With the development of the laser and radar technology, imaging lidar has been widely used in the fields of military
applications. Without the scanner devices, scannerless imaging lidars have the characteristic of high frame rate, wide
field of view and high reliability. Three kinds of scannerless imaging lidar system, such as based on the phase
scannerless imaging lidar, based on the multiple-slit streak tube imaging lidar and based on the flash lidar have been
analyzed in this paper. Moreover, the principle, the characteristics and limitations were investigated. Valuable
conclusions were proposed for the selection of scannerless imaging lidar in certain circumstance.
With the development of semiconductor laser technology, laser proximity fuzes have been widely used in various kinds
of guided missiles and routine ammunitions. Combined with the current situation, the digital laser fuzes system based on
the FPGA has been proposed in this paper. Combined with the current situation, the system has been divided into
emitting module, receiving module and signal processing module, the three modules have been analyzed in details. In the
emitting module, the driven circuit based on the FPGA has been developed, the laser pulse with 20ns width and 10kHz
repetition frequency have been obtained. Meanwhile, the emitting optical system and receiving optical system have been
designed. In the receiving module, the receiving circuit with preamplifier and A/D sampling and convert circuit have
been developed. In the signal processing module, anti-interference methods were proposed which can find applications in
the laser proximity fuze research.
Laser diodes are widely used in many fields, but the poor beam quality is an obvious deficiency. The intensity
distribution of a beam from a laser diode in the slow axis is so complex that it is difficult to be described by a Gaussian
distribution of a certain order. The beam qualities of a certain type of laser diode in the directions of perpendicular and
parallel to junction are evaluated in this paper. The intensity distributions in two directions are described respectively by
fundamental mode Gaussian distribution and multi-mode Hermite-Gaussian distribution. The computed data is basically
in accord with the experimental data. The mathematical model may provide some suggestions for the designing of optical
system with laser diodes and related simulations.
With the development of semiconductor laser technology, laser proximity fuzes have been widely used in various kinds
of guided missiles and conventional ammunitions. Conventional laser proximity fuzes consisting of separated
components, have the disadvantages such as large volumes and poor anti-jamming abilities, so are not satisfied with the
modern warfare circumstances. Combined with the separated components, the system has been divided into transmitting
module, receiving module and information processing module, the different modules have been analyzed in detail,. Meanwhile, the transmitting driven circuit has been developed and laser pulse with 20ns narrow width was obtained. In order to meet the multifunction and miniaturization, laser fuzes based on MEMS/MOEMS have been introduced in this paper. Technologies include vertical-cavity surface-emitting laser, integrated resonant-cavity photodetector and refractive micro-optics. The entire structure was roughly 1~2mm thick and 1mm on a side.
With the development of VLSI, CMOS image sensor has developed increasingly. The history of CMOS image sensor
was introduced, on the basis of analyzing the principle of CCD and CMOS image sensor, the advantages of CMOS
image sensor was summarized. The current research status and commercial productions of different companies were
described in this paper, moreover, the technical specifications were presented. At last, the current applications and trends
of CMOS image sensor was focused.
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