Camera Lens Temperature Compensation via Motor Position
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Solution Overview
Problem
Existing methods for temperature compensation in cameras, particularly for focusing lenses, face challenges due to the difficulty in accurately measuring the absolute distance between the lens and the CCD, leading to low practicability and neglecting the impact of zoom lenses on imaging quality.
Innovation Solution
A method and apparatus for temperature compensation in cameras that utilize temperature sensors and motor position information to calculate and adjust lens movement positions, simplifying the process by using prestored correspondences and motor position data to determine displacement compensation values, thereby improving accuracy and practicability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature compensation is performed based on absolute distance between focusing lens and CCD, then imaging quality compensation accuracy is improved, but measurement difficulty and device complexity increase
Solution Approach 1:
The patent introduces motor position information as an intermediary parameter to indirectly determine lens position. Instead of directly measuring the absolute distance between lens and CCD, the system uses the motor's position data (which is easily obtainable) as a mediator to calculate lens displacement compensation, thereby resolving the measurement difficulty while maintaining compensation accuracy
Solution Approach 2:
The patent replaces the mechanical measurement system (direct distance measurement between lens and CCD) with an information-based system (using motor position information and prestored correspondences). This substitution eliminates the need for complex mechanical measurement while achieving the same compensation effect
2Manufacturing precision
If temperature compensation method uses absolute distance calculation, then compensation accuracy is improved, but ease of manufacture and implementation deteriorate
Solution Approach 1:
The patent performs preliminary action by pre-storing the correspondence relationship between motor position information and lens displacement compensation values. This pre-computed table or curve allows the system to directly query compensation values during actual operation without performing complex real-time calculations, significantly simplifying implementation while maintaining high compensation accuracy
Solution Approach 2:
The patent creates a simplified model by copying the essential compensation characteristics into a lookup table or correspondence relationship. Instead of implementing the complex physical measurement and calculation system, the system uses this copied information (motor position to compensation value mapping) to achieve the same compensation effect with much easier implementation
3Device complexity
If only focusing lens compensation is implemented, then device complexity is reduced, but imaging quality compensation completeness deteriorates
Solution Approach 1:
The patent applies universality by extending the temperature compensation method to cover both focusing lenses and zoom lenses using the same basic principle (motor position information + temperature information). This multi-functional approach ensures complete compensation for all lens types in the system while maintaining relatively simple device complexity through unified processing
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
Effectively compensates for imaging quality changes caused by temperature fluctuations, enhancing the camera's performance by simplifying the compensation process and considering the impact of both focusing and zoom lenses, resulting in improved image quality and high practicability.
Implementation Method 1
obtaining temperature information of a camera lens of the camera using a temperature sensor
Implementation Method 2
position information of a motor that controls a lens of the camera to move
Data Source
AI summary
A method and an apparatus for performing temperature compensation for a camera. The method includes: obtaining temperature information of a camera lens of the camera using a temperature sensor; obtaining a lens target movement position according to position information of a motor that controls a lens of the camera to move and the temperature information; and controlling, according to the obtained lens target movement position, a corresponding lens to move to a target movement position. According to the method and apparatus provided in this application, an imaging quality change, which is caused by a temperature change, of a camera can be compensated for using a simple and convenient method, and practicability is high.