V-Shaped Interferometer Prism Asymmetry
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Solution Overview
Problem
Interferometric optical devices face challenges in efficiently measuring the spectrum of radiation emitted by objects due to limitations in existing optical set-ups, particularly in varying the optical path difference as a function of the angle of incidence, which affects the accuracy of spectral analysis.
Innovation Solution
An interferometric optical device comprising two geometrically similar prisms with a beamsplitter configuration, where the prisms are offset and of different sizes, allowing incoming light to propagate through distinct optical paths that vary in length with the angle of incidence, enabling precise spectral analysis by generating coherent light beams for interferogram formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional interferometer configurations are used, then the basic spectral measurement function is achieved, but the optical path difference cannot be effectively varied as a function of angle of incidence, limiting measurement precision
Solution Approach 1:
The patent employs asymmetric prism configuration where two prisms of different sizes are used instead of identical prisms. The first prism has a different aperture than the second prism, creating an asymmetric optical system that enables the optical path difference to vary as a function of angle of incidence. This asymmetry is fundamental to achieving both improved measurement precision and the required adaptability.
Solution Approach 2:
The patent introduces angular dimension control by varying the angle of incidence of light beams passing through the prisms. By making the optical path difference a function of angle of incidence rather than a fixed value, the system adds a dimensional variable that enables more precise spectral measurements while maintaining adaptability.
2Measurement precision
If prisms of different sizes are used to vary optical path difference, then spectral measurement precision is improved, but the device complexity increases due to the asymmetric configuration
Solution Approach 1:
The patent applies local quality by giving different properties to different parts of the optical system. Specifically, the first and second prisms have different sizes and apertures tailored to their specific functional requirements in the optical path. This localized differentiation enables precise control of optical path difference without requiring complete redesign of the entire system.
Solution Approach 2:
The optical system is segmented into distinct functional components - the first prism, the second prism, and the beamsplitter - each with specific dimensions and properties. This segmentation allows independent optimization of each component while maintaining overall system functionality, managing complexity through modular design.
3Manufacturing precision
If the interface region length is increased to improve optical path difference control, then spectral resolution is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent incorporates preliminary alignment features in the prism design, such as precisely defined interface regions and matching surfaces, that facilitate accurate alignment during assembly. By pre-designing these alignment mechanisms, the system achieves high spectral resolution without requiring excessive manufacturing precision in all components.
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 enhances the accuracy of spectral analysis by varying the optical path difference as a function of the angle of incidence, improving the resolution and sensitivity of spectral measurements, thereby overcoming previous limitations in interferometric optical devices.
Implementation Method 1
light beams that propagate from the source of light to the detector along each of the first and second optical paths are reflected from the beamsplitter configuration and transmitted by the beamsplitter configuration exactly once
Implementation Method 2
an interferometric optical device having a beamsplitter configuration deployed between two geometrically similar prisms
Implementation Method 3
a first prism comprising a light-transmitting material having a plurality of surfaces including at least a first surface associated with a source of light and a second surface oblique to the first surface
Data Source
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AI summary
An optical device includes two prisms and a beamsplitter configuration. A first of the prisms has a first surface associated with a source and a second surface oblique to the first surface. A second of the prisms has a first surface associated with a detector and a second surface oblique to the first surface. The second surface of the first prism overlaps with the second surface of the second prism to define an interface region that partially extends along at least one of the second surfaces. The prisms are optically attached at the interface region, and the beamsplitter configuration overlies the interface region. A beam emitted by the source propagates through the prisms along two optical paths and reaches the detector as two coherent beams. Beams that propagate along the two optical paths are reflected from the beamsplitter configuration and transmitted by the beamsplitter configuration exactly once.