Optical Module Lens Recess to Prevent Vibration Attenuation
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Solution Overview
Problem
Existing optical devices face vibration attenuation issues due to the position of inner-layer optical components, which affects the removal of foreign matter from translucent bodies, as acoustic waves generated by vibration can lead to compression and damping, reducing the effectiveness of foreign matter removal.
Innovation Solution
The optical module incorporates a tubular vibrator with a piezoelectric element and an inner-layer optical component featuring a recessed lens with curvature, creating a gap between the translucent body and the inner-layer lens to disperse acoustic waves and reduce acoustic pressure, thereby preventing vibration attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the inner-layer optical component is positioned close to the translucent body, then the device structure is compact, but acoustic pressure concentrates and causes vibration attenuation
Solution Approach 1:
The inner-layer lens surface facing the translucent body is designed with a curved shape including a recess. This curvature disperses the acoustic waves generated by vibration of the translucent body, preventing concentration of acoustic pressure that would otherwise cause vibration attenuation and reduce the effectiveness of foreign matter removal.
2Reliability
If a gap is created between the translucent body and inner-layer lens, then vibration attenuation is prevented, but the device structure becomes more complex
Solution Approach 1:
Rather than creating a simple gap, the patent employs a curved recess on the inner-layer lens surface. This curvature design achieves the dual benefit of maintaining an effective spacing (gap) to prevent acoustic pressure concentration while integrating the feature into the lens structure itself, minimizing additional structural complexity.
3Ease of manufacture
If the inner-layer lens has a flat surface, then manufacturing is simpler, but acoustic waves concentrate causing vibration attenuation
Solution Approach 1:
The inner-layer lens is designed with a curved surface including a recess on the side facing the translucent body. This curvature disperses acoustic waves to prevent concentration and vibration attenuation. The curved surface can be manufactured using standard optical molding or grinding techniques, balancing manufacturing feasibility with acoustic wave dispersion requirements.
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 configuration enhances the displacement of the translucent body, improving the removal efficiency of foreign matter such as raindrops and maintaining optical characteristics by reducing vibration attenuation and acoustic pressure concentration.
Implementation Method 1
a piezoelectric element located at the vibrator to vibrate the vibrator
Implementation Method 2
a first recess that is recessed in a thickness direction of the inner-layer lens and includes a curvature on a surface of the inner-layer lens facing the translucent body
Implementation Method 3
generating a bending vibration in the dome portion... removing liquid droplets and the like adhering to the surface
Data Source
AI summary
An optical module includes a translucent body, a vibrator that is tubular and supports the translucent body, a piezoelectric element located at the vibrator to vibrate the vibrator, and an inner-layer optical component at an inner side portion of the vibrator. The inner-layer optical component includes an inner-layer lens that faces the translucent body, a recess that is recessed in a thickness direction of the inner-layer lens and includes a curvature on a surface of the inner-layer lens facing the translucent body, and a gap is located between the translucent body and the recess of the inner-layer lens.