Patterned Laser Focusing for Low-Light Structure Imaging
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Solution Overview
Problem
Conventional techniques for focusing control using laser light struggle with the need for hologram plates and irradiate single light spots, making it difficult to achieve accurate focusing, especially in low illuminance environments and on structures with few features, such as social infrastructure, which are often imaged in varying directions or positions.
Innovation Solution
An imaging assistance apparatus and system that uses patterned laser light projected by a laser head with optical elements, controlled by a reception device and projection instruction device, to facilitate focusing control on structures, allowing for pattern recognition and accurate focusing even in low illuminance conditions, and enabling easy mounting on moving devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laser light is used as AF auxiliary light, then focusing control can be performed, but a hologram plate is required which increases device complexity
Solution Approach 1:
The patent extracts and removes the hologram plate from the system, replacing it with a simpler optical element that projects patterned light directly without requiring complex holographic components, thus reducing device complexity while maintaining focusing control capability
Solution Approach 2:
The patent changes the optical parameters by using a different optical element configuration that generates patterned light through geometric projection rather than holographic interference, achieving the same focusing assistance function with simpler components
2Measurement precision
If a laser pointer is used to set focus position, then focusing control can be performed, but only a single light spot is irradiated which limits measurement precision
Solution Approach 1:
The patent segments the single light spot into multiple light spots arranged in a predetermined pattern, allowing the imaging device to capture and analyze multiple reference points simultaneously, thereby improving focusing control accuracy through pattern recognition
Solution Approach 2:
The patent transitions from a one-dimensional single spot to a two-dimensional patterned arrangement of multiple spots, enabling spatial pattern recognition that enhances the precision of focusing control by providing more reference information
3Measurement precision
If patterned laser light is projected for focusing control, then focusing accuracy on structures with few features is improved, but the projection must be precisely controlled which increases device complexity
Solution Approach 1:
The patent employs a control device that automatically manages the projection timing and coordination between the laser light projection device and imaging device, allowing the system to self-regulate the complex coordination without requiring additional manual intervention or complex external control systems
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 accurate focusing control on structures with few features, even in low illuminance, by using patterned laser light for recognition and focusing, improving imaging quality and ease of handling on moving platforms.
Implementation Method 1
a laser light source that generates laser light
Data Source
AI summary
In one aspect, an imaging assistance apparatus includes: a laser light projection device having a laser light source that generates laser light and a laser head provided with an optical element that projects the laser light as patterned light having a determined pattern; a reception device that receives a first operation; a projection instruction device that instructs the laser light projection device during laser light projection to end the projection of the patterned light, on the basis of the first operation; and an imaging instruction device that instructs an imaging device to image a subject on which focusing control is performed, on the basis of the first operation.