650nm 5mW Focusable Red Line Laser Module – 3-6V Red Laser Generator Diode

The 650nm 5mW Focusable Red Line Laser Module is a compact optical module that projects a visible red laser line. Unlike a point laser, this module produces a line-shaped beam that can be useful for alignment, positioning, measurement references, and optical experimentation.

The adjustable lens ring allows the line focus to be changed according to the required working distance. This makes the module useful in applications where a visible reference line needs to be positioned on a surface or object.

Its small cylindrical form factor and low-voltage DC operation make it convenient for robotics, industrial positioning equipment, laboratory projects, signaling applications, and DIY electronics.

Features

• 650nm visible red laser output
• Line-shaped laser beam
• Maximum optical output listed at 5mW
• Adjustable focus through the lens ring
• Approximately 120° emitting angle
• Compact Ø12 × 35mm housing
• Low-voltage DC operation
• Typical working current around 20mA according to supplied specifications
• Pre-attached power cable
• Red wire for positive/anode connection
• Black wire for negative/cathode connection
• Suitable for positioning, alignment, testing, and DIY applications

Applications

• Industrial equipment positioning
• Concentricity checking
• Equipment alignment and positioning
• Sight and alignment systems
• Signaling devices
• Laser testing and optical experiments
• Robotics and automation projects
• DIY electronics and optical projects
• Reference-line projection

How to Use

1. Connect the red wire to positive (+) and the black wire to negative (-).
2. Use a suitable regulated DC power supply within the specified voltage range.
3. Power the module while keeping the beam pointed toward a safe, non-reflective target.
4. Carefully rotate the front lens ring to adjust the focus and obtain the desired line sharpness.
5. Secure the module in its mounting position after achieving the required alignment.

Important Notes

• Laser radiation can cause serious eye injury. Never look directly into the beam.
• Never point the laser toward a person's or animal's eyes.
• Avoid aiming the beam at mirrors, highly reflective surfaces, vehicles, aircraft, or other targets where hazardous reflections may occur.
• Use appropriate laser safety eyewear when required by the application and operating environment.
• This module produces a line, not a red dot or single-point beam.
• Connect the power supply with the correct polarity.
• Do not exceed the specified operating voltage.
• Do not assume that a microcontroller GPIO can safely supply the module's operating current. Use an appropriate transistor/MOSFET driver when direct GPIO operation is unsuitable.
• Keep the lens clean and free from dust to maintain a clear projected line.
• The optical output and current can vary between individual modules and production batches.
• Product dimensions may have approximately 5% manual measurement deviation.
• Product images are for illustrative purposes only and may differ from the actual product.
• Keep the laser module away from children and unauthorized users.

Package Includes

• 1 × 650nm 5mW Focusable Red Line Laser Module