Projection Apparatus Diffractive Optical Element Mounting Structure
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Solution Overview
Problem
Existing projection apparatuses face challenges with the alignment and secure mounting of diffractive optical elements, leading to misalignment, loss, and disruption of the projection function, particularly due to their small size and fragile nature.
Innovation Solution
Incorporating a housing with a light transmission groove and a limit wall around it, where the diffractive optical element is mounted within the limit groove, preventing excessive horizontal shift and ensuring proper alignment and secure mounting of the diffractive optical element during assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the diffractive optical element is mounted directly in the projection groove, then the structure is simple, but the element is easily misaligned or dropped due to its small size, increasing time cost and causing loss of projection function
Solution Approach 1:
The mounting structure is segmented into multiple functional components: the projection groove for positioning, the limit wall for constraining horizontal movement, and the limit groove for securing the element. This segmentation allows each component to perform its specific function, preventing misalignment and loss while maintaining reasonable structural complexity
Solution Approach 2:
The limit wall acts as an intermediary element between the projection groove and the diffractive optical element. It provides an intermediate constraint mechanism that prevents the small element from moving horizontally out of the groove, thereby ensuring reliable mounting without requiring the element to be directly fixed to the groove walls
2Volume of moving object
If the diffractive optical element is made smaller to reduce size, then the projection apparatus is more compact, but the element becomes easier to lose and harder to align, increasing maintenance time
Solution Approach 1:
The solution adds a horizontal constraint dimension by introducing the limit wall that extends horizontally across the projection groove. This creates a new dimensional constraint that prevents the small diffractive optical element from moving horizontally, thereby compensating for its small size and reducing alignment difficulty during maintenance
Solution Approach 2:
The limit wall and limit groove are pre-formed as integral parts of the housing structure before the diffractive optical element is installed. This preliminary preparation creates a ready-made constraint system that guides the element into proper positioning during assembly and prevents loss during maintenance, reducing the time required for alignment and repair operations
3Ease of operation
If the projection groove is made wider to facilitate element insertion, then mounting is easier, but the element can shift horizontally and become misaligned
Solution Approach 1:
The groove structure is segmented into two functional zones: the projection groove itself, which is wide enough to facilitate easy insertion of the diffractive optical element, and the limit groove bordered by the limit wall, which provides horizontal constraints. This segmentation allows the groove to serve dual purposes: easy mounting and precise alignment
Solution Approach 2:
Different parts of the groove structure have different properties: the projection groove has a wide opening for ease of insertion, while the limit groove created by the limit wall provides localized horizontal constraints. This local differentiation of structural properties allows the system to simultaneously achieve easy mounting and precise alignment
Data Source
AI summary
The present invention discloses a projection apparatus, including: a housing including a light transmission groove and a limit wall arranged around the light transmission groove, where a width of a limit groove defined by the limit wall is greater than a width of the light transmission groove; and a first light source assembly being received in the housing and including a first light source body and a diffractive optical element located above the first light source body, where the diffractive optical element is mounted in the limit groove, and the limit wall limits excessive shift of the diffractive optical element along a horizontal direction, which facilitates mounting of the diffractive optical element.