Dot-Sighting Device Parallax Reduction via Beam Splitter
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Solution Overview
Problem
Conventional dot-sighting devices face challenges in minimizing parallax and maintaining aiming accuracy, especially under vibrations, which affects the alignment of the gun's sight with the front sight, and can expose the user's position to opponents due to larger parallax and reduced reflective mirror size.
Innovation Solution
A dot-sighting device incorporating a beam splitter with an inclined plane that reflects and transmits light components to minimize parallax, using a reflective element and polarizing units to ensure the dot reticle is not visible to opponents, while maintaining a compact design by aligning the optical axis of the reflective mirror with the dot reticle generating unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the optical axis of the reflective mirror is inclined to the optical axis of the barrel, then the dot reticle is not visible from the outside (improving stealth), but the parallax increases (worsening aiming precision)
Solution Approach 1:
A beam splitter is introduced as an intermediary optical element between the dot reticle generating unit and the reflective mirror. The beam splitter separates the optical paths: it reflects light from the dot reticle toward the reflective mirror while transmitting light from the target to the user's eye. This intermediary device allows the reflective mirror's optical axis to be inclined for stealth purposes while the beam splitter corrects the optical path to minimize parallax and maintain aiming accuracy.
2Measurement precision
If the distance between the dot reticle and the reflective mirror is increased to secure allowable parallax region, then the parallax is reduced (improving aiming precision), but the effective diameter of the reflective mirror must be reduced (worsening light gathering capability)
Solution Approach 1:
The beam splitter changes the dimensional relationship between the dot reticle and reflective mirror by introducing a separate optical path. Instead of increasing the linear distance along the optical axis, the beam splitter creates a perpendicular light path that allows the reflective mirror to maintain its effective diameter while still achieving the necessary parallax reduction through the inclined optical axis configuration.
3Measurement precision
If a high-power optical sighting device with telescopic lens is used to improve aiming accuracy, then the line of sight alignment is improved, but the device becomes sensitive to slight vibration (worsening rapid aiming capability)
Solution Approach 1:
The optical power parameter of the sighting device is changed from high-power telescopic lens to no-power or low-power lens. This parameter change reduces the device's sensitivity to vibration while maintaining aiming accuracy through the dot reticle matching method, where the user matches the dot reticle image with the real target rather than relying on precise line of sight alignment through high-power optics.
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 reduces parallax, enhances aiming accuracy, and secures the user's field of vision, preventing exposure of the user's position to opponents while maintaining a lightweight and compact device.
Implementation Method 1
The beam splitter includes a surface that reflects at least a portion of a first light component of the light
Implementation Method 2
transmits at least a portion of a second light component
Implementation Method 3
The reflective element reflects at least a portion of the first light component reflected by the surface of the beam splitter toward the beam splitter
Data Source
AI summary
A dot-sighting device includes a light source, a beam splitter and a reflective element. The light source emits light. The beam splitter includes a surface that reflects at least a portion of a first light component of the light and transmits at least a portion of a second light component. The reflective element reflects at least a portion of the first light component reflected by the surface of the beam splitter toward the beam splitter. The light reflected by the reflective element includes the second light component.