5mW Red Cross Laser Module 650nm – Adjustable Focus

5mW Red Cross Laser Module with Adjustable Focus

The 5mW Red Cross Laser Module is a compact laser emitter designed to project a visible red cross-shaped pattern onto a surface. Unlike a standard dot or single-line laser, this module creates two intersecting red lines that provide a convenient visual reference for alignment and positioning applications.

The module produces visible red light at a wavelength of approximately 650nm. In addition, its maximum optical output power is rated at 5mW. Therefore, it provides a clear cross pattern while maintaining low electrical power consumption for embedded and portable projects.

Adjustable Cross-Shaped Laser Projection

The front optical lens allows the user to adjust the focus of the projected pattern. As a result, the thickness and clarity of the cross lines can be improved according to the projection distance and working surface.

Furthermore, the compact cylindrical housing has a diameter of approximately 12mm. This small size makes the 5mW Red Cross Laser Module easy to install inside custom enclosures, positioning tools, robotic systems, laboratory equipment, and educational models.

The module operates from a low-voltage 3–4V DC supply. Consequently, it should not be connected directly to a 5V, 9V, or 12V source unless a suitable voltage regulator or current-control circuit is used.

Recommended Applications

This red cross laser emitter is suitable for:

• Visual alignment and positioning
• Crosshair reference systems
• Robotics and automation projects
• DIY alignment tools
• Machine and workbench positioning
• Educational optical experiments
• Embedded electronic projects
• Object-centering systems
• Camera and sensor alignment
• Laboratory demonstrations

Connection and Operating Instructions

Connect the positive supply wire to a regulated 3–4V DC source and connect the negative wire to ground. Check the supplied unit’s wire polarity before applying power because wire colors may vary between production batches.

After powering the module, rotate the adjustable lens carefully until the projected cross reaches the required clarity. However, avoid excessive rotation or force because this may loosen or damage the optical assembly.

Laser Safety Warning

Never look directly into the laser aperture or aim the beam toward another person’s eyes. In addition, do not point the laser toward vehicles, aircraft, reflective surfaces, or public areas. The reflected beam may also present an eye hazard.

The 5mW Red Cross Laser Module is intended for controlled electronic, educational, and alignment applications. It is not a toy and should only be operated under responsible adult supervision.