Spectroscopic Camera Simulating RGB Responses
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Solution Overview
Problem
Existing inspection systems require complex mechanisms for switching between RGB and spectroscopic cameras, complicating the configuration and determining the appropriate camera type for accurate surface property inspection based on the article's type and required accuracy.
Innovation Solution
A spectroscopic camera system with a variable wavelength interference filter and a wavelength-table generating section that selectively transmits light, allowing for the acquisition of spectral images and determining the necessary camera type without the need for an RGB camera, simplifying the system configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If both RGB camera and spectroscopic camera are used for accurate surface property inspection, then measurement precision is improved, but device complexity increases due to the need for optical path switching mechanisms
Solution Approach 1:
The spectroscopic camera is designed to perform multiple functions: it can capture full spectral images for detailed surface property inspection and can also simulate RGB camera responses by applying sensitivity curves to the spectral data. This eliminates the need for a separate RGB camera while maintaining inspection capabilities for both spectral analysis and color-based detection
Solution Approach 2:
The system creates a virtual copy of RGB camera functionality by mathematically transforming spectral image data using sensitivity curves. The wavelength-table generating section generates transformation tables that convert spectral responses into simulated RGB values, allowing the spectroscopic camera to replicate RGB imaging without requiring actual RGB sensors
2Device complexity
If a spectroscopic camera is used alone instead of both RGB and spectroscopic cameras, then device complexity is reduced, but measurement precision may be compromised without the ability to simulate RGB responses
Solution Approach 1:
The system changes the parameter representation of the spectral data by applying different sensitivity curves to transform the spectral responses into simulated RGB values. The wavelength-table generating section creates transformation parameters that allow flexible conversion between spectral space and RGB space, enabling the single camera to adapt to different inspection requirements
Solution Approach 2:
The system performs preliminary calibration by generating wavelength tables and sensitivity curve data before actual inspection. The wavelength-table generating section pre-computes transformation parameters based on the spectroscopic camera's sensitivity characteristics, enabling rapid conversion to simulated RGB images during inspection without real-time computational delays
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 accurate surface property inspection by simulating RGB images using the spectroscopic camera, determining the required camera type, and simplifying the system configuration by eliminating the need for complex optical path switching mechanisms.
Implementation Method 1
a spectroscopic section configured by a variable wavelength interference filter that selectively transmits light at a predetermined wavelength and changes the light to transmitted light
Data Source
AI summary
A spectroscopic camera according to the present disclosure includes a spectroscopic section configured by a variable wavelength interference filter that selectively transmits light at a predetermined wavelength and changes the light to transmitted light, a receiving section configured to receive sensitivity information indicating a sensitivity curve in a wavelength region of a predetermined color imaged by an RGB camera, a wavelength-table generating section configured to generate, based on the sensitivity information, a wavelength table indicating a relation between the predetermined wavelength and a transmission time, which is a time for transmitting the transmitted light, an imaging section configured to acquire a spectral image formed by the transmitted light transmitted through the spectroscopic section, and a control section configured to control the spectroscopic section and the imaging section based on the wavelength table.