Movable Lens Array Laser Module for Wider Depth Camera FOV
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Solution Overview
Problem
Existing depth cameras face challenges in increasing the field of view of emitted laser beams without increasing the optical power, which leads to overheating issues and reduced long-term operation.
Innovation Solution
A laser emitting module with a movable laser deflection assembly, comprising a first and second lens array assembly, allows for adjustment of the laser beam's angle of deviation by translating the second lens array assembly relative to the first, effectively increasing the field of view without increasing optical power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the optical power of the laser beam is increased to increase the field of view, then the field of view is improved, but the heat generation increases and long-time operation becomes difficult
Solution Approach 1:
The patent applies the dynamics principle by making the lens array movable relative to the laser beam path. The lens array can be translated along the optical axis to dynamically adjust the field of view without increasing laser power. This dynamic adjustment allows the system to expand or contract the illuminated area as needed, resolving the contradiction between field of view and heat generation.
Solution Approach 2:
The patent changes the parameter of lens array position along the optical axis to control the field of view. By translating the lens array to different positions, the system alters the effective focal length and beam divergence, thereby adjusting the field of view coverage without increasing the optical power of the laser source.
2Area of stationary object
If the optical power of the laser beam is increased to increase the field of view, then the field of view is improved, but the electric power consumption increases
Solution Approach 1:
The movable lens array provides a dynamic mechanism to adjust field of view coverage without increasing laser diode power consumption. The system achieves variable field of view by mechanical translation of the lens array rather than by increasing electrical power input to the laser source.
Solution Approach 2:
The patent replaces the electrical approach (increasing laser power) with a mechanical approach (translating the lens array). This substitution allows field of view adjustment through mechanical position changes of the lens array, avoiding increased electrical power consumption in the laser emitting module.
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
This solution enables the depth camera to increase the field of view of the laser beam without overheating, ensuring long-term operation and maintaining power efficiency.
Implementation Method 1
a laser deflection assembly is at the beam outlet and is movable relative to the beam outlet, the laser deflection assembly is configured to change an angle of deviation of the laser beam emitted from the beam outlet when the laser deflection assembly is translated relative to the beam outlet
Data Source
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AI summary
The disclosure provides a laser emitting module, a depth camera and an electronic device, and belongs to the technical field of electronics. The laser emitting module includes an emitting assembly (11) and a laser deflection assembly (12), the emitting assembly (11) has a beam outlet (11a), and the beam outlet (11a) is configured to emit a laser beam, the laser deflection assembly (12) is at the beam outlet (11a) and is movable relative to the beam outlet (11a), the laser deflection assembly (12) is configured to change an angle of deviation of the laser beam emitted from the beam outlet (11a) when the laser deflection assembly (12) is translated relative to the beam outlet (11a), and an included angle is between a translation direction of the laser deflection assembly (12) and a center line of the laser beam emitted from the beam outlet (11a). According to the disclosure, a field of view of the emitted laser beam can be increased.