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A novel micro optical diffusion sensor device has been developed, which enables high-speed measurement with a small sample volume and without using any additives. In this paper, the design of this sensor is considered.
We demonstrated a handheld multispectral fluorescence confocal microscope for cervical cancer diagnostic using dual-axis confocal microscope architecture and a microelectromechnical systems scanner. The real time images are acquired with frame rate upto 15 Hz.
Optical techniques are widely used for trapping of particles. One such technique involves the use of passive diffractive optical elements. Recently, a novel passive diffractive optical element, a spiral phase Fresnel zone plate (FZP) was proposed [1]. In this paper, we present an improved version, of the earlier reported element, that will allow for a compact optical configuration for generation of...
A resonant biaxial comb-actuated 7mm-MEMS scanning mirror with tripod-suspension is developed to provide omnidirectional scanning in an automotive time-of-flight LIDAR sensor application. Wafer level vacuum packaging technology is applied to enable circular scanning at 550Hz at large tilt angle.
A miniature tunable multi-blade iris diaphragm driven by microelectromechanical systems (MEMS) is developed. The diameter of the iris diaphragm aperture is experimentally demonstrated to be able to adjust continuously from 0.45 mm to 1.56 mm.
A near-field scanning optical microscope (NSOM) probe based on CMOS-MEMS technology is proposed. The side pin-hole photodetector and the on-chip transimpedance amplifier were characterized. An optical profile measurement by using the fabricated device was performed.
We present a novel electrical impedance sensor for measuring the resealing time of porated mammalian plasma membranes. Openings were generated by high speed cavitation bubbles using laser pulsing of metallic microdisks on transparent ITO electrodes. Real-time impedance measurements show that membrane resealing time and impedance recovery takes 1 to 2 minutes after laser pulsing. Our method can also...
We describe a 2-D MEMS scanner for a handheld multispectral confocal microscope for early detection of cervical cancer. The MEMS scanner has an inner gimbal design with torsional springs separated from the reflectors to reduce light loss while maintaining chip size to 3.25 × 3.25 mm2. The devices are large-scale batch fabricated using a double layer SOI process. The scanner has electrostatic optical...
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