When selecting an Alvium camera, understanding the shutter mode is crucial. There are two main types: Global Shutter and Rolling Shutter.

How Does a Camera Shutter Work?

The shutter mechanism determines how pixels capture light (exposure) before converting into an image signal. Global Shutter captures all pixels simultaneously, while Rolling Shutter processes each row sequentially from top to bottom.

Global Shutter

All pixels start and stop capturing light at the same time — hence its name “Global.” This allows sharp images of fast-moving objects because motion blur is minimized during exposure. Examples include Alvium 1800 C-040 or C-158 models used in high-speed quality inspections.

Key advantages:

  • Freezes moving subjects effectively
  • Ideal for applications requiring precise imaging

Rolling Shutter

Exposure occurs row-by-row, with each line starting slightly after the previous one. This “rolling” effect resembles a curtain closing gradually — hence its name. While suitable for slow-moving or static scenes like microscopy, it can cause distortion in high-motion scenarios.

Common use cases:

  • Scientific imaging (e.g., microscopy)
  • Cost-effective solutions where speed isn’t critical

Choosing the Right Shutter Mode

Global Shutter: Recommended for fast-moving objects and demanding industrial applications.
Rolling Shutter: Suitable for static or slow scenes; often more budget-friendly.

Additional Tips:

  1. Simulate Global Shutter Effect: Use strobe lighting during rolling phases to reduce distortion.
  2. Controlled Lighting: Keep subjects in darkness during integration pauses if possible.

Need Help?

If unsure about your specific application, consult our experts for personalized advice. They can help determine the optimal shutter mode based on motion speed and lighting conditions.

Last Updated: 2025-09-04 16:56:57