- infrared radiation of protostars
- infrared radiation source
- infrared radiometer
- infrared radiometric calibration field
- infrared radiometry
- infrared ray
- infrared reflection-absorption spectroscopy
- infrared reflection-absorption spectroscopy, IRAS
- infrared reflective coating
- infrared reflective mirror
- infrared remote sensing applications
- infrared remote sensing of atmosphere
- infrared remote sensor
- infrared response polymer
- infrared satellite
- infrared scanner
- infrared searching and tracking system
- infrared semiconductor laser materials
- infrared-sensitive film
- infrared sensitive phosphor
- infrared sensor
- infrared silica glass
- infrared singularity
- infrared slavery
- infrared solar radiation