OCT (optical coherence tomography) is a technology that uses the coherence of light to image fine structures inside samples. It offers several advantages, including high speed, high resolution, non-invasiveness, and real-time observation. OCT is mainly used for non-invasive inspections in medical and industrial settings.
OCT Inspection system is a technology that uses the coherence of light to measure distance in the direction that light travels. Near-infrared light is shone on the sample, and the light scattered and reflected back by the sample is combined with reference light passing through a fixed light path inside the OCT device.
By detecting the light interference signal generated in this manner, a one-dimensional signal in the depth direction is obtained. It is possible to obtain tomographic images by continuously scanning the position of light incidence on the sample.
Light from a broadband wavelength light source is shone on the sample, the interference light spectrally dispersed, then detected by a linear image sensor. An image in the depth direction of the sample is acquired by Fourier transforming the obtained wavelength information.
The wavelength-swept light source sweeps the wavelength temporally and shines its output light on the sample, and the generated interference light is detected with a differential detector. An image in the depth direction of the sample is acquired by Fourier transforming the obtained wavelength information.
The Global OCT inspection system market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
New targets for OCT in inspection and metrology Optical coherence tomography (OCT) is moving beyond the biomedical realm and offers advantages on the production line.
Optical coherence tomography (OCT) is a 3D biomedical imaging technique with micron-scale resolution and millimeter penetration depth. Its greatest application is in ophthalmology, where it is used to reveal the layered structure of the retina.
It is also used to image other biological tissues such as skin, epithelium, and vasculature. But as the technique has advanced and instrumentation becomes more widely available, a range of new targets for OCT are emerging.
From the start, the developers of OCT hypothesized that the optical technique could aid in manufacturing processes for glass/polymer composites.1 The technique seemed like an opportunity to avoid wasting product for quality inspection. Nondestructive inspection was in its infancy and OCT hoped to join the ranks of production-line tools.
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