Image Sensor Fixation to Beamsplitter Using Two-Step UV Curing
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Solution Overview
Problem
Accurate positioning and secure fixation of image sensors relative to a beamsplitter in digital video cameras are challenging due to environmental and production factors, such as temperature, humidity, and internal stress, which affect image quality and increase material costs and complexity.
Innovation Solution
A two-step positioning process using a UV curing adhesive as the first fixative agent to initially fix the image sensor's position, followed by a second fixative agent like solder or epoxy, with wedge-shaped configurations to ensure precise alignment and stability, minimizing displacement and shrinkage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single fixation method is used to attach image sensors to a beamsplitter, then the manufacturing process is simple, but positioning accuracy deteriorates due to environmental factors and internal stress
Solution Approach 1:
The fixation process is divided into two distinct stages: initial positioning using a first fixative agent, and final securing using a second fixative agent. This segmentation allows each stage to optimize for its specific function, achieving both high positioning accuracy and stable fixation without excessive complexity
Solution Approach 2:
The first fixative agent is applied to perform preliminary positioning of the image sensor relative to the beamsplitter, establishing accurate alignment before the second fixative agent provides permanent fixation. This preliminary action ensures positioning accuracy is achieved before final securing
2Strength
If strong adhesives are used to secure image sensors, then fixation strength is improved, but internal stress causes displacement and reduces positioning accuracy
Solution Approach 1:
The fixation system uses two different fixative agents with different properties: the first provides initial positioning with minimal stress, while the second provides strong fixation. This segmentation prevents the strong adhesive from causing displacement during the positioning phase
Solution Approach 2:
The first fixative agent performs the preliminary positioning function with minimal internal stress, establishing accurate alignment before the second strong fixative agent is applied for final fixation, thus avoiding displacement caused by strong adhesives during positioning
3Productivity
If multiple image sensors are positioned manually, then flexibility is maintained, but time consumption and cost increase
Solution Approach 1:
The first fixative agent enables preliminary positioning that can be performed manually or with simplified fixtures, establishing accurate positions before final fixation. This preliminary action reduces the complexity and time of the overall process compared to fully manual positioning
Solution Approach 2:
The first fixative agent acts as an intermediary that facilitates easy positioning during assembly, allowing sensors to be positioned and adjusted before permanent fixation with the second agent, thus improving productivity without requiring complex automated positioning systems
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 method achieves high initial fixation accuracy and stability, allowing for precise control of image sensor positioning up to 0.5 micrometers, reducing contamination and increasing yield while maintaining stability against external forces and humidity.
Implementation Method 1
placing a first fixative agent comprising a UV adhesive between the image sensor and the beamsplitter and positioning the image sensor relative to the beamsplitter. The position of the image sensor is initially fixed relative to the beamsplitter by the first fixative agent
Data Source
AI summary
Exemplary embodiments of the present invention relate to a method for fixing an image sensor to a beamsplitter. An exemplary method comprises placing a first fixative agent comprising an ultraviolet adhesive between the image sensor and the beamsplitter and positioning the image sensor relative to the beamsplitter. The position of the image sensor is initially fixed relative to the beamsplitter by the first fixative agent. The exemplary method further comprises securing the image sensor to the beamsplitter with a second fixative agent.