1. What is a CLS sensor?

A CLS sensor is a compact line scan camera that is mounted directly above the object being inspected. It is the same type of camera used in many fax or document scanners. The CLS consists of an array of silicon photodiodes, a gradient index (GRIN) lens array, and a light source.

The basic configurations that KADO can provide are:

2. What is the difference between CLS and traditional line scan cameras?

Conventional line scan cameras have small sensors (10 – 50 mm long) with small pixels (3 – 20 µm). The image is produced by reduction optics. The sensor of CLS is as wide as the object being inspected (up to 4 m). The image is produced by 1:1 optics. Pixel sizes range from 11 µm to 127 µm.

3. What are the advantages of CLS compared to traditional line scan cameras?

(1) Easy installation, no need for large space

(2) Easy adjustment, no multi-camera alignment issues

(3) Constant viewing angle across the entire reading width, no lens distortion

(4) Clear and sharp images

4. What are the advantages of traditional line scan cameras compared to CLS?

(1) A greater depth of field (DoF) can be achieved;

(2) A single camera is lighter;

(3) The pixel size is small (3~4µm) and the line frequency can reach up to 80kHz.