The 5mW Red Line Laser Module is a compact, precision optical device designed to project a straight red laser line for alignment, positioning, cutting guides, and industrial applications. Housed in a 6mm diameter cylindrical barrel, this module is widely used in laser levels, alignment tools, cutting machines, and DIY electronics projects. It produces a visible red line that makes it easy to align objects, mark reference lines, or create straight-edge guides 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 (also called a line generator lens) that spreads the beam into a straight line rather than a dot. The line projection is ideal for applications requiring single-axis alignment, such as leveling, cutting guides, 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 industrial applications when used responsibly. The red line pattern is visible in indoor environments and low-light conditions, with an effective range of several meters depending on ambient lighting. The line thickness and fan angle vary by module variant — common fan angles are 60°, 90°, and 120°.
The module is widely used in laser levels, alignment tools, cutting machines, sewing machines, 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 a laser level, a cutting guide, or a custom alignment system, the 5mW Red Line 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 line laser pattern — Projects a straight line 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 — Laser levels, alignment tools, cutting machines, industrial measurement
-
Visible line pattern — Effective range of several meters in low-light conditions
-
Multiple fan angles available — 60°, 90°, and 120° variants (depending on module)
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Module Type | Red line 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 | Line (fan angle varies by variant) |
| 8 | Operating Temperature | -10°C to +50°C |
