Imagine you need to have an almost exact copy of an object. Now imagine that you can just pull your smartphone out of your pocket, take a snapshot with its integrated 3-D imager, send it to your 3-D printer, and within minutes you have reproduced a replica accurate to within microns of the original object.
This feat may soon be possible because of a new, tiny high-resolution 3-D imager developed at Caltech.
Any time you want to make an exact copy of an object with a 3-D printer, the first step is to produce a high-resolution scan of the object with a 3-D camera that measures its height, width, and depth. Such 3-D imaging has been around for decades, but the most sensitive systems generally are too large and expensive to be used in consumer applications.
A cheap, compact yet highly accurate new device known as a nanophotonic coherent imager (NCI) promises to change that. Using an inexpensive silicon chip less than a millimeter square in size, the NCI provides the highest depth-measurement accuracy of any such nanophotonic 3-D imaging device.
The work, done in the laboratory of Ali Hajimiri, the Thomas G. Myers Professor of Electrical Engineering in the Division of Engineering and Applied Science, is described in the February 2015 issue of Optics Express.
In a regular camera, each pixel represents the intensity of the light received from a specific point in the image, which could be near or far from the camera—meaning that the pixels provide no information about the relative distance of the object from the camera. In contrast, each pixel in an image created by the Caltech team’s NCI provides both the distance and intensity information. “Each pixel on the chip is an independent interferometer—an instrument that uses the interference of light waves to make precise measurements—which detects the phase and frequency of the signal in addition to the intensity,” says Hajimiri.
The new chip utilizes an established detection and ranging technology called LIDAR, in which a target object is illuminated with scanning laser beams. The light that reflects off of the object is then analyzed based on the wavelength of the laser light used, and the LIDAR can gather information about the object’s size and its distance from the laser to create an image of its surroundings. “By having an array of tiny LIDARs on our coherent imager, we can simultaneously image different parts of an object or a scene without the need for any mechanical movements within the imager,” Hajimiri says.
The Latest on: Nanophotonic coherent imager
[google_news title=”” keyword=”Nanophotonic coherent imager” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Nanophotonic coherent imager
- Imaging of the Wrist and Handon February 23, 2024 at 4:00 pm
MRI is a form of nonionizing radiation that allows imaging of bone marrow, soft tissues (including cartilage, ligaments, and tendons) and neurovascular structures in three planes (Fig. 18).
- Google halts AI tool’s ability to produce images of people after backlashon February 22, 2024 at 11:28 am
The embarrassing blunder shows how AI tools still struggle with the concept of race. OpenAI’s Dall-E image generator, for example, has taken heat for perpetuating harmful racial and ethnic ...
- Enhanced 3D chemical imaging with phase-modulationon February 22, 2024 at 9:44 am
Understanding complex biological and biomedical systems is greatly aided by 3D imaging, which provides much more detailed information than traditional two-dimensional methods. However, live cell and ...
- Google pauses Gemini AI image generator after it created inaccurate historical pictureson February 22, 2024 at 3:42 am
Google on Thursday said it is pausing its Gemini artificial intelligence image generation feature after saying it offers "inaccuracies" in historical pictures. Users on social media had been ...
- Imaging Science Bachelor of Science Degreeon February 21, 2024 at 4:00 pm
RIT’s imaging science degree combines physics, math, computer science, and engineering to develop cutting-edge imaging systems for satellites, drones, AR/VR, and more. Freshman Imaging Project: ...
- Monotype Imaging Holdingson February 15, 2024 at 4:00 pm
Monotype Imaging Holdings, Inc. provides technology with design to help the world communicate. It also provides printer drivers, page description language interpreters, printer user interface ...
- 'Heaven' image has circulated for years, and it's not from NASA | Fact checkon February 9, 2024 at 7:16 am
The video shows an image of what appears to be a blurry city set against a backdrop of stars. At one point when the image is being shown, text above it reads: "IMAGE CAUGHT BY NASA IN THE 90s ...
- Medical Imaging Newson February 7, 2024 at 4:00 pm
Feb. 9, 2024 — An innovative breast imaging technique provides high sensitivity for detecting cancer while significantly reducing the likelihood of false positive results. Researchers said the ...
- Space pictures! See our image of the dayon February 1, 2024 at 4:00 pm
This image was shot by NASA's Perseverance rover, as the Martian explorer moves out of range of Ingenuity. Friday, February 23, 2024: The sun peers out from behind the curve of the Earth ...
- Visage Imagingon February 1, 2024 at 4:00 pm
Diagnostic imaging and multimedia company Visage Imaging announced the launch of Visage Ease VP, an immersive imaging platform that can be used on Apple's augmented reality headset, Apple Vision Pro.
via Bing News