Telescope Prism Inversion System with Projection Optics
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Solution Overview
Problem
Conventional telescopes with reticles in the beam path suffer from image quality impairment due to dust particles causing scattered light and the reticle's constant visibility, which affects measurement accuracy and visibility under unfavorable lighting conditions.
Innovation Solution
A terrestrial telescope design featuring a prism reversal system with projection optics and a beam splitter, where a mask with a reticle pattern is rear-illuminated, allowing for self-illuminating line images and a compact structure, along with a focusing device for parallax and diopter compensation, and a zoom lens system for adjustable magnification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reticle is arranged directly in the beam path, then measurement functionality is enabled, but dust particles on the reticle surface cause scattered light and image quality impairment
Solution Approach 1:
A beam splitter is introduced as an intermediary element to separate the observation beam path from the projection beam path. The reticle is projected through the beam splitter rather than being placed directly in the observation beam path, eliminating dust-related scattered light while maintaining measurement functionality.
Solution Approach 2:
The optical system is segmented into separate observation and projection beam paths. The reticle projection function is separated from the main observation path, allowing independent optimization of each path to avoid the harmful effects of dust accumulation on the reticle surface.
2Adaptability or versatility
If a reticle plate is arranged in the intermediate image plane, then distance measurement is enabled, but the reticle is always visible and reduces contrast under unfavorable lighting conditions
Solution Approach 1:
The reticle visibility is made dynamic through switchable lighting devices that can illuminate the reticle on demand. The reticle is not constantly visible but can be activated when needed for measurement, improving contrast and reducing visual interference during pure observation modes.
Solution Approach 2:
The system provides feedback control through switchable illumination that activates the reticle based on operational needs. The lighting devices can be controlled to illuminate the reticle when measurement is required and turn off when pure observation is needed, adapting to the current operational state.
3Object-affected harmful factors
If projection optics with beam splitter are used to project reticle image, then image quality is improved, but device complexity increases
Solution Approach 1:
The beam splitter serves multiple functions: it separates the observation and projection beam paths, allows the reticle image to be projected into the observation field, and maintains the integrity of both beam paths. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The projection optics and observation optics are merged into a single integrated system using the beam splitter. The reticle projection path and the observation path share common optical elements and the final optical train, reducing overall system complexity despite the added functionality.
4Device complexity
If conventional telescope design is used, then structure is simple, but telescope length is excessive and not compact
Solution Approach 1:
The optical path is folded using prisms to change the spatial arrangement from a linear configuration to a compact folded configuration. The beam splitter and prisms redirect the light path in additional dimensions, allowing the telescope to achieve a compact form factor while maintaining the necessary optical path length.
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 image quality, reduces the telescope's length, and allows for adaptable use between measurement and observation tasks, improving accuracy and usability under varying lighting conditions.
Implementation Method 1
a beam path of the projection optics (21) coupled into the observation beam path through a beam splitter (14)
Implementation Method 2
the light source (23) being arranged for rear illumination of the mask (22)... a line image can be created in which the lines or lines and line networks are self-illuminating
Implementation Method 3
prism reversal system (4)... a first and a second deflection prism (5, 6)... the observation beam path being deflected by the first deflection prism (5) from a first main beam section (16) into a second main beam section (17)
Implementation Method 4
an objective (2)... an image plane (10) of distant objects generated by the lens (2)
Implementation Method 5
an eyepiece (3)... through the eyepiece (3) the lines of the reticle and, superimposed on them, the image of the distant objects generated by the lens can be observed sharply
Data Source
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AI summary
The invention relates to a telescope (1) with an objective (2), an eyepiece (3) and a prism reversing system (4) and with a projection optics (21) having a beam path for imaging an image of a reticle into a focal plane of the eyepiece (3), wherein the beam path of the projection optics (21) is connected to the observation beam path by a beam splitter, and wherein the projection optics (21) comprises a mask (22) and a light source (23) which is arranged for rear illumination of the mask (22).