Dome Camera IR Bushing Coating to Prevent Reflection Shift
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Solution Overview
Problem
Dome cameras experience issues with infrared (IR) light being diffusely reflected on the inner circumference of the dome cover and incident on the lens module, leading to impaired image capture and potential changes in the surveillance direction due to friction and deformation of the IR diffuse reflection prevention bushing.
Innovation Solution
The dome camera incorporates IR light-emitting diodes spaced around the lens module, a dome cover made of transparent material, an IR diffuse reflection prevention bushing with a urethane-coated front side to reduce friction, and a step on the rear side to prevent separation, ensuring efficient IR light prevention and stable lens module direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an IR diffuse reflection prevention bushing is introduced to prevent IR light from being reflected on the dome cover, then IR light reflection prevention is improved, but frictional force between the dome cover and bushing increases causing surveillance direction change
Solution Approach 1:
A grease layer is introduced as an intermediary substance between the dome cover and the IR diffuse reflection prevention bushing. This grease layer reduces the frictional force between the dome cover and the bushing, preventing the surveillance direction from changing while maintaining the IR light reflection prevention function of the bushing.
2Object-affected harmful factors
If the IR diffuse reflection prevention bushing is made to contact the dome cover closely to prevent IR light, then IR light blocking is improved, but the bushing deforms due to friction when dome cover is mounted
Solution Approach 1:
The grease layer acts as a mediator between the dome cover and the bushing, reducing frictional forces during mounting. This prevents deformation of the bushing while maintaining close contact necessary for IR light prevention.
Solution Approach 2:
The grease layer changes the friction parameter between the dome cover and bushing, reducing it to a level that prevents deformation during mounting while allowing the bushing to maintain its position for effective IR light blocking.
3Reliability
If the dome cover is mounted to protect the camera, then protection function is improved, but frictional force changes the surveillance direction of the lens module
Solution Approach 1:
The grease layer serves as an intermediary that reduces friction between the dome cover and the bushing during mounting. This ensures the dome cover can be mounted to provide protection without generating excessive frictional forces that would alter the surveillance direction of the lens 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
Prevents IR light from being diffusely reflected on the dome cover and reduces frictional forces, maintaining the surveillance direction and preventing deformation, thus ensuring accurate image capture and improved user convenience.
Implementation Method 1
a front side of the IR diffuse reflection prevention bushing in close contact with the inner circumference of the dome cover may be coated with urethane to reduce a frictional force between the inner circumference of the dome cover and the front side of IR diffuse reflection prevention bushing
Implementation Method 2
a plurality of IR light-emitting diodes which are installed to be spaced apart from each other around an outer circumference of the lens module and emit IR light
Implementation Method 3
IR light is diffusely reflected on an inner circumference of a dome cover and is incident on a lens module, and thus a problem that a normal image cannot be captured occurs
Data Source
AI summary
The present invention relates to a dome camera with an IR diffuse reflection prevention function to efficiently prevent infrared (IR) light from being diffusely reflected on an inner circumference of a dome cover and being incident on a lens module and prevent a surveillance direction of the lens module from being changed or an IR diffuse reflection prevention bushing from being deformed by reducing a frictional force between the inner circumference of the dome cover and a front side of the IR diffuse reflection prevention bushing when the dome cover is mounted.