Color Adjusting Apparatus for Optical Scan Modules
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Solution Overview
Problem
Conventional optical scan modules experience inconsistent output intensities for primary colors (red, green, and blue) due to varying light source brightness, wavelength transmission through lenses, and differing light sensitivities of the charge-coupled device, requiring costly and time-consuming compensation and correction processes.
Innovation Solution
A color adjusting apparatus and method that involves using a reflector or forming a colored plating film on a lens to enhance the intensity of specific colors, or replacing the light source with a color-adjusted one, to improve the output intensities of red, green, and blue light for the charge-coupled device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional light source with multiple wavelengths is used, then the charge-coupled device can detect multiple colors, but the output intensities for red, green and blue are inconsistent due to varying light source brightness, lens transmission, and detector sensitivity
Solution Approach 1:
The invention segments the light source function by using three separate light sources (red, green, blue) instead of one multi-wavelength source. Each light source is independently controlled and optimized for its specific wavelength, eliminating the inconsistency problem caused by varying transmission characteristics of lenses and sensitivity of detectors for different colors.
Solution Approach 2:
The invention applies local quality by using light sources with specifically optimized spectral characteristics for each color channel. Each light source is designed to emit primarily in its designated color range, ensuring consistent and predictable output intensities that match the detector's sensitivity profile for that specific wavelength region.
2Manufacturing precision
If firmware compensation and correction is applied to each scan step, then correct color output can be obtained, but the process becomes costly and time consuming
Solution Approach 1:
The invention performs preliminary action by pre-configuring the optical system with three dedicated monochromatic light sources that inherently produce consistent color output. This eliminates the need for subsequent firmware compensation and correction processes, as the color accuracy is built into the hardware configuration rather than applied as a post-processing step.
3Productivity
If the scan moving speed of the charge-coupled device is increased, then productivity improves, but the exposure amount decreases and light sensitivity is degraded
Solution Approach 1:
The invention applies parameter changes by using three separate light sources with optimized intensity parameters for each color channel. This allows independent control and optimization of exposure levels for red, green, and blue channels, ensuring sufficient exposure amount even at high scan speeds where exposure time is reduced.
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 solution directly enhances the performance of specific colors, reducing the need for post-scan compensation and correction, thereby saving time and cost while improving the consistency of light output.
Implementation Method 1
the light source (such as a light tube) 100 radiates on the document 200 disposed on the light transparent board 300
Implementation Method 2
An imaging light 110 is obtained via reflection (where the light source 100 is located underneath the light transparent board 300)
Implementation Method 3
The mirror set 400 is an assembly of multiple mirrors 401, 402, 403 and is located along the optical path of the imaging light 110. The image of the document 200 directed to the mirror set 400 is reflected to the lens set 500 thereby.
Implementation Method 4
Through the lens set 500, the imaging light 110 of the document 200 is incident and displayed on the charge-coupled device 600.
Implementation Method 5
Through the function of the charge-coupled device 600, for example, after inspection of modulation transfer function (MTF), a certain degree of color deviation often results.
Data Source
AI summary
Color adjusting apparatus and method for a light source. A reflector of a required color is added to a light source of a scan module, a plating film of the required color is formed on a lens, or the lens is dyed with the required color. Or alternatively, the color of the light source is directly changed into the required color. As a result, the inconsistent intensities for the light in the primary color, red, green and blue output from the charge-coupled device caused by different brightness of the light source, different wavelength transmission of the lens, and different light sensitivity of the charge-coupled device is improved.