We report a newly developed high speed 1050nm spectral domain optical coherence tomography (SD-OCT) system for imaging posterior segment of human eye. The system is capable of an axial resolution at ~10 µm in air, an imaging depth of 6.1 mm in air, a system sensitivity fall-off at ~6 dB/3mm and an imaging speed of 120,000 A-scans per second. We experimentally demonstrate the system’s capability to perform phase-resolved imaging of dynamic blood flow within retina, indicating high phase stability of the SDOCT system. Finally, we show an example that uses this newly developed system to image ...
We demonstrate a 1050-nm spectral domain optical coherence tomography (OCT) system with a 12 mm imaging depth in air, a 120 kHz A-scan rate and a 10 μm axial resolution for anterior-segment imaging of human eye, in which a new prototype InGaAs linescan camera with 2048 active-pixel photodiodes is employed to record OCT spectral interferograms in parallel. Combined with the full-range complex technique, we show that the system delivers comparable imaging performance to that of a swept-source OCT with similar system specifications.
Fourier domain optical coherence tomography requires either a linear-in-wavenumber spectrometer or a computationally heavy software algorithm to recalibrate the acquired optical signal from wavelength to wavenumber. The first method is very sensitive to the position of the prism incorporated in the spectrometer, while the second method drastically slows down the system speed when it is implemented on a serially oriented central processing unit. In this manuscript, a Fourier domain ultra-fast optical coherence tomography system operating in the 1 μm range with real-time data resampling is presented for the first time. It utilizes a newly released 1024 pixels line scan InGaAs ...
Sensors Unlimited. Line Scan Cameras. Sensors Unlimited, Inc. is now SUI, part of Goodrich Corporation. SUI was acquired by Goodrich Corporation on November 1, 2005. In sixteen years, SUI has become the world’s leading manufacturer of indium gallium arsenide (InGaAs) photodiodes, arrays and cameras for near-infrared (NIR) and shortwave infrared (SWIR) imaging applications. Originally founded in 1991 as an advanced research and development company, SUI quickly grew to become a major supplier of InGaAs technology, products, and shortwave IR imaging solutions. Now a member of the ISR Systems Division of Goodrich Corporation, the Sensors Unlimted, Inc. facility features an ISO 9001: 2000 certified manufacturing plant occupying over 20,000 square feet and includes Class 100 clean rooms,and a III-V foundry with an MOCVD epitaxial growth wafer fab. Products built on our proprietary InGaAs platform are SWIR cameras, 1- and 2- dimensional focal plane arrays (FPAs), 10 Gb/s avalanche photodiodes (APDs), plus SUI has the resources to custom design structures and devices for a variety of customer requirements. Current deployments include laser tracking for weapons and communication systems, covert and fixed site surveillance, ground and air UV payloads, gimbal sensor assemblies, night vision and free space communications. Other applications for InGaAs technologies and imaging systems include near-infrared spectroscopy, security and surveillance, linescan inspection, process control, laser beam profiling, microscopy, art inspection and astronomy. The Sensor Unlimited, Inc. management team has a combined total of over 75 years experience in the infrared detector industry, making SUI ready for any shortwave or near infrared imaging challenge. In addition, our highly experienced engineering staff consistently looks to push our technology to the next level, of whom forty-four percent hold an advanced degree. Along with employees, SUI's confidence is rooted in its intellectual property portfolio, which holds 10 patents in InGaAs technology.