NIR Technology
See beyond the surface. Sort by true fruit quality.
What is NIR (Near Infrared)?
NIR (Near Infrared) is a range of electromagnetic radiation with wavelengths of approx. 700–2500 nm, located just beyond visible light.
What makes it unique?
👉 NIR penetrates inside biological materials such as fruit.
Unlike standard cameras that only capture surface appearance, NIR allows you to analyze the internal structure and composition — the real indicator of quality.
How NIR Technology Works
The process in 5 simple steps:
1. NIR light illuminates the fruit
2. Light penetrates beneath the surface
3. Depending on composition:
– part of the light is absorbed
– part is reflected
4. Sensors capture the signal
5. Algorithms convert it into precise quality data
What Does NIR Measure?
NIR technology works because different components leave unique spectral signatures:
– water
– cellular structure
This allows highly accurate, non-destructive quality assessment.
Key parameters:
Core quality indicators
– firmness (soft vs hard fruit)
– dry matter
– ripeness level
Advanced detection
– internal defects
– early-stage decay (invisible externally)
NIR vs Traditional Vision (RGB)
| Feature | RGB | NIR |
|---|---|---|
| Color | ✅ | ❌ |
| External defects | ✅ | ✅ |
| Internal quality | ❌ | ✅ |
| Firmness | ❌ | ✅ |
Conclusion:
RGB evaluates appearance. NIR reveals true quality.
Scattering vs Absorption
Two fundamental physical effects used in NIR analysis:
| Phenomenon | Meaning |
|---|---|
| Absorption | amount of light absorbed → chemical composition (sugars, water) |
| Scattering | light distribution → internal structure and texture |
Why NIR is Essential for Blueberries
Blueberries are one of the most challenging fruits to sort:
– delicate skin
– high sensitivity to damage
– rapid quality degradation
The key challenge:
Fruit can look perfect externally but be soft or damaged inside.
The Problem Without NIR
– sorting based only on color and size
– no control over internal quality
– increased customer complaints
– higher logistical losses
The Solution: NIR
With NIR technology you can:
– reject soft and low-quality fruit
– ensure consistent batch quality
– segment products (premium vs standard)
– reduce waste and returns
A Key Technology for Modern Fruit Sorting
For blueberries in particular, NIR:
– enables true quality-based sorting
– reduces business risk
– increases product value and market competitiveness
NIR allows you to sort blueberries not only by appearance, but by their true internal quality — forming the foundation of modern Green Sort solutions.