Variable Refractive Power Focusing Device for Test Object Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for determining the position of test objects, particularly lens systems, require linear guides and interchangeable optical systems, leading to inefficient and time-consuming centering error measurements.
Innovation Solution
A system comprising an autocollimation telescope, a beam splitter, a detector unit, and a focusing device with a variable refractive power, allowing for simultaneous focusing on multiple test surfaces without mechanical movement, enabling rapid and precise determination of centering errors without additional optical systems or linear guides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If linear guides and interchangeable optical systems are used to measure multiple test surfaces, then measurement coverage is improved, but device complexity and measurement time increase
Solution Approach 1:
The patent employs a dynamic focussing device with variable refractive power that can rapidly change its focal length to focus on different test surfaces. This dynamic adjustment replaces the need for mechanical movement of optical systems or test pieces, allowing a single optical system to measure multiple surfaces at different positions along the optical axis without requiring linear guides or interchangeable components
Solution Approach 2:
The focussing device is designed to perform multiple functions: it can focus on any test surface along the optical axis by adjusting its refractive power, eliminating the need for separate measurement systems for different surfaces. The single autocollimation telescope with variable focussing capability serves as a universal measurement tool for all test surfaces
2Adaptability or versatility
If linear guides and interchangeable optical systems are used to measure multiple test surfaces, then measurement coverage is improved, but measurement speed decreases
Solution Approach 1:
The focussing device rapidly adjusts its refractive power to focus on different test surfaces without mechanical movement, enabling quick switching between measurements. This dynamic focussing capability significantly reduces the time required to measure multiple surfaces compared to systems requiring physical repositioning or component changes
Solution Approach 2:
The patent replaces mechanical systems (linear guides, movable optical components, interchangeable lens systems) with an optical-focussing-based solution. The variable refractive power focussing device achieves the same measurement coverage without mechanical movement, thereby eliminating the time losses associated with mechanical repositioning and component changes
3Device complexity
If a single focussing device with variable refractive power is used to focus on multiple test surfaces, then device complexity is reduced, but focusing precision may be compromised
Solution Approach 1:
The focussing device changes its refractive power parameter to focus on different test surfaces. By precisely controlling the refractive power parameter, the device achieves accurate focus on multiple surfaces at different positions along the optical axis while maintaining measurement precision comparable to fixed-focussing systems
Solution Approach 2:
The patent replaces mechanical adjustment mechanisms with an optical focussing mechanism based on variable refractive power. This substitution maintains focusing precision through optical control while eliminating the mechanical complexity and potential alignment errors associated with mechanical systems
4Measurement precision
If mechanical movement systems are used to adjust test piece position, then measurement accuracy is improved, but measurement time and structural complexity increase
Solution Approach 1:
The patent replaces mechanical movement systems with an optical focussing system. The variable refractive power focussing device adjusts focus on different test surfaces through optical means rather than mechanical repositioning, thereby maintaining measurement accuracy while eliminating the time losses associated with mechanical adjustment and the structural complexity of mechanical guides and actuators
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 rapid and accurate determination of test object positions, reducing measurement time and structural complexity, enabling faster and more precise adjustment of optical components, even when mounted on non-revolving stages or with limited accessibility.
Implementation Method 1
a beam splitter
Implementation Method 2
an objective lens
Implementation Method 3
an optical element embodied as a focussing device, which can be controlled by a control device in such a way that the beam can be focussed onto a centre of curvature of a first test surface of the test object
Data Source
AI summary
The invention relates to a system for determining the position of a test object comprising the following features: an autocollimation telescope having a beam source for emitting a beam; a beam splitter; a detector unit and an objective lens; and an optical element embodied as a focusing device, wherein the test object, the beam source and the focusing device are arranged along a common optical axis (z), and a control device for controlling the focusing device, which is designed in such a way that the beam can be focused onto a center of curvature of a first test surface of the test object with the coordinates (x1, y1) and at least onto a center of curvature of a second test surface of the test object with coordinates (x2, y2).