Optical Adhesive Film for Gap-Free Hologram Replication
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Solution Overview
Problem
Existing hologram replication methods face issues with optical contact between the light-sensitive composite web and adjacent components, leading to unwanted reflections, scattering, and quality impairments, while using index matching liquids increases complexity and safety concerns.
Innovation Solution
A method involving a temporary application of an optical adhesive film between the light-sensitive composite web and the master element or input coupling element to ensure optical contact, eliminating the need for index matching liquids and reducing reflections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If index matching liquids are used to improve optical contact between the composite web and master element, then optical quality is improved, but device complexity and safety concerns increase
Solution Approach 1:
The patent uses a disposable adhesive film instead of index matching liquids. The film is applied to the master element, serves its purpose during exposure, and is then removed and discarded. This eliminates the need for complex liquid handling systems, purification equipment, and safety infrastructure required for index matching liquids, while maintaining optical contact quality.
Solution Approach 2:
The adhesive film acts as an intermediary between the master element and the composite web. It provides the necessary optical contact during exposure while being easily removable afterward. This mediator approach replaces the problematic index matching liquids with a solid film that achieves the same optical coupling function without the associated complexity and safety issues.
2Manufacturing precision
If index matching liquids are used to reduce reflections and scattering, then hologram quality is improved, but additional cleaning steps and safety measures are required
Solution Approach 1:
The adhesive film is a single-use component that is applied, used for exposure, and then removed and discarded. This eliminates the need for cleaning steps required when using index matching liquids, simplifying the manufacturing process while maintaining hologram quality through effective optical contact during the critical exposure phase.
Solution Approach 2:
The patent converts the potential harm of residue and cleaning requirements into a benefit by using a removable adhesive film. The film's adhesive properties provide stable optical contact during exposure, and its removable nature eliminates cleaning steps. The原本的problem of residue is transformed into a controlled, temporary adhesive bond that serves the process well.
3Object-affected harmful factors
If optical adhesive film is used to provide gap-free contact, then reflections and scattering are minimized, but additional application steps are introduced
Solution Approach 1:
The adhesive film combines multiple functions into a single component: it provides mechanical bonding between the master element and composite web, ensures optical contact by eliminating gaps, and serves as a removable protective layer. This merging of functions into one element simplifies the overall system compared to using separate components for each function.
Solution Approach 2:
The patent uses a thin adhesive film that is flexible enough to conform to the master element surface while maintaining optical transparency. This thin film approach minimizes the additional complexity introduced by the film itself, as it adds minimal thickness and can be easily applied and removed without requiring complex application equipment.
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 optical adhesive film provides stable, gap-free transitions, enhancing hologram quality by minimizing reflections and scattering, allowing for seamless integration into end products without residue or additional cleaning steps.
Implementation Method 1
The optical adhesive film imparts optical contact between the master element and the light-sensitive composite web during the exposure
Implementation Method 2
object and reference beams interfere with one another in the light-sensitive material and form the replicated hologram
Implementation Method 3
a light-sensitive composite web on a surface of the master element, exposing the master element to replicate the at least one master hologram
Data Source
AI summary
A method for replicating a hologram in a light-sensitive composite web comprises providing a master element comprising a substrate body and at least one master hologram, applying a light-sensitive composite web on a surface of the master element, exposing the master element in order to replicate the at least one master hologram into the light-sensitive composite web and detaching the exposed composite web from the master element. The method also comprises the temporary application of an optical adhesive film between the light-sensitive composite web and the surface of the master element. The optical adhesive film imparts optical contact between the master element and the light-sensitive composite web during the exposure. Another method for replicating a hologram in a light-sensitive composite web comprises using an input coupling element, wherein an optical adhesive film is introduced between the composite web and the input coupling element.