Waveguide Laser Steering Without Mechanical Adjustment

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Existing laser technologies require mechanical adjustments to change the direction of laser irradiation, which is inefficient and limits their flexibility and speed.

Innovation Solution

A laser apparatus with an optical device featuring two reflection mirrors and a waveguide, where the direction of laser irradiation is controlled by adjusting the wavelength and irradiation direction of the incident laser, allowing non-mechanical changes in the direction of laser emission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If mechanical adjustments are used to change laser irradiation direction, then the laser can be directed to arbitrary positions, but the system becomes complex and the response speed is limited

Engineering Contradiction:
Improvelaser direction controlVSAvoidmechanical adjustment mechanism
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces mechanical adjustment mechanisms with an optical device that uses wavelength-dependent light reflection and waveguide propagation. By changing the wavelength of incident light rather than mechanically moving components, the laser irradiation direction is controlled optically, eliminating mechanical complexity while maintaining directional control capability.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the wavelength parameter of the incident light to control the direction of laser irradiation. The optical device is configured so that different wavelengths of light are reflected at different angles by the reflection mirrors and travel through different paths in the waveguide, enabling directional control through wavelength modulation rather than mechanical movement.

Inventive Principle:
Principle #35Parameter changes

2Measurement precision

If mechanical components are used for direction control, then the laser can be steered, but the system response speed is limited and precision is reduced

Engineering Contradiction:
Improvelaser irradiation direction precisionVSAvoiddirection change speed
Core Design Contradiction:
Measurement precisionVSSpeed

Solution Approach 1:

The patent eliminates mechanical components from the direction control system and replaces them with an optical wavelength-based control mechanism. This substitution enables instantaneous direction changes by simply modulating the wavelength of the incident light, achieving both high speed response and high precision without the limitations of mechanical inertia and positioning accuracy.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent utilizes the periodic nature of light waves and their wavelength-dependent interaction with the optical device structures (reflection mirrors and waveguide). By periodically modulating the wavelength parameter, the system achieves precise and rapid control over laser irradiation direction, leveraging the inherent periodic properties of electromagnetic radiation rather than mechanical periodic motion.

Inventive Principle:
Principle #19Periodic action

3Quantity of substance

If traditional laser arrays are configured, then multiple laser sources can be provided, but the system becomes large and low-density

Engineering Contradiction:
Improvenumber of laser sourcesVSAvoidlaser array size
Core Design Contradiction:
Quantity of substanceVSVolume of moving object

Solution Approach 1:

The patent makes a single optical device serve multiple functions by enabling it to generate multiple laser beams in different directions through wavelength multiplexing. Instead of requiring separate physical laser sources for each direction, one optical device can handle multiple wavelengths that correspond to different irradiation directions, effectively creating a multi-functional system that reduces the number of physical components needed.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent adds the wavelength dimension to the traditional spatial arrangement of laser sources. Instead of arranging multiple laser sources in physical space (x, y, z dimensions), the system uses wavelength (spectral dimension) to differentiate between different laser beams and directions. This dimensional transformation allows multiple laser functions to be packed into a single compact device, dramatically reducing the volume required for a multi-source laser array.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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

Enables rapid and flexible control of laser irradiation direction without mechanical components, allowing for faster and more precise emission in desired directions, while also enabling a compact and high-density laser array configuration.

Implementation Method 1

a waveguide formed between the two reflection mirrors... at least a portion of the laser travels on the waveguide by being reflected by the two reflection mirrors in order

Methodology Applied
Scientific EffectTotal internal reflection: Total Internal Reflection

Implementation Method 2

two reflection mirrors arranged to face each other... configured so that at least a portion of the laser travels on the waveguide by being reflected by the two reflection mirrors in order

Methodology Applied
Scientific EffectReflection: Reflection

Data Source

PatentUS12005518B2Laser apparatus
Publication Date: 2024.06.11 MITSUBISHI HEAVY IND LTD
  • US12005518B2 patent drawing
  • US12005518B2 patent drawing
  • US12005518B2 patent drawing

AI summary

Changing non-mechanically a direction of irradiating a laser. The laser apparatus includes an optical device and a laser irradiation device. The optical device has two reflection mirrors facing each other, and a waveguide between the two reflection mirrors. The laser irradiation device irradiates the optical device with laser. The optical device is configured so that at least a portion of the laser travels on the waveguide by being reflected by the two reflection mirrors in order. The optical device has an output surface that emits a portion of the laser. The laser irradiation device has a plurality of irradiation parts including a first irradiation part that irradiates a first laser and a second irradiation part that irradiates a second laser. When viewed from a normal direction of the output surface, a traveling direction of the first laser is not parallel to a traveling direction of the second laser.