Login|Register|Cart

5mW Red Cross Laser Module – 6mm Diameter Laser Diode for Pointers/Alignment

SKU: FA3021-2
Module Type

Red cross laser module
Output Power

5mW
Wavelength

650nm (red)
Operating Voltage

3V – 5V DC
Housing Diameter

6mm
Laser Class

Class 3R
Pattern

Cross (two perpendicular lines)
Operating Temperature

-10°C to +50°C

The 5mW Red Cross Laser Module is a compact, precision optical device designed to project a cross-shaped red laser pattern for alignment, positioning, and targeting applications. Housed in a 6mm diameter cylindrical barrel, this module is widely used in laser pointers, alignment tools, leveling instruments, and DIY electronics projects. It produces a visible red cross that makes it easy to align objects, mark reference points, or create crosshair patterns for precision work.

At the heart of the module is a 5mW red laser diode operating at a wavelength of approximately 650nm, which produces a bright, visible red beam. The laser passes through a cylindrical lens that splits the beam into two perpendicular lines, forming the characteristic cross pattern. The cross projection is ideal for applications requiring two-axis alignment, such as centering, leveling, and positioning tasks.

The module features a 6mm diameter brass or aluminum housing that provides durability and effective heat dissipation for the laser diode. The compact form factor allows easy integration into handheld tools, mounting brackets, and custom enclosures. The module operates from a 3V to 5V DC supply, making it compatible with common battery configurations and microcontroller projects. A built-in driver circuit regulates the current to the laser diode, ensuring stable output and long lifespan.

The 5mW output power is within the Class 3R laser safety limit, making it suitable for alignment and pointing applications when used responsibly. The red cross pattern is visible in indoor environments and low-light conditions, with an effective range of several meters depending on ambient lighting.

The module is widely used in laser pointers, alignment tools, leveling instruments, positioning systems, barcode scanners, medical devices, industrial measurement equipment, and DIY electronics projects. It is also popular in educational projects for teaching optics, laser principles, and alignment techniques.

Important Safety Note: This is a Class 3R laser product. Do not stare directly into the laser beam or point it at people, animals, or reflective surfaces. Use appropriate laser safety glasses when operating the module. Keep out of reach of children. The module should be mounted securely and operated only by individuals who understand laser safety precautions.

Whether you are building an alignment tool, a laser pointer, or a custom positioning system, the 5mW Red Cross Laser Module provides a reliable, affordable solution. It is suitable for individual makers, students, and businesses purchasing in bulk for product development or industrial applications.

Features

  • Red cross laser pattern — Projects two perpendicular lines for alignment and positioning

  • 5mW output power — Visible red beam at 650nm wavelength

  • 6mm diameter housing — Compact brass or aluminum barrel for easy integration

  • Built-in driver circuit — Regulates current for stable output and long lifespan

  • Wide voltage range — 3V to 5V DC operation, compatible with batteries and MCUs

  • Compact form factor — Fits into handheld tools, brackets, and custom enclosures

  • Durable construction — Brass or aluminum housing for heat dissipation

  • Wide application range — Pointers, alignment tools, leveling instruments, positioning systems

  • Visible cross pattern — Effective range of several meters in low-light conditions

  • Cost-effective — Affordable solution for alignment and positioning in volume production

Technical Specifications 

# Parameter Specification
1 Module Type Red cross laser module
2 Output Power 5mW
3 Wavelength 650nm (red)
4 Operating Voltage 3V – 5V DC
5 Housing Diameter 6mm
6 Laser Class Class 3R
7 Pattern Cross (two perpendicular lines)
8 Operating Temperature -10°C to +50°C

Usage

Getting Started

  1. Connect power — Supply 3V to 5V DC to the module’s power leads. Observe correct polarity. The module includes a built-in driver circuit, so no external resistor is required.

  2. Mount the module — Secure the 6mm barrel in a mounting bracket, holder, or custom enclosure. Ensure the module is aimed at the target surface.

  3. Power on — Apply power and observe the red cross pattern projected onto the surface. Adjust the module’s position to align the cross with your reference point.

  4. Focus (if needed) — Some modules allow focus adjustment by rotating the lens assembly. Adjust for the sharpest cross pattern at your desired distance.

  5. Implement in your project — Use the cross pattern for alignment, positioning, or targeting in your application.

Electrical Connections

Wire Function
Red VCC (3V–5V DC)
Black GND

Typical Applications

  • Laser pointers — Handheld pointing devices

  • Alignment tools — Align objects, tiles, and equipment

  • Leveling instruments — Check level and plumb

  • Positioning systems — Mark reference points for cutting, drilling, or assembly

  • Barcode scanners — Cross pattern for scanning alignment

  • Medical devices — Positioning aids for medical equipment

  • Industrial measurement — Alignment in manufacturing and construction

  • DIY electronics projects — Custom laser alignment and targeting systems

Important Safety Notes

  • Do not stare into the beam — Class 3R laser radiation can cause eye damage

  • Do not point at people or animals — Avoid direct exposure

  • Avoid reflective surfaces — Reflections can be hazardous

  • Use laser safety glasses — When operating the module for extended periods

  • Keep out of reach of children — Not a toy

Notes for Business Buyers

  • Class 3R laser — Suitable for alignment and pointing applications with proper safety precautions.

  • Built-in driver — No external resistor required; operates from 3V to 5V.

  • Compact 6mm housing — Easy integration into handheld tools and custom enclosures.

  • Suitable for bulk purchasing — Ideal for alignment tool manufacturers, laser pointer makers, and industrial equipment integrators.

Q: What is the 5mW Red Cross Laser Module used for?

It is an alignment and positioning laser that projects a red cross pattern, used in laser pointers, alignment tools, leveling instruments, positioning systems, and DIY electronics projects.

Q: What is the output power and wavelength?

The module outputs 5mW at a wavelength of 650nm (visible red).

Q: What voltage does the module require?

It operates from 3V to 5V DC. The built-in driver circuit regulates the current, so no external resistor is required.

Q: Is this a Class 3R laser?

Yes. The 5mW output falls within the Class 3R laser safety limit. Use appropriate safety precautions.

Q: What is the housing diameter?

The module has a 6mm diameter cylindrical housing, typically made of brass or aluminum.

Q: How do I connect the module?

Connect the red wire to VCC (3V–5V) and the black wire to GND.

Q: Can I adjust the focus?

Some variants allow focus adjustment by rotating the lens assembly. Check your specific module for focus capability.

Q: What is the effective range of the cross pattern?

The cross pattern is visible for several meters indoors and in low-light conditions. Range depends on ambient lighting.

Q: Is the module waterproof?

No. The module is not waterproof and should be kept dry.

Q: Can I purchase in bulk for a product development project?

Yes. This module is suitable for both individual users and business purchasing, including alignment tool manufacturers, laser pointer makers, and industrial equipment integrators.

Related products