Stitching Measurement Device for Concave Spherical Lenses
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Solution Overview
Problem
Existing stitching interferometers have low detection precision due to the need to incline the concave spherical object being measured, which causes deformation and affects measurement accuracy.
Innovation Solution
A stitching-measurement device comprising an interferometer, reference lens, plane mirrors, adjustment mechanisms, and a motion table, where the included angle between plane mirrors is adjusted to incline the light beam relative to the object, avoiding the need to incline the object itself, allowing precise measurement without deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the concave spherical object to be measured is inclined to match the state of the standard lens, then the stitching-measurement can be performed, but the object is deformed and measurement precision is reduced
Solution Approach 1:
Instead of inclining the object to be measured to match the standard lens state, the patent inverts the approach by keeping the object horizontal and inclining the light beam through adjustment of plane mirrors. This inversion eliminates deformation of the object while achieving the same measurement capability.
Solution Approach 2:
The patent introduces plane mirrors as intermediary elements between the light source and the object. By adjusting the included angle between plane mirrors, the light beam is inclined without physically inclining the object, thus avoiding deformation while enabling stitching-measurement.
2Productivity
If the concave spherical object to be measured is inclined during stitching-measurement, then the measurement can be completed, but deformation is generated and incorporated into the measurement result
Solution Approach 1:
The patent inverts the conventional approach by keeping the object horizontal and inclining the light path instead. This allows the stitching-measurement to be completed while avoiding any deformation of the object that would contaminate the measurement results.
Solution Approach 2:
The patent replaces the mechanical action of inclining the object with an optical adjustment of the light beam using plane mirrors. This substitution eliminates mechanical deformation while maintaining the ability to perform stitching-measurement.
3Adaptability or versatility
If the concave spherical object to be measured is inclined by an angle, then the state matches the standard lens, but the object deformation directly affects measurement result
Solution Approach 1:
The patent inverts the approach by keeping the object in its natural horizontal state and achieving the matching effect through optical means - inclining the light beam by adjusting plane mirrors. This maintains adaptability to match standard lens state while preserving measurement accuracy.
Solution Approach 2:
Plane mirrors serve as intermediaries that enable the object to match the standard lens state without physical inclination. The mirrors adjust the light path to create the appropriate measurement geometry while the object remains undeformed.
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 enables high-precision stitching detection by avoiding deformation errors and reduces design complexity in tooling the object, achieving accurate measurement of concave spherical lenses without inclining them.
Implementation Method 1
an interferometer, a reference lens
Implementation Method 2
a first plane mirror, a second plane mirror... so that light beam incident on the concave spherical object to be measured is inclined
Data Source
AI summary
Disclosed is a stitching-measurement device adapted for performing stitching-measurement on a surface of a concave spherical lens, including: an interferometer, a reference lens, a first plane mirror, a second plane mirror, a first adjustment mechanism, a second adjustment mechanism, a concave spherical object to be measured, a motion table and a control mechanism, the first plane mirror being mounted on the first adjustment mechanism configured to change a position of the first plane mirror; the second plane mirror being mounted on the second adjustment mechanism configured to change a position of the second plane mirror; the concave spherical object to be measured being placed on the motion table configured to change a position of the concave spherical object to be measured; the control mechanism communicating with the interferometer, the first adjustment mechanism, the second adjustment mechanism, and the motion table for issuing control signals, wherein by the first adjustment mechanism and the second adjustment mechanism, an included angle between the first plane mirror and the second plane mirror is adjusted in such a way that light beam incident on the concave spherical object to be measured is inclined by a first angle relative to light beam emitted from the reference lens, thereby avoiding an operation of inclining the concave spherical object to be measured during the stitching-measurement.