Note: A simple laser shutter with protective shielding for beam powers up to 1 W

Area of Science:

• Optics and Photonics
• Mechanical Engineering
• Electronics

Background:

• Laser systems require precise control of light.
• Existing laser shutters can be expensive or complex.
• Need for a cost-effective and reliable shutter solution.

Purpose of the Study:

• To design and build an inexpensive and reliable mechanical laser shutter.
• To develop an electronic driver for the shutter using modular components.
• To achieve fast response times and durability.

Main Methods:

• Utilized a camera diaphragm shutter unit for light blocking.
• Employed an Arduino microcontroller with a motor-shield for the driver.
• Focused on using readily available, modular parts to minimize cost and effort.

Main Results:

• Achieved opening and closing durations under 800 microseconds.
• Measured a timing jitter of less than 25 microseconds with the fastest blade set.
• Demonstrated no performance degradation over 50,000 operational cycles.
• The system effectively shields the shutter mechanism up to 1 W laser power.

Conclusions:

• The designed mechanical laser shutter is inexpensive, reliable, and fast.
• The Arduino-based driver provides precise control.
• This modular design offers a practical solution for laser light control.