3D Imaging Device Wavelength-Dependent Filters Parallax
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Solution Overview
Problem
Existing 3D image capturing technologies using primary color filters face inefficiencies in light usage and increased device size and cost, particularly when capturing single-color light rays, leading to unnatural images and limited applicability.
Innovation Solution
A 3D image capture device with a light-transmitting section having multiple areas with different wavelength dependences and a photosensitive cell array with corresponding transmitting filters, allowing for efficient multi-viewpoint image generation without mechanical driving, even with single-color light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If primary color filters (R, G, B) are used in the light beam confining plate to capture multi-viewpoint images, then parallax information can be obtained, but the quantity of light received by the image sensor becomes much smaller than usual
Solution Approach 1:
The patent changes the wavelength dependence parameters of the transmitting filters from primary color filters (R, G, B) to filters with different spectral characteristics that have broader transmission bands. This parameter change allows the filters to transmit more light while still providing the necessary parallax information through their distinct wavelength dependences
Solution Approach 2:
The patent segments the wavelength dependence characteristics into multiple transmitting areas and corresponding transmitting filters, where each has a different wavelength dependence. This segmentation allows the system to capture parallax information through the differential wavelength responses while maintaining high light transmission efficiency
2Loss of information
If primary color filters are used to obtain multi-viewpoint images, then parallax can be captured, but the device size and manufacturing cost increase
Solution Approach 1:
The transmitting filters with different wavelength dependences serve multiple functions: they enable parallax capture, maintains high light transmission, and can be integrated into the existing image sensor structure. This multi-functionality reduces the need for additional components and simplifies the overall device design
Solution Approach 2:
By changing the wavelength dependence parameters of the filters from narrow primary color bands to broader spectra with distinct characteristics, the patent reduces the complexity of the optical system while maintaining the ability to capture parallax information
3Loss of information
If primary color filters are used for multi-viewpoint image capture, then parallax information is obtained, but image quality becomes unnatural when capturing single-color light rays
Solution Approach 1:
The patent changes the wavelength dependence characteristics of the transmitting filters to have broader transmission bands compared to primary color filters. This allows the filters to capture single-color light rays effectively while maintaining distinct spectral differences necessary for parallax information, thereby preserving image quality
Solution Approach 2:
The patent segments the wavelength response into multiple transmitting areas and filters with different wavelength dependences, allowing each to capture relevant spectral information. This segmentation ensures that even single-color light rays are captured with sufficient detail to maintain natural image quality while extracting parallax information
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 efficient use of incoming light for multi-viewpoint image capture, reducing device size and cost while maintaining image quality and parallax information, even with single-color light sources.
Implementation Method 1
a transmitting filter array arranged to face the photosensitive cell array, wherein the photosensitive cell array and transmitting filter array are comprised of multiple unit elements, each of which includes n photosensitive cells and n transmitting filters, which are arranged to face the n photosensitive cells and whose transmittances have mutually different wavelength dependences
Data Source
AI summary
This 3D image capture device includes a light-transmitting section 2 with m transmitting areas (where m is an integer and m≧2) and a solid-state image sensor 1. The sensor 1 has unit elements, each of which includes n photosensitive cells (where n is an integer and n≧m) and n transmitting filters that face those photosensitive cells. If the wavelength is identified by λ, the transmittances of transmitting areas C1 and C2 are identified by Tc1(λ) and Tc2(λ), the transmittances of two transmitting filters are identified by Td1(λ) and Td2(λ), and the interval of integration is the entire visible radiation wavelength range, ∫Tc1(λ)Td1(λ)dλ>0, ∫Tc1(λ)Td2(λ)dλ>0, ∫Tc2(λ)Td1(λ)dλ>0, ∫Tc2(λ)Td2(λ)dλ>0, and ∫Tc1(λ)Td1(λ)dλ∫Tc2(λ)Td2(λ)dλ≠∫Tc2(λ)Td1(λ)dλ∫Tc1(λ)Td2(λ)dλ are satisfied.