Moveable-Beam Laser Objective Assembly for Precise Microsurgery
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Solution Overview
Problem
Existing laser objective assemblies in assisted reproduction technology (ART) are limited by fixed, static infrared beams, requiring manual movement of targets under the beam focus, which complicates precise laser microsurgery applications.
Innovation Solution
A modular, moveable-beam laser objective assembly with a dichroic mirror system, allowing for simultaneous movement of a laser beam and an indicator beam, controlled by piezoelectric actuators and magnetic supports, enabling precise targeting and positioning on a microscope turret.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed, static infrared beam is used in laser objective assemblies, then the device complexity is reduced, but the ease of operation deteriorates because manual movement of targets under the beam focus is required
Solution Approach 1:
The patent implements a moveable dichroic mirror mounted on a mirror frame that can be dynamically positioned using piezoelectric actuators. This dynamic mechanism allows the laser beam to be moved across the target field without manually moving the target, resolving the contradiction between ease of operation and device complexity by automating the positioning function.
Solution Approach 2:
The patent replaces manual mechanical target manipulation with an automated optical beam steering system. Piezoelectric actuators substitute for manual mechanical operations, enabling precise beam positioning through electrical control rather than mechanical target movement, thereby improving ease of operation while maintaining controlled device complexity.
2Productivity
If a moveable dichroic mirror system is implemented, then the productivity is improved through computer-controlled beam movement, but the device complexity increases due to additional components like piezoelectric actuators and magnetic supports
Solution Approach 1:
The dynamic mirror positioning system enabled by piezoelectric actuators allows computer-controlled movement of the laser beam across the target field, significantly improving productivity by eliminating manual target manipulation. The system achieves automated, precise beam steering that enhances operational efficiency despite the added complexity of dynamic components.
Solution Approach 2:
The restoring support mechanism using magnets or springs provides automatic restoration of the mirror frame to its neutral position, eliminating the need for additional active control mechanisms. This self-service feature helps manage device complexity by using passive mechanical restoration rather than requiring continuous active control for all mirror positions.
3Measurement precision
If an indicator beam system is added to show laser position, then the measurement precision is improved by providing visible indication, but the device complexity increases due to additional optical paths and components
Solution Approach 1:
The patent combines the laser beam path and indicator beam path through the same optical system and dichroic mirror. Both beams traverse the same optical components and are directed through the same objective lens, merging multiple functions into a unified optical path. This integration improves measurement precision by providing visible indication of laser position while minimizing the increase in device complexity through shared components.
Solution Approach 2:
The dichroic mirror serves multiple functions: it directs the infrared laser beam toward the target and simultaneously directs the visible indicator beam toward the camera. This multi-functionality allows the system to provide both laser operation and position indication through a single optical component, improving measurement precision without proportionally increasing device complexity.
4Adaptability or versatility
If the mirror frame is made moveable on two axes, then the adaptability is improved by enabling positioning at any point in the field, but the device complexity increases due to the kinematic support and constraint mechanisms
Solution Approach 1:
The mirror frame is designed to be dynamically movable on two axes (x and y) relative to the objective optical axis, enabling the laser beam to be positioned at any point in the target field. This dynamic positioning capability provides high adaptability for various laser microsurgery applications, achieved through piezoelectric actuators that control mirror frame displacement in both lateral directions.
Solution Approach 2:
The positioning system is segmented into independent control axes, with separate piezoelectric actuators controlling movement in the x-direction and y-direction independently. This segmentation allows precise control of the mirror frame position on each axis, achieving high adaptability for positioning while managing device complexity through modular, independent control mechanisms.
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
Enables precise, computer-controlled movement of the laser beam over the target field, enhancing the accuracy and efficiency of laser microsurgery operations in ART by maintaining a visible indicator of the laser position.
Implementation Method 1
a piezoelectric transducer configured to move the respective rod
Implementation Method 2
a restoring support configured to provide a restoring force to the mirror frame substantially perpendicular to its plane
Implementation Method 3
a dichroic mirror located within the objective body and positioned at an angle relative to the optical axis, the mirror configured to direct a laser beam through the objective
Implementation Method 4
The kinematic support comprises at least one linear actuator, each linear actuator comprising a rod configured to contact the mirror frame
Data Source
AI summary
The present invention provides, in various embodiments, a miniature movable-beam laser objective configured to fit within the very small dimensions of a standard objective. This small, portable movable-laser source allows the beam to be directed at a computer-generated target or at the spot of a focused target-designator beam.