Application Notes
Solar Cell Inspection with non contact sensor
Author:Sintec Optronics Time:Aug 13, 2018 View:

Solar Cells Inspection

Executive Summary

Optimet’s ConoProbe MK10 with a 25 mm focal lens was used in the application of solar cells inspection. The tests were performed to demonstrate measurement capability. Three different samples were scanned and their SNR’s were compared.

1. Optimet’s Advantages over Other Technologies:

1. Unique collinear technology

2. Capability to measure sharp angles in minimum clearance  

3. High lateral resolution

4. High sampling rate with no need for averaging

2. Application Description Solar cells scanning using Optimet’s ConoProbe MK10 with a 25 mm focal lens.

Test settings:   All scans were done with a 9 kHz measurement rate, 10 µm X‐step, and 10 µm Y‐step.  

The power settings varied from scan to scan:

Sample 1 – laser power 8

Sample 2 – laser power 8

Sample 3 – laser power 7, 20 (This sample was scanned twice.)

3. Results and Observations

Sample 1

Figure 1 – 3D Solar cell representation (mesh format)

Figure 2 – 3D Solar cell representation (continuous format)

Figure 3 –X profile

Sample 2

Figure 4 – 3D Solar cell presentation

Figure 5 – Sample’s X profile

Sample 3

Figure 6 – 3D Solar cell presentation

Figure 7 – Sample’s X profile

 

Figure 8 – Protrusion’s height

 

 

4. Data

Parameter 

Value
Reflective/Diffusive/Transparent/Translucent  Diffusive
Working Range (mm)  0.7
Precision (μm)  1
Stand Off (mm)  14
Max. Data Rate (Hz)  9K
Lateral Resolution  4
Z Resolution   
Application Category 

 

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