Wasatch Photonics has expanded its Cobra OCT spectrometer product line to include new models for 550nm vis-OCT and long-range 800nm OCT imaging. These two new variants of SD-OCT imaging access structural and functional information in wavelength ranges only accessible through cost-effective SD-OCT technology, and can deliver high resolution images at line scan rates up to 250kHz.
The new Cobra VIS models operate at visible wavelengths, leveraging the differential absorption of oxy- and deoxy-hemoglobin at 500-600nm to provide depth-resolved, localised oxygenation mapping concurrently with the acquired OCT image. This addition of functional information to the existing structural image can be used to improve understanding and diagnosis of pathology, with applications in high resolution retinal imaging, 3D microscopy, and angiography.
Specific benefits of the new models include imaging at up to 1.9mm depths, and up to twice the resolution of 800nm OCT imaging. Proprietary optics correct for chromatic aberration and reduce roll-off to as little as 6dB at 1.2mm imaging depth.
The long-range imaging Cobra-S 800 OCT spectrometer provides up to 12mm imaging range at 800nm. This allows long-range imaging of the full anterior chamber and other curved surfaces to be accomplished in a single shot using 800nm OCT. While 1,300nm is traditionally used for OCT imaging at depths beyond 4-5mm, this new Cobra-S model extends the reach of 800nm OCT to depths of more than 1cm at half the cost, with no loss in image resolution.
The new Cobra OCT spectrometer models open up two new operating regimes for OCT – blood oxygenation mapping and greater depths at lower cost – while delivering low roll-off, high resolution, high speed images.