How Do Collimators Work?

An optical collimator consists of a tube containing a convex lens at one end and an adjustable aperture at the other, the aperture being in the focal plane of the lens. Radiation entering the aperture leaves the collimator as a parallel beam, so that the image can be viewed without parallax.

What do collimators control?

As collimation increases, the quantity of scatter radiation decreases, and radiographic contrast increases; as collimation decreases, the quantity of scatter radiation increases, and radiographic contrast decreases.

What is the main function of a collimator?

The function of a collimator is to stop all non-perpendicular photons from striking the crystal. In spectrometer, Collimator is used as the telescope. The collimator affects two important imaging parameters – sensitivity and resolution.