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This paper presents a three-dimensional (3-D) flexible micro light emitting diode (μ-LED) array for optogenetics. The array integrates individually addressable μ-LED chips with out-of-plane polymer-based microscale waveguides for deep brain optical stimulation. SU-8 waveguides were fabricated using a backside exposure method. A wafer-level assembly technique was demonstrated, which permits large scale,...
We present a novel chip-level optical spectrometer in which the transmission characteristics of a 2-dimensional variable size hole array may be used for analyzing the spectral contents of an incident beam.
This work investigates a lens-array-based integral imaging system which consist of a lens array, a main lens and a CCD camera. The lens array is placed on the object side of the main lens, thus can provide wider stereo baseline than other lens-array-based integral imaging system where the lens array is usually placed on the sensor side. However, the image captured by this system presents severe non-linear...
In wireless sensor network (WSN), the performance and effectiveness of the network is highly dependant on its geographical coverage. However, in many applications the actual coverage cannot be guaranteed to meet the requirement due to the random sensor deployment. While existing methods tend to exploit mobility to relocate all the sensors to be evenly distributed, a wireless array-based cooperative...
Unlike the traditional trimming techniques, such as fuse, laser and E2PROM trimming, an iterative scheme based on the digital trimming is adopted for improving the static and the dynamic parameters of the ADC device in this paper. This trimming technique is able to adjust the reference voltage, the common-mode voltage, and the current by changing the topology of the capacity or resistor array with...
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