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Rotating vs. Sliding Beam Expander Divergence Adjustment

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Rotating vs. Sliding Beam Expander Divergence Adjustment

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Laser beam expanders increase the diameter of a collimated input beam to a larger collimated output beam and are critical components of a wide range of laser systems. Beam expanders typically have a mechanical divergence adjustment in order to adjust for different input divergences or wavelengths. Variable beam expanders allow for enough mechanical adjustment to change their magnification, or expansion power. There are two main types of beam expander divergence adjustment: rotating and sliding. As their name implies, rotating divergence adjustment, such as threaded focusing tubes, rotate the optical elements of the beam expander during translation.

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