Laser module red 635nm, circle with dot

Introduction

This manual provides instructions for the safe use and regular maintenance of laser modules designed for projecting indicators (lines, crosses, dots, and DOE/grids) with a maximum output of up to 2000 mW. The document also includes the definition of a safety zone based on tabulated values that determine the distance at which the exposure is classified as Class 3B (higher risk) and from which it is classified as Class 3R (lower risk).

1. Understanding the Risks of Laser Radiation

• Eye Damage – Direct and reflected laser radiation can cause permanent retinal damage.
• Skin Burns – An intense beam may cause burns with prolonged exposure.
• Mechanical Risk – Improper handling of optical components (lenses, mirrors, DOE) may lead to their misalignment or damage, increasing the concentration of emitted energy.
• Accidental Activation – Service interventions without proper disconnection from power or violation of safety measures may result in unintended laser activation.

2. Overview of Safety Classes and Necessary Precautions

• Class 2
  • Low-power lasers (usually up to 1 mW) – safe during brief exposure due to the blink reflex.
  • Warning labels indicating not to look into the beam.
  • Adherence to safety procedures to prevent accidental increases in exposure.
• Class 3R
  • Lasers with slightly higher power (up to several mW) – direct viewing may cause damage, but the risk is relatively lower.
  • Output apertures are marked with warning labels.
  • Strict adherence to safety distances to ensure exposure remains at Class 3R levels.
• Class 3B
  • High-power lasers where direct exposure to the beam can cause immediate and permanent eye damage.
  • Requirement for a key switch to prevent accidental activation.
  • Implementation of a remote interlock system (e.g., door switch or emergency button).
  • Visible activity indicator (“Laser On”) and requirement to wear protective goggles during service interventions.
• Class 4
  • The highest power level, where even scattered radiation poses extreme danger to eyes and skin.
  • Prominent warning labels and markings, a key switch, interlock system, and mechanical beam shutter.
  • The device must have a manual reset after each interruption of operation, and operation is permitted only by qualified personnel in designated areas.

3. Definition of the Safety Zone

The safety zone is defined using a table that specifies:

• Controlled Zone (3B): The area from the device up to a distance of X meters, where the exposure corresponds to Class 3B. Only trained users have access to this zone, and strict measures apply (key switch, interlock, mandatory protective goggles).
• Restricted Zone (3R): The area beyond X meters, where the exposure drops to Class 3R. Basic safety measures, such as area marking and physical barriers, must also be observed here.

Note: The value of X should be determined using the available calculator. Physical marking of the safety zones (floor, wall signs, etc.) is mandatory.

4. Proper Handling of the Product

• Before Activation – Place the device in a stable location where the safety zone is clearly defined. Verify that all safety features (key switch, interlock, protective covers) are functioning properly.
• During Operation – Adhere to the safety zones. Never enter the controlled zone (3B) without appropriate training and protective gear. Ensure that unauthorized personnel do not enter areas with high exposure.
• During Handling and Service – Before any service intervention, completely turn off the device and disconnect it from the power supply. Do not remove or modify any safety features or protective covers.

5. Maintenance and Service

• Regular Inspections – Perform visual and functional checks of the optical components and safety covers. Verify the proper operation of interlock systems, the key switch, and indicators.
• Cleaning – Clean optical components (lenses, mirrors, DOE) only with approved cleaning agents and a soft cloth (preferably microfiber) in a controlled environment.
• Service and Calibration – If deviations in projection or other functional issues are detected, contact an authorized service provider. Document all service interventions and calibrations.

6. Emergency Procedures

• In Case of Malfunction – Immediately turn off the device and disconnect it from the power supply. Prevent unauthorized access to the safety zone and record a description of the malfunction. Contact an authorized service provider.
• In Case of Accidental Exposure – Immediately stop the exposure (turn off the device, leave the beam area). If there is any suspicion of eye or skin injury, provide first aid and seek medical assistance. Document the incident properly.

7. Conclusion and Recommendations

By following the above procedures, you ensure safe operation and minimize the risks associated with laser radiation. A proper definition of the safety zone based on tabulated values (controlled zone 3B and restricted zone 3R) allows for clear delineation of areas where stricter measures must be observed, and provides users with clear instructions for safe handling of the product.

We recommend a regular review and update of the documentation according to changes in operating conditions and personnel training.

EU Importer: AMPUL SYSTEM s.r.o., Čsl. armády 641/40, 78701 Šumperk, Czech Republic,