OT- LUNA Blog-Luna Innovations Provides Comprehensive Solutions for OCT Systems

https://lunainc.com/luna-innovations-comprehensive-solutions-oct-systems/

Optical Coherence Tomography (OCT) image resolution, which can be 100 times better than conventional ultrasound, has profound implications for the diagnosis of internal problems in biological tissues as well as inorganic samples. OCT has become increasingly popular for medical applications such as non-invasive opthalmological imaging, endoscopic gastrointestinal tract imaging and diagnostics for coronary intervention.

Fiber-based OCT systems require precise polarization management, accurate delay control, fast wavelength tuning and complete optical system integration capabilities. Optical path matching is mandatory, and high-performance optical delay lines are required.

Instead of addressing the test, measurement and control challenges of OCT systems with different products from different companies, Luna’s customers have access to a complete suite of products for the complete characterization of passive components along with the interferometer subassembly. 

Luna Innovations offers a wide range of solutions for OCT systems designers and component suppliers that include:

• Products for building OCT systems – OEM components and custom subassemblies
• Customized products or subsystems for particular applications
• Dynamic polarization control for tracking real-time polarization changes
• More sophisticated polarization control and analysis devices for Polarization-Sensitive OCT (PS-OCT) Systems
• High spatial resolution reflectometers, which can help scan the OCT interferometer for high reflection peaks and high losses
• Swept lasers, with demonstrated reliability, enable long-term, worry-free operation of OCT systems

Learn more about Luna’s OCT Solutions. Download our Catalog Now!

Abstract-Quantifying pharmaceutical film coating with optical coherence tomography and terahertz pulsed imaging: an evaluation

Hungyen Lin,Yue Dong, Yaochun Shen, Axel J. Zeitler,
https://www.repository.cam.ac.uk/handle/1810/248408?show=full

Spectral domain optical coherence tomography (SD-OCT) has recently attracted a lot of interest in the pharmaceutical industry as a fast and non-destructive modality for quantification of thin film coatings that cannot easily be resolved with other techniques. Due to the relative infancy of this technique, much of the research to date has focused on developing the in-line measurement technique for assessing film coating thickness. To better assess OCT for pharmaceutical coating quantification, this paper evaluates tablets with a range of film coating thickness measured using OCT and terahertz pulsed imaging (TPI) in an off-line setting. In order to facilitate automated coating quantification for film coating thickness in the range of 30 to 200 μm, an algorithm that uses wavelet denoising and a tailored peak finding method is proposed to analysis each of the acquired A-scan. Results obtained from running the algorithm reveal an increasing disparity between the TPI and OCT measured intra-tablet variability when film coating thickness exceeds 100 μm. The finding further confirms that OCT is a suitable modality for characterising pharmaceutical dosage forms with thin film coatings while TPI is well suited for thick coatings.

Abstract- Terahertz imaging based on optical coherence tomography

Tadao Nagatsuma, Hiroki Nishii, and Toshiyuki Ikeo  »View Author Affiliations

Photonics Research, Vol. 2, Issue 4, pp. B64-B69 (2014)
http://dx.doi.org/10.1364/PRJ.2.000B64

http://www.opticsinfobase.org/prj/abstract.cfm?uri=prj-2-4-B64

Three-dimensional (3D) terahertz (THz) imaging or THz tomography has recently proven to be useful for nondestructive testing of industrial materials and structures. In place of previous imaging techniques such as THz pulsed/continuous-wave radar and THz computed tomography, we propose a THz optical coherence tomography using photonics- and electronics-based THz sources, and demonstrate thickness measurement and tomographic imaging in frequency regions from 400 to 800 GHz.

© 2014 Chinese Laser Press