ICOLS2012-Speckle Characterization in Laser Projector Display
نویسندگان
چکیده
Resins are used in nuclear power plants for water ultrapurification. Two approaches are considered in this work: column experiments and simulations. A software called OPTIPUR was developed, tested and used. The approach simulates the onedimensional reactive transport in porous medium with convectivedispersive transport between particles and diffusive transport within the boundary layer around the particles. The transfer limitation in the boundary layer is characterized by the mass transfer coefficient (MTC). The influences on MTC were measured experimentally. The variation of the inlet concentration does not influence the MTC; on the contrary of the Darcy velocity which influences. This is consistent with results obtained using the correlation of Dwivedi&Upadhyay. With the MTC, knowing the number of exchange site and the relative affinity, OPTIPUR can simulate the column outlet concentration versus time. Then, the duration of use of resins can be predicted in conditions of a binary exchange. Keywords—ion exchange resin, mass transfer coefficient, modeling, OPTIPUR
منابع مشابه
Full colour holographic laser projector HUD
Light Blue Optics’ holographic laser projection technology is uniquely suited as a light engine for automotive head-up display (HUD) applications, providing high brightness images with low speckle contrast and wide colour gamut whilst being robust and fault-tolerant. This paper describes the operation of the technology and its advantages, demonstrating – for the first time – the operation of a ...
متن کاملAnalysis of laser speckle severity, granularity, and anisotropy using the power spectral density in polar- coordinate representation
The conventional speckle contrast measures only speckle severity, and is unable to characterize granularity and anisotropy in displayed images, which are easily picked up by human observers. Here, we propose a comprehensive method based on the power spectral density which allows the simultaneous measurement of three components of laser speckle-severity, granularity and anisotropy—as a superior ...
متن کاملOptimal full speckle suppression in laser projectors using one 2D Barker code-type optical diffractive elements
The effective method of a speckle suppression using one moving 2D diffractive optical elements based on the periodic Barker code sequence is developed. It was proved that method has the same optical parameters as method based on two 1D Barker code DOE stretched and moving in orthogonal directions. It is shown that DOE movement in special direction allows to use full numerical aperture of object...
متن کاملSpeckle reduction in laser-illuminated picoprojectors
Speckle can seriously degrade image quality in laser-illuminated projection displays. Various solutions appropriate to small microdisplay-based projectors are presented. Illumination optical system and projection optical system design are discussed in order to better understand the critical constraints of size, power consumption, optical efficiency, and performance. DYOPTYKA’s innovative soluti...
متن کاملNon-moving Hadamard matrix diffusers for speckle reduction in laser pico-projectors
Personal electronic devices such as cell phones and tablets continue to decrease in size while the number of features and add-ons keep increasing. One particular feature of great interest is an integrated projector system. Laser pico-projectors have been considered, but the technology has not been developed enough to warrant integration. With new advancements in diode technology and MEMS device...
متن کامل