3D ultrafast laser scanner

Ultrafast dark-field surface inspection with hybrid-dispersion laser scanning

“…The laser scanner is essentially identical to the previously demonstrated ultrafast laser scanner known as the hybrid dispersion laser scanner (HDLS) [11][12][13][14][15][16][17] and consists of a dispersive fiber and a pair of diffraction gratings for temporally and spatially dispersing optical pulses, respectively. The HDLS's line scanning beam is generated from a modelocked Ti:Sapphire laser with a center wavelength of 810 nm, a broadband bandwidth of 20 nm, and a pulse repetition rate of 90.9 MHz.…”

Measurement technologies for precision positioning

“…Instead of a steering mirror, an acousto-optic deflector (AOD) has been employed to deflect the laser beam for faster scanning [80]. Mahjoubfaret et al proposed a hybrid dispersion laser scanner (HDLS), which offers roughly three orders of magnitude higher scan rates than conventional methods [143]. As shown in Fig.…”

Optical Data Compression in Time Stretch Imaging

“…High-throughput real-time instruments are needed to acquire large data sets and to detect and classify rare events. Examples include the time stretch camera [2][3][4][5][6][7][8][9][10][11][12]-a MHz-frame-rate bright-field imager, and the fluorescence imaging using radio frequency-tagged excitation (FIRE)-an ultra-high-frame-rate fluorescent camera for biological imaging [13]. The record throughputs of these instruments have enabled the discovery of optical rogue waves [14], the detection of cancer cells in blood with false positive rate of one cell in a million [15], and the highest performance analog-to-digital converter ever reported [16].…”