Multispectral Imaging Focus Control by Selected Wavelength Band
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Solution Overview
Problem
Existing imaging systems struggle to achieve appropriate focus and exposure for images across multiple wavelength bands, leading to suboptimal results when users desire to pay attention to specific spectral bands.
Innovation Solution
An imaging device and system that includes a spectroscopic element to disperse incident light into multiple wavelength bands, allowing user selection of a desired wavelength band for focus and exposure control based on corresponding image information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a spectroscopic element disperses incident light into multiple wavelength bands, then the imaging device can capture multispectral image data, but the focus position control becomes complex because different wavelength bands have different focus characteristics
Solution Approach 1:
The focus position control is made dynamic by allowing the controller to adjust the focus position based on the selected wavelength band. The system transitions from a fixed focus position to a dynamic focus control mechanism that adapts to different spectral bands, resolving the contradiction between capturing multiple wavelengths and maintaining simple focus control.
Solution Approach 2:
The system changes the focus position parameter according to the wavelength band being captured. By varying the focus position parameter based on the spectral characteristics of different wavelength bands, the system achieves appropriate focus for each band while maintaining the ability to capture multiple bands through the spectroscopic element.
2Productivity
If the imaging device captures images across multiple wavelength bands simultaneously, then productivity increases, but the focus position for specific wavelength bands may be suboptimal
Solution Approach 1:
The controller performs preliminary action by determining the appropriate focus position before capturing images in specific wavelength bands. By pre-calculating and setting the optimal focus position based on the selected wavelength band, the system ensures high focus precision while maintaining simultaneous multi-band capture capability, thus resolving the contradiction between productivity and precision.
3Ease of operation
If the system allows user selection of specific wavelength bands, then the ease of operation improves, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The controller performs multiple functions: it receives user selection input, determines appropriate focus positions, and controls the optical system. By making the controller multi-functional, the system improves ease of operation through user-friendly wavelength band selection while minimizing the increase in device complexity by consolidating control functions in a single component.
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 precise focus and exposure adjustment for specific wavelength bands, ensuring high-quality images across multiple spectral ranges without the need for scanning, particularly useful for moving subjects or hyperspectral imaging.
Implementation Method 1
a spectroscopic element disposed between the optical system and the image sensor, the spectroscopic element dispersing incident light into more than three plurality of wavelength bands
Data Source
AI summary
An imaging device includes: an image sensor that captures a subject image via an optical system to generate image data; a spectroscopic element disposed between the optical system and the image sensor, the spectroscopic element dispersing incident light into more than three plurality of wavelength bands; an input interface that receives selection information indicating a wavelength band selected by a user from the plurality of wavelength bands; and a controller that controls a focus position of the optical system based on a piece of image information that is included in multispectral image data and corresponds to the wavelength band, the multispectral image data including pieces of image information corresponding to the plurality of wavelength bands, respectively.