Polychrometer Stray Light Correction via Relative Spectral Distribution

Solution Overview

Problem

Conventional polychrometers face challenges in accurately correcting stray light due to the time and cost associated with obtaining necessary matrix data for stray light distribution, especially when measuring wavelengths with low energy and small ratios.

Innovation Solution

A dual channel polychrometer system that calculates the relative spectral distribution of stray light independent of the incident light's spectral distribution, using intensity coefficients to estimate and correct stray light, allowing for more accurate correction without direct estimation from the incident light.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If matrix data is obtained by measuring outputs at respective wavelengths of stray light range using single-wavelength lights, then stray light distribution can be estimated and corrected, but it takes time and cost to obtain necessary accuracy

Engineering Contradiction:

Improvestray light correction accuracyVSAvoidtime to obtain matrix data

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-obtaining and storing the relative spectral distribution of stray light during the manufacturing process. This pre-acquired data serves as a reference that can be quickly applied during actual measurements, eliminating the need to obtain matrix data each time while maintaining correction accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by creating a reference model of stray light distribution that is stored in the system. This reference copy of stray light characteristics is then reused for multiple measurements, avoiding repeated time-consuming data collection while maintaining correction precision

Inventive Principle:

Principle #26Copying

2Measurement precision

If matrix data is obtained by measuring outputs at respective wavelengths of stray light range using single-wavelength lights, then stray light distribution can be estimated and corrected, but it incurs cost to obtain necessary accuracy

Engineering Contradiction:

Improvestray light correction accuracyVSAvoidcost to obtain matrix data

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent applies preliminary action by pre-obtaining and storing the relative spectral distribution of stray light during the manufacturing process. This pre-acquired data serves as a reference that can be quickly applied during actual measurements, eliminating the need to obtain matrix data each time while maintaining correction accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by creating a reference model of stray light distribution that is stored in the system. This reference copy of stray light characteristics is then reused for multiple measurements, avoiding repeated time-consuming data collection while maintaining correction precision

Inventive Principle:

Principle #26Copying

3Productivity

If stray light distribution is directly estimated from incident light, then correction can be performed, but accuracy is insufficient compared to using relative spectral distribution independent of incident light

Engineering Contradiction:

Improvecorrection processing speedVSAvoidstray light correction accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent applies preliminary action by pre-obtaining and storing the relative spectral distribution of stray light during the manufacturing process. This pre-acquired data serves as a reference that can be quickly applied during actual measurements, eliminating the need to obtain matrix data each time while maintaining correction accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by creating a reference model of stray light distribution that is stored in the system. This reference copy of stray light characteristics is then reused for multiple measurements, avoiding repeated time-consuming data collection while maintaining correction precision

Inventive Principle:

Principle #26Copying

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 enables more accurate stray light correction using easily obtainable information, reducing the time and cost associated with obtaining matrix data, and improving measurement accuracy by separating stray light distribution from the incident light's spectral distribution.

Implementation Method 1

A beam I incident on an incident slit from a light source S is converted into a parallel beam by a lens L to be incident on a diffraction grating G, thereby being diffused and reflected

Methodology Applied

Scientific EffectDiffraction: Diffraction

Data Source

PatentUS7859663B2Polychrometer and method for correcting stray lights of the same

Publication Date: 2010.12.28 KONICA MINOLTA SENSING INC

AI summary

In a polychrometer and a method for correcting stray light of the polychrometer, relative spectral (inter-pixel) distribution of stray light independent of a spectral distribution of an incident light is obtained, intensity coefficient of the stray light is calculated according to spectral (inter-pixel) distribution of the incident light, spectral (inter-pixel) distribution of the stray light included in a spectral (inter-pixel) distribution of an incident light is estimated and corrected. Thus, the stray light can be more accurately corrected as compared with a conventional case where stray light distribution is directly estimated from an incident light.