Difference between Infrared, Visible light and Ultraviolet
This page compares Infrared (IR) vs Visible light (VL) vs Ultraviolet (UV) and mentions difference between IR, VL and UV.
All these are part of electromagnetic spectrum. These bands are distinguished mainly based on their unique frequencies and wavelengths. These bands are used in OWC (Optical Wireless Communication) systems such as LiFi, LiDAR, FSO (Free Space Optical) communication, OCC (Optical Camera Communication) and so on.
• Wavelength : 760 nm to 1 mm
• Communication distance : Short and medium ranges in LiFi and OCC
• Advantages: It is not visible for human eye
• Disadvantages: It is not always safe for human. LOS communication and very limited low data rate NLOS communication using reflection of infrared waves.
• Applications : LiFi, OCC (Optical Camera Communication), FSO (Free Space Optical) communication, LiDAR
Visible light (VL)
Following are the features of VL communication.
• VLC technology uses visible light part of the light spectrum.
• It uses wavelength range from 380 nm to 750 nm (i.e. frequency range from 430 THz to 790 THz) for communication.
• Data to be transmitted is modulated before transmission by modulating the light. PA (Power Amplifier) is not needed unlike RF communication.
• LEDs and lasers are used as transmitter or source. Photodiode detectors are used as receivers.
• Similarly LiFi >> is one of the many applications of VLC (Visible Light Communication).
• Wavelength : 10 to 400 nm
• Communication distance : Short and medium ranges in LiFi
• Advantages : High data rate NLOS communication is possible, Not visible for human eye.
• Disadvantages : Not safe for human
• Applications : LiFi, FSO
Tabular difference between IR, VL and UV
Following table mentions difference between IR, VL and UV.
Reference : M. Z. Chowdhury et al.:
Comparative Survey of Optical Wireless Technologies: Architectures and Applications
Refer Ultrasonic vs Infrared >> for difference between Ultrasonic sensor and Infrared sensor.
Ultrasonic sensor and Infrared sensor related links
Sensors and Transducers Related Links
Proximity Sensor Occupancy Sensor vs Motion Sensor LVDT and RVDT sensor Position, displacement and level sensor force sensor and strain sensor temperature sensor pressure sensor Humidity sensor MEMS sensor Touch sensor Haptic sensor Wireless sensor motion sensor LoRaWAN sensor Light sensor Ultrasonic sensor MAF sensor Infrasonic sensor Speed sensor Smoke sensor Infrared sensor EMF sensor Level sensor Active motion sensor vs passive motion sensor
Advantages and Disadvantages of other Sensor Types
What is Difference between
difference between FDM and OFDM
Difference between SC-FDMA and OFDM
Difference between SISO and MIMO
Difference between TDD and FDD
Difference between 802.11 standards viz.11-a,11-b,11-g and 11-n
OFDM vs OFDMA
CDMA vs GSM