Synthesized Light Wavefront Control for Low-Interference Measurement

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Solution Overview

Problem

Existing technologies struggle to generate synthesized light with desirable characteristics for various application and service providing fields, and there is a need for improved methods and devices to control optical characteristics such as intensity distribution, phase profiles, and coherence in light applications.

Innovation Solution

The use of an optical characteristic converting component that performs wavefront division and amplitude/intensity division to control optical characteristics, including optical phase synchronizing and phase profile control, to generate synthesized light with reduced temporal and spatial coherence, using components like diffusers, diffraction gratings, and optical path length varying elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional light sources are used for imaging and measurement, then the light has stable intensity and wavelength characteristics, but optical interference noise occurs due to high temporal and spatial coherence

Engineering Contradiction:

Improveoptical interference noiseVSAvoidcoherence of light

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent applies wavefront division to split the coherent light into multiple wavefront segments. By dividing the light wavefront into separate paths and then recombining them with controlled phase relationships, the patent reduces temporal and spatial coherence while maintaining stable intensity characteristics. This segmentation approach eliminates optical interference noise without sacrificing measurement reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the coherence parameters of light by introducing optical path length variations and phase modulation. By dynamically adjusting optical path lengths and phase relationships in different wavefront segments, the patent transforms highly coherent light into light with reduced temporal and spatial coherence, thereby reducing optical interference noise while preserving stable intensity characteristics for reliable imaging and measurement.

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If synthesized light with reduced coherence is generated, then optical interference noise is reduced, but control of optical characteristics such as intensity distribution and phase profile becomes more difficult

Engineering Contradiction:

Improveoptical interference noiseVSAvoidcontrol of optical characteristics

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent introduces wavefront division and phase modulation components as intermediary elements between the light source and the target. These intermediaries enable independent control of different optical characteristics (intensity distribution, phase profile, coherence) by manipulating each parameter separately through dedicated optical paths and phase control mechanisms, thereby simplifying the overall control complexity while achieving synthesized light with reduced coherence and minimized optical interference noise.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

This approach effectively reduces optical interference noise and enhances the control of light characteristics, improving the performance of imaging and measurement techniques, and enabling precise optical measurements and service provision.

Implementation Method 1

The optical characteristic converting component performs wavefront division and amplitude/intensity division to control optical characteristics

Methodology Applied

Scientific EffectWavefront division: Diffraction

Implementation Method 2

using components like diffusers, diffraction gratings, and optical path length varying elements

Methodology Applied

Scientific EffectDiffusion: Diffusion

Implementation Method 3

using components like diffusers, diffraction gratings, and optical path length varying elements

Methodology Applied

Scientific EffectDiffraction: Diffraction

Implementation Method 4

using components like diffusers, diffraction gratings, and optical path length varying elements

Methodology Applied

Scientific EffectOptical path length variation: Refraction

Data Source

PatentUS12467786B2Measurement device, synthesized light applying method, optical measuring method, service providing system, and service providing method

Publication Date: 2025.11.11 JAPAN CELL

AI summary

According to one embodiment of a method of generating synthesized light, a light emitter emits a first light element and a second light element, the synthesized light includes the first light element and the second light element, the first light element passing through a first optical path propagates toward a first direction, the second light element passing through a second optical path propagates toward a second direction, the first optical path has a first optical path length, the second optical path has a second optical path length, the first optical path length is different from the second optical path length, and the first direction is different from the second direction.