Coded Aperture Imaging with Interchangeable Lens for Variable Angle of View
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Solution Overview
Problem
Existing lensless imaging technologies face challenges in changing the angle of view while maintaining refocusing functionality, as altering the pitch or position of Fresnel zone plates affects optical resolution and image quality.
Innovation Solution
Incorporating a lens into the imaging apparatus with a coded aperture, allowing for adjustable angle of view through interchangeable lenses and aberration correction, which maintains refocusing capabilities and improves image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the pitch of the Fresnel zone plate is increased to set a wide angle state, then the angle of view is widened, but the optical resolution is decreased
Solution Approach 1:
The patent applies dynamics by making the pitch of the Fresnel zone plate adjustable rather than fixed. The pitch can be dynamically changed to different values (first pitch for wide angle, second pitch for narrow angle) depending on the desired angle of view, allowing the system to adapt between wide-angle and telephoto states without permanent structural changes.
Solution Approach 2:
The patent applies parameter changes by varying the pitch parameter of the Fresnel zone plate to control the angle of view. By changing the pitch from a first value to a second value, the system transitions between wide-angle and narrow-angle modes, directly linking parameter modification to functional change.
2Adaptability or versatility
If the Fresnel zone plate is brought close to the image sensor to set a wide angle state, then the angle of view is widened, but the positional accuracy requirements are increased
Solution Approach 1:
The patent applies dynamics by making the distance between the Fresnel zone plate and image sensor adjustable. The distance can be dynamically changed to different values (first distance for wide angle, second distance for narrow angle) depending on the desired angle of view, allowing the system to adapt between wide-angle and telephoto states without permanent structural changes.
Solution Approach 2:
The patent applies parameter changes by varying the distance parameter between the Fresnel zone plate and image sensor to control the angle of view. By changing the distance from a first value to a second value, the system transitions between wide-angle and narrow-angle modes, directly linking parameter modification to functional change.
3Adaptability or versatility
If the pitch of the Fresnel zone plate is decreased to set a telephoto state, then the focal length is increased, but the manufacturing difficulty is increased
Solution Approach 1:
The patent applies dynamics by making the pitch of the Fresnel zone plate adjustable rather than fixed. The pitch can be dynamically changed to different values (first pitch for wide angle, second pitch for narrow angle) depending on the desired angle of view, allowing the system to adapt between wide-angle and telephoto states without permanent structural changes.
Solution Approach 2:
The patent applies parameter changes by varying the pitch parameter of the Fresnel zone plate to control the focal length. By changing the pitch from a first value to a second value, the system transitions between wide-angle and narrow-angle modes, directly linking parameter modification to functional change.
4Adaptability or versatility
If the Fresnel zone plate is separated from the image sensor to set a telephoto state, then the focal length is increased, but the image quality is decreased due to diffraction
Solution Approach 1:
The patent applies dynamics by making the distance between the Fresnel zone plate and image sensor adjustable. The distance can be dynamically changed to different values (first distance for wide angle, second distance for narrow angle) depending on the desired angle of view, allowing the system to adapt between wide-angle and telephoto states without permanent structural changes.
Solution Approach 2:
The patent applies parameter changes by varying the distance parameter between the Fresnel zone plate and image sensor to control the focal length. By changing the distance from a first value to a second value, the system transitions between wide-angle and narrow-angle modes, directly linking parameter modification to functional 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
Enables flexible angle of view adjustment while maintaining high image quality and refocusing functionality, reducing manufacturing difficulties and optical resolution losses.
Implementation Method 1
a coded aperture, an imaging element that outputs a signal indicating a projected image of a subject
Implementation Method 2
a lens that is attached to the imaging apparatus main body on a subject side from the coded aperture and changes an imaging angle of view
Implementation Method 3
an imaging element that outputs a signal indicating a projected image of a subject
Data Source
AI summary
An object of the present invention is provide a coded aperture imaging apparatus that has a refocusing function and can change an angle of view. An imaging apparatus includes an imaging apparatus main body including a coded aperture, an imaging element that outputs a signal indicating a projected image of a subject, and an image restoration unit that reconstructs an image of a spatial domain based on the signal, and a lens attached to the imaging apparatus main body on a subject side from the coded aperture and changes an imaging angle of view in a state where the lens is attached to the imaging apparatus main body with respect to an imaging angle of view in a state where the lens is not attached to the imaging apparatus main body, in which the projected image is formed on the imaging element by the lens and the coded aperture.