Patterned Laser Projection for Low-Light Imaging Focus
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Solution Overview
Problem
Conventional imaging techniques for social structures like bridges, tunnels, and buildings face challenges in focusing due to lack of features and low illuminance, especially when imaging from high places or moving devices, and existing methods using laser pointers or holograms are inadequate.
Innovation Solution
An imaging assistance apparatus using patterned laser light for focusing control, comprising a laser light projection device, reception device, projection instruction device, and imaging device, which allows for precise focusing by projecting patterned light and controlling the imaging process through user operations.
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 laser projection device that directly projects patterned light onto the subject. This eliminates the need for complex holographic elements while maintaining the ability to provide auxiliary light for focusing control.
Solution Approach 2:
The patent changes the light projection parameters by using a laser device that can project patterned light (lines, grids, or dots) directly onto the subject. This parameter change from conventional auxiliary light to patterned laser projection enables focusing control without requiring a hologram plate.
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 provided which limits measurement precision
Solution Approach 1:
The patent segments the single light spot into multiple light spots arranged in specific patterns (lines, grids, or multiple dots). This segmentation provides multiple reference points for focusing control, significantly improving measurement precision compared to a single laser pointer spot.
Solution Approach 2:
The patent transitions from a zero-dimensional single point to one-dimensional lines or two-dimensional grids of light spots. This dimensional expansion provides more spatial reference points for accurate focusing control across different areas of the subject.
3Illumination intensity
If conventional imaging techniques are used in low illuminance environments, then imaging can be performed, but focusing control becomes difficult due to lack of features
Solution Approach 1:
The patent applies preliminary action by projecting patterned light onto the subject before the main imaging operation. This pre-projection creates visible focus features on the subject that guide the focusing control process, solving the problem of insufficient features in low illuminance environments.
Solution Approach 2:
The patterned light acts as an intermediary between the imaging system and the subject. It provides visible reference patterns that facilitate focusing control in low light conditions where the subject itself lacks sufficient visual features for accurate focusing.
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 and imaging in low illuminance environments by projecting patterned light, facilitating efficient imaging of social structures from various angles and positions, even when using moving devices.
Implementation Method 1
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
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.