Distance Detection Device Lens Mounting for Vignetting Elimination
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Solution Overview
Problem
Existing distance detection devices in imaging apparatuses face vignetting issues due to configuration members like lens barrels blocking the distance measurement light, limiting the acquisition of accurate distance information across the entire captured image.
Innovation Solution
A distance detection device is attached to the imaging apparatus at a position surrounding the lens device, comprising a light emitting unit, a light receiving unit, and a communication unit, which irradiates and receives light without obstruction, allowing for accurate distance information acquisition across the entire image angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the distance measurement light irradiator is disposed in the imaging apparatus main body, then the structure is compact and integrated, but the distance measurement light is blocked by the lens barrel causing vignetting
Solution Approach 1:
The distance measurement light irradiator is extracted from the imaging apparatus main body and attached to the lens device. This extraction resolves the vignetting problem caused by the lens barrel blocking the light, while maintaining functional integration through the attachment relationship.
Solution Approach 2:
The lens device serves as an intermediary carrier between the imaging apparatus main body and the distance measurement light irradiator. By attaching the irradiator to the lens device, the system achieves both compact integration and unobstructed light path.
2Device complexity
If the distance measurement light irradiator is disposed in the imaging apparatus main body, then the integration is achieved, but the entire imaging range cannot be irradiated
Solution Approach 1:
The irradiator is extracted from the main body and repositioned on the lens device, enabling the entire imaging range to be irradiated without obstruction from internal components.
Solution Approach 2:
The irradiator is positioned in a different spatial dimension (on the lens device rather than inside the main body), which allows the light to reach the entire imaging range without being blocked by the lens barrel.
3Reliability
If the distance measurement light is blocked by the lens barrel, then the internal structure is protected, but the distance image cannot be acquired in the blocked region
Solution Approach 1:
The irradiator is extracted from the main body and positioned on the lens device, eliminating the blocking issue while maintaining structural integrity through the attachment mechanism.
Solution Approach 2:
The distance measurement function is copied to the lens device, creating a redundant but functional placement that avoids the blocking problem while preserving the original structural benefits.
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
The solution enables unobstructed irradiation and reception of distance measurement light, ensuring accurate distance information acquisition without vignetting, thereby enhancing the precision of distance images and supporting three-dimensional image synthesis.
Implementation Method 1
The time of flight (TOF) scheme is a method of performing irradiation with distance measurement light from an imaging apparatus toward an object and calculating the distance on the basis of a time required by an imaging element for acquiring a distance image to receive the reflected light thereof
Implementation Method 2
The infrared light reflected by the object is received by the imaging element, and a time difference between a timing of the irradiation in the irradiation pattern and a timing of the light reception is detected
Data Source
AI summary
Provided is a distance detection device attached to a position at which it surrounds a camera lens device. The distance detection device has a light emitting element configured to irradiate a target region with irradiation light and a light receiving element configured to receive reflected light of the irradiation light from a target in the target region. The distance detection device acquires distance information indicating a distance to the target on the basis of a time until the light receiving element receives the reflected light after the light emitting element performs irradiation with the irradiation light and communicates the distance information.