Product Overview
The638nm 120mW Wide Voltage Red Laser Module is designed for applications
requiring a high-brightness visible red laser with flexible electrical input and adjustable optical output.
With a638nm wavelength and 120mW output power, the module provides
a strong visible red beam. Its3.5–25V DC wide-voltage inputallows integration into systems using common 12V or 24V power supplies.
The module is available in dot, line and cross-line configurations.
The optical system supports external adjustment of spot size
and line width for different working distances and installation requirements.
The standard series is available in compact configurations, with optional larger housings for customized equipment.
The module uses a 638nm semiconductor laser source with a nominal output power of 120mW.
Main specifications:
The 638nm wavelength provides a highly visible red reference beam suitable for positioning and alignment applications.
The module supports a broad DC input range of:
3.5–25V
This allows use in equipment based on common DC power systems, including:
Other input voltages can be customized for OEM projects.
The point version can provide a long visible reference range under suitable environmental conditions.
Reference range:
The beam may produce a visible air-path effect under suitable atmospheric conditions.
Actual range depends on ambient light, atmospheric conditions,
target surface, optical adjustment, installation environment and beam configuration.
The point configuration supports external optical adjustment.
The spot size can be adjusted from approximately:
0.4mm to several centimeters
This provides flexibility for applications requiring different spot sizes at different working distances.
The line configuration is suitable for linear positioning, alignment and reference applications.
The line width can be externally adjusted from approximately:
0.4mm to several centimeters
This allows the beam to be optimized for different installation distances and target surfaces.
The cross-line version generates horizontal and vertical red reference lines.
Indoor reference range:
Up to approximately 13m
The cross-line configuration can be customized according to
the required optical angle, working distance and installation environment.
| Beam Type | Reference Performance |
|---|---|
| Dot – Indoor Daytime | Up to 2000m |
| Dot – Outdoor | Up to 500m |
| Dot – Dark Environment | Up to 3000m |
| Visible Air Beam | Under suitable conditions |
| Line – Indoor | Approx. 15–16m |
| Line – Outdoor | Approx. 5–7m |
| Line Installation Height | 0–10m |
| Cross Line – Indoor | Approx. 13m |
| Spot Adjustment | 0.4mm to several cm |
| Line Width Adjustment | 0.4mm to several cm |
Performance note:Actual range and beam visibility vary with ambient illumination,
atmospheric conditions, target reflectivity, working distance and optical configuration.
The product series supports different housing configurations.
16×70mm
22×110mm
For some optical configurations, the laser head can also be supplied in a compactΦ12×50mmhousing.
Custom mechanical dimensions can be developed according to equipment requirements.
The housing is made from aviation aluminum with insulating surface treatment.
The internal thermal construction includes:
This design helps improve heat dissipation and mechanical stability during extended operation.
The module is designed for extended operation and can be configured for applications requiring long operating periods.
The 638nm 120mW red laser module can be used in:
With its3.5–25V wide voltage input, this 638nm laser module
can be integrated into equipment using 12V or 24V DC power systems.
Suitable for equipment and control systems using 12V DC power.
Suitable for industrial equipment and automation systems using 24V DC power.
The final power supply should always be matched to the actual configured laser module.
We provide OEM and ODM laser module customization for different industrial and optical applications.
Available customization options include:
For custom projects, please provide:
Wavelength + Power + Voltage + Beam Type + Working Distance + Size + Quantity
Our engineering team can evaluate the required configuration.
638nm provides a strong visible red reference beam for positioning and alignment.
Provides a high-brightness output suitable for specialized long-distance positioning applications.
3.5–25V DC input supports common 12V and 24V equipment.
Spot size and line width can be externally adjusted according to application requirements.
Dot, line and cross-line versions are available.
The point configuration can provide long-distance reference performance under suitable conditions.
Wavelength, power, voltage, size, optical effect and other parameters can be customized.
The standard wavelength is638nm red.
The standard output power is120mW.
Yes. The specified input range is3.5–25V DC, so 12V systems can be supported when properly matched to the configured module.
Yes. The 3.5–25V range includes 24V DC operation when the configured module and power supply are properly matched.
The stated reference range is up to 2000m indoors during daytime,
500m outdoors and 3000m in dark environments. Actual range depends strongly on environmental and optical conditions.
Yes. The spot size can be externally adjusted from approximately0.4mm to several centimeters.
Yes. The line width can be externally adjusted from approximately0.4mm to several centimeters.
Yes. A cross-line configuration is available, with an indoor reference range of approximately 13m.
Yes. Standard and optional housing sizes are available, and custom dimensions can be discussed for OEM projects.
Yes. Other voltage requirements can be discussed according to the customer's equipment.
This product emits visible red laser radiation at638nm with a nominal output power
of 120mW. Avoid direct eye exposure and hazardous reflections.
Use appropriate laser safety controls, beam containment, warning labels,
controlled access and protective measures according to the actual installation and applicable local regulations.
The final laser safety classification should be determined from the actual
configured output and optical system rather than from the product title alone.
Photex Laser provides 638nm 120mW high-power red laser modules with adjustable dot, line and cross beam options,
3.5–25V wide voltage input, and OEM customization for industrial positioning, machine alignment, measurement and optical equipment applications.
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