Deformable Mirrors for Precise Holographic Optical Element Manufacturing
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Solution Overview
Problem
Manufacturing holographic optical elements with low tolerances is challenging and often requires high technical expenditure, especially with multiple optical components.
Innovation Solution
A device using deformable mirrors and an interference light beam to generate holographic optical elements, allowing simultaneous exposure of multiple elements with precise control over wavefronts and alignment, facilitated by a control unit and components like dichroic mirrors and focusing elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple optical components are used to manufacture holographic optical elements with low tolerances, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple optical functions into a single deformable mirror. The deformable mirror integrates wavefront correction, beam divergence control, and holographic element generation that would traditionally require multiple separate optical components. This merging reduces the number of components while maintaining manufacturing precision through the mirror's programmable surface deformation capabilities
Solution Approach 2:
The deformable mirror provides dynamic control over the light beam properties through programmable surface deformation. By dynamically adjusting the mirror surface shape via actuators, the system can precisely control wavefronts and beam divergence angles without requiring multiple fixed optical components, thereby reducing device complexity while maintaining high manufacturing precision
2Productivity
If multiple holographic optical elements are manufactured simultaneously, then productivity is improved, but manufacturing precision may deteriorate due to mutual influence
Solution Approach 1:
The patent segments the light beam into multiple independent partial light beams, each directed to a different region of the holographic film. The deformable mirror independently controls the wavefront of each partial beam, ensuring that simultaneously manufactured holographic elements do not mutually influence each other. This segmentation enables parallel production while maintaining precision by isolating each element's formation process
Solution Approach 2:
The deformable mirror acts as an intermediary that independently shapes and directs each partial light beam before it reaches the holographic film. By controlling the wavefront and divergence of each beam separately through the mirror's programmable surface, the system prevents mutual interference between simultaneously exposed elements while maintaining high manufacturing precision across multiple elements
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 high-quality holographic optical elements with minimal optical errors and flexible manufacturing, suitable for personalized applications like smart glasses, by ensuring precise alignment and adaptation of properties.
Implementation Method 1
the deformable mirrors may each be actuated by the control unit so as to change a wavefront of the partial light beam
Implementation Method 2
The deformable mirrors are situated in such a way that each mirror reflects one partial light beam in each case and directs the reflected partial light beam onto the holographic film
Implementation Method 3
the holographic optical elements are generated by interference of the interference light beam with the at least two reflected partial light beams simultaneously
Implementation Method 4
a light source, which in particular has a high longitudinal coherence
Data Source
AI summary
A device and a method for manufacturing holographic optical elements. The device includes at least two partial light beams and one interference light beam, one deformable mirror in each case per partial light beam, a control unit, which is configured to actuate the deformable mirrors to adapt a wavefront of the partial light beam, and a holographic film. The deformable mirrors are situated so as to each reflect precisely one partial light beam and to direct the reflected partial light beam on the holographic film, and the interference light beam being directed on the holographic film to interfere with the reflected partial light beams so as to simultaneously generate at least two holographic optical elements.