Reflex Sight Photo Detector Shoulder Placement
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Solution Overview
Problem
Conventional reflex sights face inaccuracies in detecting ambient light conditions due to suboptimal placement of photoelectric sensors, leading to inappropriate reticle brightness, especially in scenarios where light conditions differ between the target and the firearm.
Innovation Solution
The reflex sight incorporates a front-facing photo detector positioned in the shoulder of the upwardly extending optical element housing, allowing clear line-of-sight to the target and accurate detection of ambient light, enabling precise control of reticle brightness based on target conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the photo detector is positioned in the shoulder of the housing with clear line-of-sight to the target, then the ambient light detection accuracy is improved, but the device complexity increases due to additional structural components
Solution Approach 1:
The housing is divided into distinct segments including the main body, upwardly extending posts, and a cross member that forms the shoulder. This segmentation allows the photo detector to be positioned in the shoulder area with unobstructed line-of-sight to the target, improving ambient light detection accuracy while maintaining a modular structure that manages complexity through functional division.
Solution Approach 2:
The photo detector is positioned in the shoulder formed by the intersection of the cross member and upwardly extending post, utilizing the three-dimensional space created by this structural arrangement. This spatial configuration elevates the photo detector to a position where it can detect ambient light from the target direction without obstruction, transforming the detection geometry to achieve superior measurement precision.
2Measurement precision
If the photo detector is positioned to face the target directly, then the reticle brightness control accuracy is improved, but the ease of operation decreases due to alignment requirements
Solution Approach 1:
The housing structure is pre-configured with the shoulder position that inherently provides the photo detector with the correct orientation and line-of-sight to the target. This preliminary structural arrangement eliminates the need for complex alignment procedures during operation, as the geometry of the shoulder (formed by the cross member and upwardly extending post) automatically positions the photo detector optimally when components are assembled.
Solution Approach 2:
The shoulder structure acts as an intermediary element that mediates between the photo detector and the target. By positioning the photo detector in this intermediate shoulder area, the structure facilitates automatic alignment and ensures the detector faces the target correctly without requiring precise manual adjustment, thus improving ease of operation while maintaining measurement precision.
3Measurement precision
If the housing structure includes upwardly extending posts and a cross member forming a shoulder, then the photo detector positioning accuracy is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The housing is segmented into separate manufacturable components (main body, posts, cross member) that can be produced independently with standard tolerances. The shoulder position, formed by the intersection of these segments, provides a natural reference feature that ensures accurate photo detector positioning when components are assembled, reducing the need for extremely tight tolerances on individual parts while maintaining high positioning accuracy.
Solution Approach 2:
The shoulder structure serves as a self-aligning feature that automatically positions the photo detector accurately through its geometric configuration. The intersection of the cross member and upwardly extending post creates a unique spatial reference that guides the photo detector into the correct position during assembly, eliminating the need for complex external alignment procedures or ultra-precise manufacturing tolerances.
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 ensures accurate detection of ambient light at the target, providing appropriate reticle brightness and enhancing aiming accuracy by avoiding obstructions from the firearm or backup sights, thus improving aiming precision in varying light conditions.
Implementation Method 1
The photo detector is positioned in the housing and configured to detect ambient light at a target object
Data Source
Figure 1
Figure 2~3A
Figure 3B~4
AI summary
An optical sight includes a housing, an optical element, and a photo detector. The housing has a main body, a pair of upwardly extending posts, and a cross member extending between the pair of upwardly extending post. The optical element is supported by the housing and positioned between the pair of upwardly extending posts and between the main body and the cross member. The photo detector is positioned in the housing and configured to detect ambient light at a target object. A first post of the pair of upwardly extending posts and the cross member are joined at a shoulder of the housing. The photo detector is formed in the shoulder of the housing.