Light Beam Focusing Assembly With Electromagnetic Braking
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Solution Overview
Problem
Existing focusing devices for light beams struggle to quickly reach and maintain the desired focusing position, especially under conditions of knocks or vibrations, often requiring complex electronic feedback systems that can lead to undesired resonance phenomena.
Innovation Solution
A focusing device utilizing a control circuit to selectively short-circuit a second electrical winding when the optical assembly reaches the desired focusing position, generating a braking force to stabilize the position, and using electromagnetic induction to oppose movement, thereby eliminating the need for continuous electronic feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronic feedback systems are used to maintain focusing position, then stability is improved, but device complexity increases and resonance phenomena occur
Solution Approach 1:
The patent extracts and eliminates the complex electronic feedback system from the focusing device, replacing it with a passive electromagnetic damping mechanism. The second electrical winding is configured to generate braking force through electromagnetic induction without requiring active feedback control electronics, thereby simplifying the device while maintaining stability.
Solution Approach 2:
The focusing device uses its own electromagnetic components (permanent magnet and electrical windings) to automatically generate the braking force needed for stabilization. The system serves itself by utilizing electromagnetic induction from the motion of the optical assembly to create the necessary damping effect, eliminating the need for external feedback control systems.
2Measurement precision
If electronic feedback systems are used to correct position deviations, then focusing accuracy is improved, but undesired resonance phenomena are generated
Solution Approach 1:
The patent converts the harmful resonance phenomena into a beneficial damping effect. By configuring the second electrical winding to be short-circuited, the electromagnetic induction generated by optical assembly motion creates a braking force that opposes and dampens vibrations, transforming potential resonance into useful vibration suppression.
3Productivity
If the optical focusing assembly is moved quickly to reach focusing position, then productivity is improved, but stability under vibrations deteriorates
Solution Approach 1:
The patent implements a two-phase operation: a quick movement phase to reach the focusing position followed by an automatic stabilization phase. The electromagnetic braking force activates during motion and continues to dampen vibrations after arrival, allowing rapid positioning while maintaining stability under disruptive conditions.
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
The device achieves rapid and stable focusing by minimizing resonance and reducing the need for complex electronic systems, ensuring quick and precise adjustment even under disruptive conditions.
Implementation Method 1
Each of the second electrical windings (46) is configured to be short-circuited so as to generate, due to the electromagnetic induction generated by the relative motion between the at least one permanent magnet and the second electrical winding (46), a braking force that opposes the movement of the optical assembly (20)
Data Source
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AI summary
A device (10) for focusing a light beam comprises a optical assembly (20) comprising at least one focusing lens and/or mirror (22), a support structure (30) which supports the optical assembly (20), a magnetic actuator (40) configured to move the optical assembly (20) with respect to the support structure (30) along a moving direction substantially parallel to an optical axis (X) of the optical assembly (20) and at least one position sensor (60) configured to provide an indication of the position of the optical assembly (20) with respect to the support structure (30). The magnetic actuator (40) comprises at least one permanent magnet (42) integrally associated with the optical assembly (20) and at least one first electrical winding (44) integrally associated with the support structure (30) and configured to cause flowing of an electric current within it, wherein the electrical current interacts with said at least one permanent magnet (42) and causes the movement of the optical assembly (20) along said moving direction until the optical assembly (20) is brought to a desired focusing position. The focusing device (10) comprises at least one second electrical winding (46) integrally associated with the support structure (30) and configured to be short- circuited so as to generate, due to the electromagnetic induction generated by the relative motion between said at least one permanent magnet (42) and said at least one second electrical winding (46), a braking force that opposes the movement of the optical assembly (20) along said moving direction.