Spectrometer Shader Layout for High-Intensity Wavelength Suppression

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Spectrometers face issues due to excessive strong energy in specific wavelength regions, affecting light splitting efficiency and photosensitive efficiency, leading to suboptimal measurement results.

Innovation Solution

A spectrometer design incorporating a shader between the light splitter and image sensor to suppress spectral components with excessively high light intensity, using an opaque piece or neutral density filter, with adjustable positioning to avoid shadows on the sensing surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a spectrometer measures optical signals across a wide wavelength range, then the measurement range is improved, but excessive strong energy in specific wavelength regions causes saturation and reduces measurement precision

Engineering Contradiction:
Improvemeasurement rangeVSAvoidmeasurement precision
Core Design Contradiction:
Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent applies local quality by placing a shader with specific optical properties at a particular location in the optical path. The shader has different optical characteristics (absorption, reflection, or scattering properties) at different regions to selectively attenuate specific wavelength components that cause saturation, while allowing other wavelengths to pass through unchanged. This localized modification of optical properties enables the system to maintain both wide measurement range and high precision by addressing only the problematic wavelength regions.

Inventive Principle:
Principle #3Local quality

2Illumination intensity

If the shader is positioned to suppress spectral components with excessively high intensity, then the light intensity distribution is improved, but the shadow from the shader may fall on the sensing surface and interfere with measurement

Engineering Contradiction:
Improvelight intensity distributionVSAvoidshadow interference
Core Design Contradiction:
Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The patent resolves the shadow interference problem by changing the spatial dimension of the solution. Instead of trying to eliminate the shadow in the same plane, the system positions the shader such that its shadow falls on a different dimension or location on the sensing surface - specifically, the shadow is directed to fall outside the active sensing area or on regions that do not correspond to the spectral components being measured. This dimensional relocation of the shadow eliminates its harmful interference while maintaining the shader's light intensity regulation function.

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

3Illumination intensity

If the shader directly attenuates spectral components, then the excessive light intensity is suppressed, but the complexity of the optical system increases

Engineering Contradiction:
Improvelight intensity suppressionVSAvoidoptical system complexity
Core Design Contradiction:
Illumination intensityVSDevice complexity

Solution Approach 1:

The patent uses the shader as an intermediary element in the optical path that mediates between the light splitter and the image sensor. Rather than modifying the light splitter or sensor directly, the shader acts as a intermediate component that selectively attenuates specific wavelength components. This intermediary approach allows for simple adjustment of light intensity distribution without fundamentally changing or complicating the core optical system architecture, maintaining system simplicity while achieving the desired intensity suppression.

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

Enhances optical resolution and prevents excessive light intensity from overwhelming the image sensor, maintaining measurement accuracy and precision.

Implementation Method 1

The shader shades the portion of the plurality of spectral components to suppress a part of the plurality of spectral components having excessively high light intensity

Methodology Applied
Scientific EffectAbsorption (EM radiation): Absorption (EM radiation)

Implementation Method 2

The light splitter is disposed on the base for incidence of the optical signal received by the light input, and to split the optical signal into a plurality of spectral components

Methodology Applied
Scientific EffectDiffraction: Diffraction

Data Source

PatentUS12467790B2Spectrometer
Publication Date: 2025.11.11 OTO PHOTONICS
  • US12467790B2 patent drawing
  • US12467790B2 patent drawing
  • US12467790B2 patent drawing

AI summary

A spectrometer includes a base, a light input, a light splitter, an image sensor and a shader. The light input is disposed on the base for receiving an optical signal. The light splitter is disposed on the base to split the received optical signal into a plurality of spectral components. The image sensor is disposed on the base, and has a sensing surface for receiving the plurality of spectral components. The shader having a non-ring shape is disposed between the light splitter and the image sensor, and is located on a projection path of a part of the plurality of spectral components. A shadow generated by the shader on the sensing surface falls on an area of the sensing surface corresponding to the part of the plurality of spectral components. A divergence angle of each spectral component out of the part of the plurality of spectral components is reduced.