JAI CV-L105 operation manual Functions and Operations, Principle of operation

CV-L105

6. Functions and Operations

6.1. Principle of operation

A line scan camera works according to the same principle as a fax machine, also sometimes referred to as a “push broom” operation.

It captures a single line at a time (horizontal), and requires either the object or the camera to be moving to create the vertical direction of the image.

Area

Fig. 8. The principle of line scan.

A 3CCD line scan camera follows the exact same principle, with the added complexity of three CCD sensors mounted on a dichroic prism. The three CCD sensors are aligned on the prism in such as way, that they all view the same part of the object. This is referred to as co-site sampling. Figure 4 shows the construction of the prism, and how the CCDs are aligned.

IR-cut	Blue
	pixel

Green

pixel n of

Red

pixel

Fig. 9. 3 CCD prism construction.

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