Beam Deflection Device for Laser Pattern Generation
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Solution Overview
Problem
Current beam deflection devices for laser devices are inefficient in generating laser patterns, particularly in ophthalmological applications, as they can be time-consuming and prone to imaging errors and vibrations, especially when creating rotationally symmetrical patterns.
Innovation Solution
A beam deflection device combining a reflecting or dispersive beam offset element with a rotating, dispersive optical element, such as a Risley prism pair, to spatially offset and rotate the laser beam, allowing for more efficient generation of laser patterns while minimizing imaging errors and vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a beam offset element is used to generate rotationally symmetrical patterns, then the laser pattern can be generated, but high times are taken up and imaging errors arise
Solution Approach 1:
The beam deflection device is segmented into two functional components: a beam offset element for spatial offsetting and a rotating dispersive optical element for pattern generation. This segmentation allows each component to perform its specific function efficiently, avoiding the time-consuming and error-prone process of using a single element to achieve both offsetting and rotational symmetry.
Solution Approach 2:
A rotating dispersive optical element (such as a Risley prism pair) is introduced as an intermediary component between the beam offset element and the final laser pattern. This intermediary element transforms the offset beam into the desired rotationally symmetrical pattern through controlled rotation and dispersion, eliminating imaging errors while maintaining efficiency.
2Device complexity
If small mirrors are used as beam offset element, then the device size is reduced, but only small rotation patterns can be generated
Solution Approach 1:
The system transitions from two-dimensional beam offsetting (using mirrors) to three-dimensional pattern generation by introducing rotational motion of the dispersive optical element. This dimensional change enables the generation of various rotation patterns (0°, 45°, 90°, 180°) regardless of the beam offset element size, as the rotation occurs in a different dimensional space.
Solution Approach 2:
The rotating dispersive optical element serves multiple functions: it acts as a beam modifier, a pattern generator, and a rotation controller. This multi-functional component can generate different rotation patterns by changing its orientation, making the system adaptable to various laser pattern requirements without requiring different beam offset element sizes.
3Manufacturing precision
If reflecting mirrors are used to generate rotationally symmetrical pattern, then the pattern can be created, but high times are taken up
Solution Approach 1:
The mechanical rotation of mirrors is replaced with a rotating dispersive optical element that utilizes optical dispersion and refraction properties. This substitution eliminates the need for complex mechanical mirror rotations while achieving the same rotationally symmetrical patterns faster and with fewer imaging errors, as the optical element can be rotated at higher speeds with greater precision.
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 combination enables faster and more precise generation of laser patterns, reducing the time required for treatments like ophthalmological procedures and allowing for a wider range of pattern configurations, including complex ones, without the limitations of individual components.
Implementation Method 1
at least one reflecting or dispersive beam offset element, which is formed for spatially offsetting the laser beam in relation to an optical axis
Implementation Method 2
a rotating, dispersive optical element, which is formed for generating a rotation pattern as the laser pattern from the previously offset laser beam
Data Source
AI summary
A beam deflection device for a laser device is disclosed for generating a laser pattern on or in a material by means of a laser beam) of the laser device. The beam deflection device includes at least one reflecting or dispersive beam offset element, which is formed for spatially offsetting the laser beam in relation to an optical axis of a laser generating device of the laser device. The beam deflection device further includes a rotating, dispersive optical element, which is formed for generating a rotation pattern as the laser pattern from the previously offset laser beam. Further, a laser device, a computer program as well as to a computer-readable medium are disclosed.