LED and LASER Transmitters
Unit 9 Assignment 1 Transmitters
Explain the differences between led and laser transmitters
Lasers are monochromatic (single color wavelength), collimated (non-divergent) and coherent (wavelengths in- phase) in contrast, LED's are neither coherent nor collimated and generate a broader band of wavelengths
(multiple). In addition, a significant difference between the two is the power output. The peak power output of lasers is measured in watts, while that of LED's, is measured in milliwatts. Also, LED's usually have a 50% duty cycle, meaning that they are "on" 50% of the time and "off" 50% of the time regardless of what frequency (pulses per second) setting is used
LED how they are used.
The most common use of LEDs is in electronic equipment, such as cell phones and VCRs, to inform the users that the item is ON. LEDs are cheap and easy to reproduce (Pontinen 1992). Obviously, these devices are NOT lasers.
1. Freezer Case
LED lighting produces a compound energy benefit when installed in freezer cases. Substantial energy savings can result from the improved directionality of LEDs, better optical control, less light loss from operation of fluorescent lamps at low temperature, and reduced heat.
LASER how they are used.
Medical Lasers: Medical lasers can be used as a scalpel. Since the laser can be controlled and can have such a small contact area it is ideal for fine cutting and depth control. Medical lasers can also be used to reattach retinas and can be used in conjunction with fiber optics to place the laser beem where it needs to be. Medical lasers can also be used to stitch up incisions after surgery, by fusing together skin.
Explain the differences between led and laser transmitters
Lasers are monochromatic (single color wavelength), collimated (non-divergent) and coherent (wavelengths in- phase) in contrast, LED's are neither coherent nor collimated and generate a broader band of wavelengths
(multiple). In addition, a significant difference between the two is the power output. The peak power output of lasers is measured in watts, while that of LED's, is measured in milliwatts. Also, LED's usually have a 50% duty cycle, meaning that they are "on" 50% of the time and "off" 50% of the time regardless of what frequency (pulses per second) setting is used
LED how they are used.
The most common use of LEDs is in electronic equipment, such as cell phones and VCRs, to inform the users that the item is ON. LEDs are cheap and easy to reproduce (Pontinen 1992). Obviously, these devices are NOT lasers.
1. Freezer Case
LED lighting produces a compound energy benefit when installed in freezer cases. Substantial energy savings can result from the improved directionality of LEDs, better optical control, less light loss from operation of fluorescent lamps at low temperature, and reduced heat.
LASER how they are used.
Medical Lasers: Medical lasers can be used as a scalpel. Since the laser can be controlled and can have such a small contact area it is ideal for fine cutting and depth control. Medical lasers can also be used to reattach retinas and can be used in conjunction with fiber optics to place the laser beem where it needs to be. Medical lasers can also be used to stitch up incisions after surgery, by fusing together skin.