22 research outputs found
New developments in the pathology of malignant lymphoma: a review of the literature published from August to December 2008
Design and verification of diffractive optical elements for speckle generation of 3-D range sensors
The optical projection using speckles is one of the structured light methods that have been applied to three-dimensional (3-D) range sensors. This paper investigates the design and fabrication of diffractive optical elements (DOEs) for generating the light field with uniformly distributed speckles. Based on the principles of computer generated holograms, the iterative Fourier transform algorithm was adopted for the DOE design. It was used to calculate the phase map for diffracting the incident laser beam into a goal pattern with distributed speckles. Four patterns were designed in the study. Their phase maps were first examined by a spatial light modulator and then fabricated on glass substrates by microfabrication processes. Finally, the diffraction characteristics of the fabricated devices were verified. The experimental results show that the proposed methods are applicable to the DOE design of 3-D range sensors. Furthermore, any expected diffraction area and speckle density could be possibly achieved according to the relations presented in the paper
Design and verification of diffractive optical elements for speckle generation of 3-D range sensors
Close Correlation between Season of Birth and the Prevalence of Bronchial Asthma in a Taiwanese Population
Outcome of hearing preservation related to tumor morphologic analysis in acoustic neuromas treated by gamma knife radiosurgery
Comparison of photon volumetric modulated arc therapy, intensity-modulated proton therapy, and intensity-modulated carbon ion therapy for delivery of hypo-fractionated thoracic radiotherapy
TEMPO-oxidized cellulose nanofibers as potential Cu(II) adsorbent for wastewater treatment
Multiparameter DNA content analysis identifies distinct groups in primary breast cancer
Molecular tumour pathology - and tumour genetic