Diffractive Light Signal Redirection for Optical Measurement
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Solution Overview
Problem
Existing optical measurement apparatuses face challenges in simplifying light signal redirection into monitoring regions, requiring complex components and adjustments, and struggle to achieve a large field of view with high resolution.
Innovation Solution
The use of diffractive structures in light signal redirection devices allows for easy management and adjustment of light signal direction, reducing the complexity of optical design and enabling high flexibility, thereby simplifying the redirection process and enhancing the field of view and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If complex redirection mirror arrangements are used to redirect light signals into monitoring regions, then the field of view can be covered, but the device complexity and adjustment requirements increase significantly
Solution Approach 1:
The patent replaces complex mechanical redirection mirror arrangements with a diffractive optical element that uses diffraction physics to redirect light signals. This substitution eliminates the need for multiple mirrors and their associated mechanical mounting and adjustment mechanisms, thereby reducing device complexity while maintaining the ability to cover the required field of view.
Solution Approach 2:
The diffractive optical element changes the direction of light signals by varying the diffraction angle based on the wavelength and incidence angle of the light. This parameter-based control allows for precise light redirection without mechanical adjustments, simplifying the overall device structure while achieving comprehensive field of view coverage.
2Area of stationary object
If multiple transmission redirection mirrors are arranged radially to expand field of view, then coverage area increases, but the number of components and assembly complexity increase
Solution Approach 1:
The patent merges the functions of multiple transmission redirection mirrors into a single diffractive optical element. This unified component performs the light redirection function that previously required multiple separate mirrors, thereby reducing the quantity of optical components while maintaining comprehensive monitoring region coverage through diffraction-based angle control.
3Adaptability or versatility
If rotary transmission mirror units are used to redirect light beams, then field of view scanning is achieved, but the system requires maintenance and has limited service life
Solution Approach 1:
The patent replaces rotary transmission mirror units with a stationary diffractive optical element. The beam direction control function is achieved through the diffraction properties of the element rather than mechanical rotation, eliminating moving parts that require maintenance and thereby significantly improving reliability and service life while maintaining adaptability in beam direction control.
4Measurement precision
If large lenses are used to achieve high resolution, then measurement precision improves, but the device size and complexity increase
Solution Approach 1:
The patent uses a diffractive optical element to achieve high resolution without requiring large lenses. The diffraction-based light control mechanism provides precise spatial resolution through the interference patterns created by the diffractive structure, maintaining measurement precision while significantly reducing the physical size of the optical components and overall device.
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 approach results in a long-lasting, maintenance-free light signal redirection system that can capture a large field of view with high resolution, reducing the need for large lenses and improving the reliability and flexibility of the optical measurement apparatus.
Implementation Method 1
at least one redirection region has at least one diffractive structure
Data Source
AI summary
The invention relates to a transmission device (24) for an optical measurement apparatus (12) for capturing objects (18) in a monitoring region (16), to a light signal redirection device (34), to an optical measurement apparatus (12) and to a method for operating a transmission device (24). The transmission device (24) comprises at least one transmitter light source (30) for sending light signals (20) and at least one light signal redirection device (34) for redirecting the light signals (20) into at least one monitoring region (16) of the measurement apparatus (12). The at least one light signal redirection device (34) has at least one redirection region (42a), which can act on the light signals (20) in dependence on an incidence of the light signals (20) so as to change their direction. Furthermore, the transmission device (24) comprises at least one drive device (50) with which an incidence of the light signals (20) on the at least one redirection region (42a) can be set. At least one redirection region (42a) has at least one diffractive structure.