Mirror Apparatus Inclined Window Member for Light Scanning
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Solution Overview
Problem
Existing mirror apparatuses face challenges in accurately disposing frame members with respect to the base portion and securing a wide scanning range due to interference from frame-shaped members, which can block light and limit the range of light scanning.
Innovation Solution
The mirror apparatus incorporates a base portion with a recess, a magnet unit, a mirror unit with a movable mirror surface, and a frame member with inclined surfaces and projection portions to improve alignment accuracy and expand the scanning range by directing light reflection away from noise sources and allowing precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a frame-shaped member is disposed on the base portion to support a glass plate, then the mirror apparatus structure is formed, but the frame-shaped member blocks light and limits the scanning range
Solution Approach 1:
The patent extracts the harmful function of the frame member by introducing a window member that removes the light-blocking portion of the frame. The window member is disposed at the light incident surface to cover the frame member, allowing light to pass through the window member and reach the mirror without being blocked by the frame structure.
Solution Approach 2:
The window member acts as an intermediary element between the light source and the mirror. It is positioned at the light incident surface and inclined relative to the mirror surface, serving as a mediator that allows light to pass through while maintaining the structural support function of the frame.
2Manufacturing precision
If the frame-shaped member is accurately disposed on the base portion, then light blocking is reduced, but the positioning accuracy is difficult to achieve
Solution Approach 1:
The frame member is designed with a projection portion that automatically aligns with the recess on the base portion. When the frame member is placed on the base portion, the projection portion fits into the recess, enabling self-positioning and self-alignment without requiring complex external positioning mechanisms or high-precision manual adjustment.
Solution Approach 2:
The projection portion on the frame member and the corresponding recess on the base portion create an asymmetric geometric relationship that enables unique positioning. This asymmetric design ensures that the frame member can only be disposed in the correct orientation and position, achieving accurate alignment through geometric constraints rather than complex positioning systems.
3Ease of manufacture
If the window member is disposed parallel to the mirror surface, then light transmission is simplified, but reflected light becomes noise light and reduces scanning effectiveness
Solution Approach 1:
The window member is disposed at an inclination relative to the mirror surface, creating an asymmetric angular relationship. This inclination causes light reflected from the window member to travel in a different direction than light reflected from the mirror surface, preventing the reflected light from becoming noise light that would interfere with the scanning function.
Solution Approach 2:
The inclination of the window member converts the potentially harmful effect of light reflection into a beneficial outcome by directing reflected light away from the optical path. The reflection that would otherwise create noise light is redirected to a different direction, eliminating the harmful effect while maintaining the window member's light transmission function.
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 configuration enhances the accuracy of frame member placement and expands the scanning range by minimizing light interference and misalignment, ensuring precise and wide-ranging light scanning capabilities.
Implementation Method 1
a coil which is provided in the movable portion and on which a magnetic field generated by the magnet unit acts
Implementation Method 2
the window member is disposed on the top surface of the first wall portion and the top surface of the second wall portion, and is inclined with respect to the mirror surface. Accordingly, a direction in which light reflected by the window member travels can be made different from a direction in which light reflected by the mirror surface travels
Data Source
AI summary
A mirror apparatus includes a base portion formed with a recess that is open to a disposition surface; a magnet unit disposed in the recess; a mirror unit having a mirror surface; a frame member disposed on the disposition surface at a second surface of the frame member; and a window member. The window member is inclined with respect to the mirror surface. A projection portion is formed on the second surface of the frame member. The projection portion is disposed between the magnet unit and an opening edge of the recess when viewed in a Z direction. A portion of a first surface of the frame member, which overlaps the projection portion in the Z direction, is an inclined surface inclined with respect to the mirror surface, and the window member is disposed on the inclined surface.