Spectroscopic Measurement Device With Tapered Reflective Condenser

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Solution Overview

Problem

Existing spectroscopic measurement devices face challenges in efficiently condensing light over large areas without increasing the size of the condenser lens, which affects measurement accuracy.

Innovation Solution

A spectroscopic measurement device with a condensing member that includes a first opening, a second opening with a smaller area, and a transfer path with a decreasing inner dimension and reflection surface, allowing efficient light condensation using a reflection surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a condenser lens is used to condense light from the light guide on the lower surface of the object to be measured, then light-condensing efficiency can be improved, but the size of the condenser lens must be increased which is not practical in a device with limited disposition space

Engineering Contradiction:

Improvemeasurement accuracyVSAvoidsize of condenser lens

Core Design Contradiction:

Measurement precisionVSVolume of moving object

Solution Approach 1:

The patent replaces the conventional condenser lens (refractive optical system) with a reflection-type condensing member that uses total internal reflection to condense light. This substitution eliminates the need for a large-sized lens while achieving the same light-condensing effect, thereby resolving the contradiction between measurement precision and device size.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the optical path parameters by using a reflection surface with a specific angle (45 degrees) and a tapered transfer path to redirect and condense light from the light guide onto the measurement surface. This parameter change enables efficient light condensation without requiring a large component size.

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If efforts are made to increase the light-condensing efficiency with the condenser lens, then energy per unit area of the light emitted to the object to be measured is increased, but the size of the condenser lens is required to be increased

Engineering Contradiction:

Improveenergy per unit area of lightVSAvoidsize of condensing member

Core Design Contradiction:

Use of energy by moving objectVSVolume of moving object

Solution Approach 1:

The patent replaces the refractive condenser lens with a reflective condensing member that uses total internal reflection to concentrate light energy. This substitution achieves high energy density on the measurement surface without requiring a large component, as the reflection mechanism can redirect and concentrate light from a larger area into a smaller target area.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent uses a three-dimensional tapered transfer path with reflection surfaces to redirect light from the light guide end face onto the measurement surface. This spatial arrangement in multiple dimensions enables efficient energy concentration without increasing the overall size of the condensing member.

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

The device enhances light-condensing efficiency per unit area without increasing size, maintaining measurement accuracy and allowing for adjustable and replaceable condensing members to accommodate different article types.

Implementation Method 1

the transfer path has an inner dimension decreasing from the first opening toward the second opening and includes a wall surface consisting of a reflection surface

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS20250283758A1Spectroscopic measurement device and article inspection device including the same

Publication Date: 2025.09.11 ANRITSU CORP

AI summary

A spectroscopic measurement device includes a light source unit configured to irradiate a tablet with light, and a light detection unit configured to measure a spectral characteristic of transmission light transmitted through the tablet, in which the light source unit includes a condensing member configured to condense light emitted from a light source, the condensing member includes a first opening on which the light emitted from the light source is incident, a second opening formed to face the light detection unit and having an opening area smaller than an opening area of the first opening, and a transfer path configured to communicate the first opening and the second opening and transfer light entering the first opening to the second opening, and the transfer path has an inner dimension decreasing from the first opening toward the second opening and includes a wall surface consisting of a reflection surface.