguides-based rib waveguides [0.03%]
基于Y分支抗反射光学波导的脊形波导优化
Matthew A Stott,Jennifer Black,Erik Hamilton et al.
Matthew A Stott et al.
Antiresonant reflecting optical waveguide power splitters, designed for use around the 635-nm wavelength, are characterized for multiple split angles ranging from 0.5 deg to 9 deg. Theoretical expectations and simulations predict lowest tra...