Infrared absorbers are materials that can absorb infrared radiation and convert it into heat. Various types of infrared absorbers are used in different applications, such as thermal imaging, sensors, and protective coatings. Here are some common types of infrared absorbers:
### 1. **Metallic Absorbers**
- **Metal Films:** Thin films of metals like gold, silver, or aluminum can be used to absorb infrared radiation due to their free electrons,