Telescope Baffle with Corner Reflectors to Reduce Background Flux
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional telescope designs face issues with packaging and stability due to cantilevered baffles, increased length and weight, and unwanted background flux from internal structures visible to the detector, which affect the signal-to-noise ratio and detection range.
Innovation Solution
The integration of corner reflectors on interior facing surfaces of the baffle and mirror supports within the telescope housing, allowing the detector to view itself instead of these structures, and an integrated baffle that functions as both a radiation blocker and mirror support, shaped to minimize obscuration and improve optical throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a baffle is cantilevered off the entrance aperture end of the telescope, then off-axis radiation can be blocked, but the telescope length and weight increase
Solution Approach 1:
The baffle is integrated with the mirror support structure, combining two previously separate components (baffle and mirror support) into a single unified structure. This eliminates the need for a separate cantilevered baffle, reducing telescope length while maintaining off-axis radiation blocking capability
Solution Approach 2:
The integrated baffle structure serves multiple functions simultaneously: it blocks off-axis radiation and provides structural support for the mirror. This multi-functionality reduces the number of separate components needed, thereby reducing overall telescope length and weight
2Object-affected harmful factors
If a cantilevered baffle is used to block off-axis radiation, then radiation blocking is improved, but packaging and stability deteriorate
Solution Approach 1:
By merging the baffle with the mirror support structure, the design eliminates the cantilevered configuration that caused packaging and stability issues. The integrated structure is supported at its base by the mirror support, providing inherent structural stability while maintaining radiation blocking functionality
3Volume of moving object
If internal structures are visible to the detector, then the telescope can be compact, but background noise increases
Solution Approach 1:
The interior facing surfaces of the integrated baffle are selectively configured with corner reflectors on the portions visible to the detector. This local modification of surface properties redirects radiation from these specific areas without affecting other parts of the telescope, reducing background flux while maintaining compact design
Solution Approach 2:
The corner reflectors, which could potentially cause unwanted reflections, are instead used to redirect radiation from internal structures back toward the aperture or away from the detector. This converts what would be a harmful effect (visible internal structures) into a beneficial one (reduced background flux by redirecting radiation away from sensitive areas
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 reduces internal and external off-axis radiation, lowers background noise, and enhances the signal-to-noise ratio, thereby increasing the detection range and optical throughput without significantly increasing the length of the telescope assembly.
Implementation Method 1
interior facing surfaces of the baffle in the FOV are configured with corner reflectors
Implementation Method 2
corner reflectors are configured as corner cubes, each having three mutually perpendicular faces
Implementation Method 3
a mirror within the housing for reflecting radiation toward the detector
Implementation Method 4
the integrated baffle includes a plurality of channels which selectively pass on-axis radiation, but eliminate off-axis radiation (e.g., via reflection and/or absorption)
Data Source
AI summary
A telescope design is disclosed that has at least some of its interior facing surfaces configured with corner reflectors, so that a detector operatively coupled to the telescope views itself, instead of those surfaces. The corner reflectors may be on, for example, interior facing surfaces of a conventional baffle appended to the telescope and/or mirror supports or other structures inside the telescope housing that are within the detector's FOV. Likewise, the corner reflectors may be on interior facing surfaces of a baffle that is integrated into the telescope housing. In some such cases, the integrated baffle can be configured as both a baffle and a mirror support. The integrated baffle can be shaped to the F-cone between mirrors of a given telescope design, and/or configured to minimize or otherwise reduce the total obscuration of the baffle to improve the optical throughput.