Rotating Mirror Light-Receiving Optical System
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Solution Overview
Problem
Existing light-receiving optical systems that irradiate surrounding objects with a light beam and receive the reflected beam to collect information are bulky and complex due to the need for a rotating light-receiving element, which complicates the apparatus configuration.
Innovation Solution
A light-receiving optical system featuring a rotating mirror with a reflection plane at an angle to the rotation axis, an imaging optical system with a multifocal Fresnel lens, and light-receiving elements, where the imaging optical system converges light rays onto specific sections of the multifocal Fresnel lens based on their angle with the optical axis, allowing light to be directed to corresponding light-receiving elements independently of the rotating mirror's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light-receiving element is installed on the rotating portion, then the light-receiving optical system can receive reflected light beams from surrounding objects, but the rotating portion must be upsized and the whole apparatus becomes bulky
Solution Approach 1:
Instead of rotating the light-receiving element to track reflected light, the patent inverts the approach by rotating the mirror to redirect light to a stationary light-receiving element. This inversion eliminates the need for a large rotating portion while maintaining the light-receiving function.
Solution Approach 2:
The patent introduces a rotating mirror as an intermediary component between the light source and the light-receiving element. This mediator redirects the reflected light beams to the stationary light-receiving element, eliminating the need for the light-receiving element itself to rotate and reducing the apparatus size.
2Reliability
If the light-receiving element is installed on the rotating portion, then the apparatus can collect information on surrounding objects, but the configuration becomes complicated with additional signal transmission devices
Solution Approach 1:
The rotating mirror serves as an intermediary that simplifies the system configuration by eliminating the need for complex signal transmission devices. By redirecting light to a stationary light-receiving element, the patent removes the complexity associated with transmitting signals from a rotating to a stationary component.
Solution Approach 2:
The patent extracts the light-receiving element from the rotating portion and places it in a stationary position. This extraction eliminates the need for complex signal transmission mechanisms between rotating and stationary components, simplifying the overall configuration.
3Measurement precision
If the light-receiving element rotates to track light beams, then the apparatus can maintain accurate light reception, but the apparatus size increases due to the upsized rotating portion
Solution Approach 1:
The patent inverts the traditional approach by keeping the light-receiving element stationary and rotating the mirror instead. This inversion maintains light reception accuracy through the rotating mirror's ability to redirect light beams while avoiding the need for a large rotating portion containing the light-receiving element.
Solution Approach 2:
The patent replaces the mechanical rotation of the light-receiving element with the rotation of a lightweight mirror. This substitution maintains optical precision while significantly reducing the size and mass of the rotating portion, as the mirror requires minimal structural support compared to a light-receiving element assembly.
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 enables a compact and simplified apparatus that collects information from surrounding objects without requiring the light-receiving elements to rotate, thus reducing the overall size and complexity of the system.
Implementation Method 1
an imaging optical system having an optical axis that coincides with the rotation axis... rays of light that enter the rotating mirror at an angle in a range of angle with the optical axis are converged onto one of the sections of the multifocal Fresnel lens depending on an angle of the rays with the optical axis
Implementation Method 2
the multifocal Fresnel lens is configured such that the rays converged onto the one of the sections reach one of the light-receiving elements, which corresponds to the one of the sections so that a light-receiving element that the rays of light reach is determined depending on the angle of the rays with the optical axis
Implementation Method 3
a rotating mirror that is configured to rotate around a rotation axis and is provided with a reflection plane arranged at an angle with the rotation axis
Data Source
AI summary
A light-receiving optical system includes a rotating mirror configured to rotate around a rotation axis and having a reflection plane arranged at an angle with the rotation axis; an imaging optical system having an optical axis that coincides with the rotation axis; a multifocal Fresnel lens having sections formed concentrically around the optical axis; and light-receiving elements, wherein the imaging optical system is configured such that rays of light that enter the rotating mirror are converged onto one of the sections depending on an angle of the rays with the optical axis, and the multifocal Fresnel lens is configured such that the rays reach one of the light-receiving elements, which corresponds to the one of the sections so that a light-receiving element that the rays reach is determined depending on the angle of the rays with the optical axis independently of a rotational position of the rotating mirror.