THE FUTURE DEPENDS ON OPTICS


A wafer produced with Teledyne Imaging’s Lacera technology


swir camera up to 2.5µm. Te Institute of Nano Sciences at Sorbonne University is researching and producing quantum dot materials of HgTe sensitive in the shortwave to mid-wave infrared wavelength range. Preliminary tests of colloidal quantum dot deposition on NIT read-out circuits have shown impressive results, according to NIT. Emmanuel Lhuillier, CNRS researcher


and NIT Quantum project principal investigator, said: ‘After 10 years of researching infrared imaging nanocrystal films we have been able to obtain


‘We have been able to obtain impressive swir images when coupled to an NIT ROIC’


impressive swir images when coupled to an NIT ROIC. Trough this project, we now enter a step of collaboration to bring this proof of concept to a swir commercially- available camera.’ NIT has recently released swir sensors


made with its in-house stacking technology, which is able to reduce the pixel pitch from 10µm to 7.5µm. Te firm has announced a line scan camera based on the sensor – LiSaSwir, with 2,048, 7.5µm pixels running at 60kHz – and an HD array (1,280 x 1,024 pixels) at 10µm pitch is under qualification. Te company’s stacking technology,


named NH, is able to stack a photodiode array of InGaAs onto a CMOS read-out circuit at pixel level. Te NH technology does not rely on the classical indium bump hybridisation technique, therefore improving the manufacturing yield and lowering the sensor cost. Te quantum dot technology has the


potential to shrink the pixels further. Belgian research institute Imec recently announced a swir quantum dot image sensor – it uses lead sulphide for its quantum dots – with a pixel pitch of 1.82µm.


www.imveurope.com | @imveurope Pierre Potet, CEO of NIT, said: ‘Tis is a


major breakthrough in the life of NIT as this partnership will allow us to offer a full line of swir sensors and cameras in large volumes and at low price. Tis technology benefits from the overall imaging sensor market, as it shares its common manufacturing platforms. No doubt this novel sensor technology will become the standard in swir sensors in three to five years.’ Victor Parahyba, scientific manager of the


NIT Quantum project, added: ‘Te project is built upon some impressive preliminary results that demonstrated the feasibility of the technology and its potential to produce low-cost swir sensors for numerous applications. Te continued partnership between NIT and the Paris Institute of Nanosciences now enters a phase of technological consolidation that will result in a device ready for industrialisation.’


From small to large Elsewhere, Teledyne Imaging has announced large-area CMOS sensor technology for scientific imaging, while OmniVision has released the world’s smallest commercially available sensor for endoscopes and catheters. OmniVision’s OH0TA OVMed medical


image sensor has a package size of 0.55 x 0.55mm, with a 1µm pixel and a 1/31- inch optical format. It has an RGB image resolution of 400 x 400 pixels, runs at 30fps and consumes 20mW of power. Teledyne’s Lacera technology, also called


large-area CMOS, delivers greater than 90 per cent quantum efficiency and low noise architecture with 18-bit readout. It produces deep-cooled, low-noise performance on a multi-megapixel scale with large pixels, global shutter and glow reduction. Lacera sensors will be featured in next-gen CMOS cameras to be announced later this year, including x-ray, EUV and VIS-NIR versions.


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