Sighting Telescope Reticle and Target Mark Placement
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Solution Overview
Problem
Conventional sighting telescopes face challenges in maintaining shooting reliability and distance measurement, particularly under varying light conditions and magnification, as existing designs either mask the target object or fail to provide accurate distance determination due to the placement of reticles and target marks in image planes.
Innovation Solution
A sighting telescope design featuring a beam splitter slanted relative to the optic axis with a projection element and light source, where a reticle is placed in the first image plane for constant magnification and distance measurement, and a target mark in the second image plane remains constant across magnification changes, ensuring visibility and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sighting accessory is placed in the first image plane, then distance measurement is enabled through constant magnification relation, but the accessory masks a large portion of the target object at large magnifications
Solution Approach 1:
The sighting telescope is divided into two independent image planes: the first image plane contains the reticle for distance measurement, while the second image plane contains the target mark for sight picture. This segmentation allows each component to perform its function without interfering with the other, solving the contradiction between distance measurement capability and target visibility.
2Ease of operation
If the target mark is placed in the second image plane, then the mark remains constant size across magnification changes, but the mark is fully visible even when illumination is shut off, masking the target image
Solution Approach 1:
The target mark in the second image plane is made switchable through a illumination element that can be turned on or off based on lighting conditions. This dynamic control allows the mark to be visible when needed for sight picture while being invisible when it would mask the target image, resolving the contradiction between sighting accuracy and target visibility.
3Measurement precision
If the reticle is placed in the first image plane, then constant magnification relation enables distance measurement, but the reticle becomes hard to discern at large magnifications under poor light conditions
Solution Approach 1:
The reticle in the first image plane is equipped with a dedicated illumination element that provides localized lighting to enhance its visibility. This local illumination ensures the reticle remains discernible even at large magnifications under poor ambient light conditions, while maintaining its distance measurement 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 design enhances shooting reliability by maintaining a clear target image and enabling accurate distance measurement, even at large magnifications and in poor light conditions, by using a reticle in the first image plane and a target mark in the second image plane, improving the likelihood of hitting the target without masking it.
Implementation Method 1
a beam splitter, which is configured in the path of the beam between an objective and ocular and is slanted relative to an optic axis
Implementation Method 2
a beam splitter, which is configured in the path of the beam between an objective and ocular and is slanted relative to an optic axis
Implementation Method 3
the projection element being fitted with a light source
Data Source
AI summary
A sighting telescope included a beam splitter which is slanted relative to an optic axis and is configured between an objective and an ocular, further a projection element to generate onto the beam splitter a target mark visible from the ocular, the projection element being fitted with a light source, further two image planes between the objective and the ocular, of which a first image plane is nearer the objective and a second image plane is nearer the ocular, and a reversal system configured between the image planes, a reticle being situated in the first image plane and the target mark in the second image plane.