17838217. Coherent sensing system using a DOE simplified abstract (APPLE INC.)
Contents
Coherent sensing system using a DOE
Organization Name
Inventor(s)
Coherent sensing system using a DOE - A simplified explanation of the abstract
This abstract first appeared for US patent application 17838217 titled 'Coherent sensing system using a DOE
Simplified Explanation
The patent application describes a range sensing apparatus that uses coherent optical radiation to measure distances. Here are the key points:
- The apparatus includes a radiation source that emits a beam of coherent optical radiation.
- An array of optical detectors is used to capture the optical radiation reflected from a target.
- A beamsplitter directs the beam towards the target and also reflects the optical radiation from the target towards the array of optical detectors.
- A diffractive optical element (DOE) is used to split the beam into multiple orders, including a zero order, which propagate towards the target at different angles.
- A reflector intercepts and reflects at least a part of the zero order back towards the beamsplitter, generating a local beam.
- Objective optics are used to image the target onto the array of optical detectors while spreading the local beam across the array.
- Processing circuitry extracts a beat signal from the electrical signals output by the optical detectors, which results from the interference between the optical radiation reflected from the target and the local beam.
Potential applications of this technology:
- Range sensing and distance measurement in various fields such as robotics, autonomous vehicles, and industrial automation.
- 3D scanning and mapping for applications like virtual reality, augmented reality, and computer vision.
- Object detection and tracking for security systems, surveillance, and gesture recognition.
Problems solved by this technology:
- Provides a non-contact method for accurately measuring distances.
- Enables range sensing over long distances with high precision.
- Allows for real-time measurements and fast data processing.
Benefits of this technology:
- High accuracy and precision in distance measurements.
- Non-contact measurement eliminates the need for physical contact with the target.
- Fast and real-time measurements enable quick decision-making and response.
- Versatile applications in various industries and fields.
Original Abstract Submitted
Range sensing apparatus includes a radiation source, which emits a beam of coherent optical radiation, and an array of optical detectors. A beamsplitter directs the beam toward a target while directing the optical radiation reflected from the target toward the array of optical detectors. A DOE diffracts the beam into multiple orders, including a zero order, propagating toward the target at different, respective angles. A reflector intercepts and reflects at least a part of the zero order toward the beamsplitter, thereby generating a local beam, which is reflected by the beamsplitter toward the array of optical detectors. Objective optics image the target onto the array of optical detectors while spreading the local beam across the array. Processing circuitry extracts a beat signal from electrical signals output by the optical detectors in response to an optical interference between the optical radiation reflected from the target and the local beam.
