Laser Diffuser Integrity Detection Using Electric or Magnetic Fields
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Solution Overview
Problem
Laser modules with optical diffusers can become dangerous if the diffuser is removed, dislodged, or damaged, as this can lead to increased radiant exposure and irradiance, potentially harming human eyes and skin.
Innovation Solution
A laser system that includes a housing, a laser light source, an optical device with conductive elements, and sensing elements to measure changes in electric or magnetic fields affected by the optical device, allowing for detection of any dislocation, removal, or damage to the optical device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a robust sealed enclosure is used to protect the optical diffuser, then the reliability of the laser module is improved, but the device complexity increases
Solution Approach 1:
The patent applies preliminary action by implementing a sensing system that detects the integrity and position of the optical diffuser before dangerous conditions arise. The sensing elements continuously monitor the optical path, and the control circuit prevents laser operation if the diffuser is compromised, thereby proactively maintaining safety without requiring overly complex mechanical protection structures.
2Productivity
If the laser power is increased to maintain effective operation, then the productivity of the laser system is improved, but the object-affected harmful factors increase
Solution Approach 1:
The patent implements feedback by using sensing elements to continuously monitor the optical path and diffuser integrity, with the control circuit receiving signals about the actual operating conditions. This feedback loop allows the system to maintain high laser power for productivity while automatically detecting and responding to any conditions that could create harmful radiant exposure or irradiance, ensuring safe operation at high power levels.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively detects changes in the optical device's position or integrity, preventing unsafe operation of the laser module by ensuring the optical diffuser remains correctly positioned and undamaged.
Implementation Method 1
The field between the at least one conductive element and the first sensing element may comprise an electric field, and wherein the measured characteristic comprises a capacitance that is dependent on the electric field
Implementation Method 2
The field between the at least one conductive element and the first sensing element may comprise a magnetic field, and wherein the first sensing element comprises a first coil, and wherein the measurement circuit is configured to apply a current to the first coil to induce a first magnetic field
Data Source
AI summary
The present disclosure relates to a laser system/package that is configured to enable the detection of a change in an optical device that is intended to alter light emitted from the laser. The system is designed to measure an electric or magnetic field that is affected by the optical device. As a result, changes in the optical device, for example because the optical device has been damaged or dislodged or removed, should be detected by a corresponding change in the electric or magnetic field.