Optical Displacement Sensor Lens Adjustment for Scheimpflug Condition
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Solution Overview
Problem
Conventional optical displacement sensors require labor-intensive adjustments and increased size due to the need to adjust multiple components to meet the Scheimpflug condition, complicating the manufacturing process.
Innovation Solution
The method involves adjusting the optical system by moving only the light-receiving lens to meet the Scheimpflug condition, reducing the need for additional mechanisms and simplifying the adjustment process, thereby reducing labor and size requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple components (light-receiving lens and CCD) are adjusted to meet the Scheimpflug condition, then focus accuracy is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent extracts the adjustment function from multiple components and concentrates it solely on the light-receiving lens. By removing the need to adjust the CCD position and orientation, the invention simplifies the adjustment mechanism while maintaining focus accuracy through single-component optimization.
Solution Approach 2:
The light-receiving lens is designed to perform multiple functions: it simultaneously achieves focus adjustment and Scheimpflug condition satisfaction. This multi-functional design eliminates the need for separate adjustment mechanisms for different optical requirements.
2Manufacturing precision
If multiple components are adjusted to meet the Scheimpflug condition, then optical performance is improved, but adjustment time and labor increase
Solution Approach 1:
The patent removes the time-consuming CCD adjustment step by extracting the adjustment function from the CCD and assigning it solely to the light-receiving lens. This reduces the number of adjustment operations from multiple steps to a single step.
Solution Approach 2:
The light-receiving lens is pre-designed with specific optical characteristics that enable it to satisfy the Scheimpflug condition when positioned correctly. This preliminary design preparation eliminates the need for iterative adjustments during assembly.
3Manufacturing precision
If multiple adjustment mechanisms are provided for meeting the Scheimpflug condition, then optical accuracy is improved, but the size of the sensor increases
Solution Approach 1:
The patent extracts the adjustment functionality from multiple mechanical mechanisms and consolidates it into a single light-receiving lens positioning system. This elimination of redundant mechanisms reduces the overall sensor volume while maintaining optical accuracy.
4Measurement precision
If multiple components are adjusted to meet the Scheimpflug condition, then measurement accuracy is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent extracts the adjustment requirement from multiple components and concentrates it on the light-receiving lens only. This simplification makes the manufacturing process easier while maintaining measurement accuracy through precise single-component positioning.
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 approach allows for easy and efficient adjustment of the optical displacement sensor, minimizing labor and facility size, while ensuring accurate focus and displacement measurement.
Implementation Method 1
a light-receiving lens 14 for imaging the reflected light on the light-receiving face 13a of the light-receiving element 13
Implementation Method 2
a laser diode 101a for radiating light to an object to be measured 106
Implementation Method 3
a projection lens 101b for collecting light from the laser diode 101a
Implementation Method 4
a CCD 103 for receiving the reflected light on a light-receiving face 103a
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
In an optical displacement sensor (10) having a predetermined optical system, the predetermined optical system is adjusted to meet the Scheimpflug condition. The predetermined optical system has a projection module (9) configured to project light onto an object to be measured (16); a light-receiving element (13) configured to receive reflected light reflected by the object to be measured (16) of light projected from the projection module (9); and a light-receiving lens (14) configured to image the reflected light onto the light-receiving element (13), the light-receiving lens being positioned between the object to be measured (16) and the light-receiving element (13). The adjustment method performs an adjustment by moving only the light-receiving lens (14) in a direction of an optical axis (Z1 direction) of the light-receiving lens (14) and in a direction perpendicular (X1 direction) to the direction of the optical axis of the light-receiving lens (14).