41. The intelligent terminals integrate Symbol's leading-edge laser diode scan engine which have been ruggedized to accommodate all-weather delivery. 42. It uses fancy laser diodes and holograms to permit much more accurate tracking than a standard floppy drive. 43. The image is then processed by a PC graphics card and replicated with a series of laser diodes . 44. The SLidar system is also a robust and inexpensive system based on compact laser diodes and array detectors. 45. In the system I tried, I used circuitry to pulse the laser diode on / off at 40 MHz. 46. These methods are exploited in the design of heterojunction bipolar transistors ( HBTs ), laser diodes and solar cells. 47. SEM ( Scanning Electron Microscope ) image of a commercial laser diode with its case and window cut away. 48. Key to avoiding these problems is replacing the flash lamps with more efficient pumps, typically based on laser diodes . 49. The most commonly used optical transmitters are semiconductor devices such as light-emitting diodes ( LEDs ) and laser diodes . 50. Various indium compounds ( indium arsenide, indium phosphide ) are also being used in LEDs and solid state laser diodes .
