Bonded Reflective Optical Assembly for Dust-Shielded Laser Mirrors
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Solution Overview
Problem
Optical elements in laser processing apparatuses, such as mirrors with reflective films, deteriorate due to charge generation and adsorption of dust or gas, leading to frequent replacements and quality loss of laser beams.
Innovation Solution
An optical element assembly comprising a first and second optical element, where one element has a reflective surface coated with a film, and the other is bonded to shield the reflective surface from ambient air, using configurations like right-angle prisms or flat plates with reflective coatings and bonding to prevent dust and gas adsorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a reflective film is coated on the optical element surface, then the laser beam reflection efficiency is improved, but the reflective surface generates charge that adsorbs dust or gas leading to frequent replacement
Solution Approach 1:
The optical element is divided into two separate elements: the first optical element maintains the reflective film for laser beam reflection, while the second optical element serves as a protective cover that shields the reflective surface from ambient air. This segmentation allows the reflective function and protective function to be separated, preventing dust adsorption while maintaining reflection efficiency.
Solution Approach 2:
The second optical element acts as an intermediary protective layer between the reflective surface and the ambient environment. It bonds to the reflective surface without directly exposing it to dust and gas, thereby preventing charge adsorption while allowing the laser beam to pass through and be reflected effectively.
2Ease of manufacture
If the optical element is exposed to ambient air, then the structure remains simple and easy to manufacture, but dust or gas is adsorbed by the reflective surface causing quality degradation
Solution Approach 1:
The system is segmented into two optical elements where the second element specifically protects the reflective surface from harmful environmental factors. This segmentation adds minimal manufacturing complexity while effectively preventing dust and gas adsorption on the reflective film.
Solution Approach 2:
The second optical element functions as a thin protective film or shell that covers the reflective surface. This thin protective layer prevents direct contact between the reflective film and ambient dust/gas while maintaining optical transparency and not significantly increasing manufacturing difficulty.
3Power
If the reflective surface is coated with reflective film, then the laser beam reflection capability is enhanced, but charge generation leads to frequent replacement which is troublesome and uneconomic
Solution Approach 1:
By segmenting the optical system into two elements, the reflective film remains on the first element for optimal reflection capability, while the second element protects it from charge generation issues. This extends the operational lifetime and reduces replacement frequency without compromising reflection power.
Solution Approach 2:
The second optical element serves as a mediator that protects the reflective surface from environmental factors that cause charge generation and dust adsorption. This intermediary protection reduces maintenance requirements and replacement frequency while preserving the high reflection capability of the coated surface.
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 solution effectively shields the reflective surface from ambient air, reducing beam loss and quality degradation, and minimizing the need for frequent replacements of optical elements.
Implementation Method 1
either one optical element of the first optical element and the second optical element has a reflective surface
Implementation Method 2
since a charge is generated at the surface of a reflective surface coated with the reflective film and adsorbs dust or gas in the surroundings
Data Source
AI summary
An optical element assembly includes a first optical element and a second optical element. A reflective surface is formed in the first optical element, the second optical element is bonded to the reflective surface of the first optical element, and the reflective surface is shielded from ambient air.