Cylindrical Lens Recess for Thermal-Stable Optical Deflection
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Solution Overview
Problem
Existing sighting devices, such as telescopes, face challenges in maintaining high measurement accuracy and robustness against environmental influences like temperature changes and mechanical shocks due to the need for multiple optical components and adhesives that are susceptible to thermal stresses and humidity, which can lead to inaccuracies and increased complexity.
Innovation Solution
The design incorporates a cylindrical recess in the lens with a corresponding cylindrical fastening section for the optical deflection element, using an adhesive gap to securely attach the deflection means without direct contact, ensuring homogeneous stress distribution and minimizing the impact of environmental factors, thereby maintaining collinearity and angular stability of the laser beam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple optical components and adhesives are used to couple and decouple beams, then beam coupling functionality is achieved, but thermal stresses and humidity affect the adhesives leading to measurement inaccuracies and increased complexity
Solution Approach 1:
The patent combines the beam coupling/decoupling functionality into a single optical component (prism or beam splitter) that integrates both functions. This eliminates the need for multiple separate components and adhesives, thereby removing the source of thermal stress and humidity-related instability while maintaining the required beam manipulation functionality.
Solution Approach 2:
The optical component is designed to perform multiple functions simultaneously - both coupling and decoupling of beams - within a single element. This multi-functionality reduces the overall component count and eliminates adhesive joints that would be susceptible to environmental degradation.
2Ease of manufacture
If multiple optical components are used to achieve beam coupling and decoupling, then beam manipulation functionality is achieved, but the device complexity and number of components increase
Solution Approach 1:
The patent merges the functions of multiple optical components (coupling element and decoupling element) into a single integrated optical component. This consolidation reduces the number of parts in the system while maintaining the full beam manipulation functionality required for the sighting device.
Solution Approach 2:
The single optical component is designed with multi-functionality to perform both beam coupling and beam decoupling operations. This universal design approach eliminates the need for separate specialized components, thereby reducing overall device complexity.
3Ease of manufacture
If adhesives are used to attach optical components, then component assembly is achieved, but thermal expansion and humidity cause stress and misalignment
Solution Approach 1:
By combining multiple components into a single integrated optical element, the patent eliminates adhesive joints entirely. This integration approach maintains ease of manufacture through precision molding or fabrication of the single component while completely removing the source of thermal and humidity-related instability.
Solution Approach 2:
The patent employs a single optical component made from materials with appropriate thermal and humidity stability characteristics. This composite material approach ensures that the component can be manufactured with required precision while inherently resisting environmental degradation that would affect adhesive-bonded assemblies.
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 achieves high measurement accuracy and robustness against environmental influences, reducing the number of components and costs while maintaining optical quality, with improved imaging and reduced crosstalk between transmission and reception channels.
Implementation Method 1
The optical deflection means is attached to the at least one lens via an adhesive located in the adhesive gap
Implementation Method 2
at least one optical deflection means for coupling the transmitted beams into the optical beam path of the targeting device and/or for decoupling the received beams from the optical beam path
Implementation Method 3
an objective unit with at least one lens and an image unit, such as a camera sensor and/or an eyepiece, with an optical beam path being defined between the objective unit and the image unit
Data Source
Figure 1a~1g
Figure 2a~3
Figure 4
AI summary
The invention relates to a sighting device, in particular to a telescopic sight, for a measuring apparatus having angular and in particular distance measurement functionality. The sighting device at least comprises an objective unit - defining an optical axis - having at least one lens, an image unit having a camera sensor and/or an eyepiece for capturing and/or providing an image of a sighted target object, a transmitter for emitting measurement beams as transmitted beams and/or a receiver for capturing measurement beams as received beams, and at least one optical deflection means for coupling the transmitted beams into the optical beam path of the sighting device and/or for coupling the received beams (4) out of the optical beam path. According to the invention, the at least one lens comprises a cylindrical recess around the optical axis, the recess extending in the direction of the optical axis. Furthermore, the deflection means comprises a cylindrical fastening section that extends inside the recess such, and corresponds to the recess with respect to shape and dimension such, that a gluing gap is created between the outer lateral surface of the fastening section and at least a portion of an inner lateral surface of the lens defined by the recess, and the deflection means is fastened to the at least one lens, mediated by an adhesive located in the gluing gap.