Quantum dot SWIR to compete with InGaAs

Share this on social media:

The first shortwave infrared camera built on quantum dot sensor technology has been launched by US firm SWIR Vision Systems.

The company says the camera will compete directly with InGaAs SWIR cameras by delivering higher resolution, lower cost, and global exportability to the vision industry.

The Acuros SWIR camera has HD resolution of 1,920 x 1,080 pixels (2.1 megapixels). It uses a 400nm to 1,700nm broadband image sensor with colloidal quantum dot (CQD) thin film photodiodes fabricated monolithically on silicon readout wafers. The quantum dots are layered directly onto CMOS readout integrated circuits using well-established semiconductor deposition techniques, which keep costs down.

The technology was shortlisted for a Vision Award at last year’s Vision show in Stuttgart.

Colloidal quantum dot sensors have lower quantum efficiency than InGaAs sensors. However, when paired with relatively inexpensive active illumination, the camera can give near-InGaAs equivalent performance with a reduction in overall system cost, according to SWIR Vision Systems.

Acuros cameras feature: InGaAs-equivalent noise, pixel operability greater than 99 per cent, 15µm pixel pitch, and can image at speeds up to 380fps via GenICam-compliant GigE Vision and USB3 Vision interfaces.

George Wildeman, CEO of SWIR Vision Systems, said: ‘Our intent is to drive down the cost per megapixel in SWIR imaging, disrupting the cost and performance curve for vision systems designers.’

The company will exhibit its cameras at the Automate trade fair in Chicago from 8 to 11 April, demonstrating the camera’s utility and value for silicon inspection, machine vision, surveillance and security systems, hyperspectral imaging, and other core SWIR applications.

Further reading: Dr Ethan Klem, Allan Hilton, and George Wildeman from SWIR Vision Systems discuss the performance, fabrication, and cost trade-offs of CQD sensors versus InGaAs

Related news

08 April 2021

The swir detector will be integrated into the Copernicus Land Surface Temperature Monitoring satellite, and will measure surface temperatures of land experiencing drought

08 March 2021

Lynred will invest €2.8m in R&D to develop small pixel pitch SWIR detectors, while New Imaging Technologies has partnered with the French National Research Agency on SWIR quantum dot sensors

09 February 2021

French firm New Imaging Technologies has joined the effort to produce SWIR image sensors with smaller pixels

Image: Silina

26 July 2021

Being able to curve multiple image sensors simultaneously opens up the ability to scale the process. Curving a sensor improves image quality without complex lenses

06 May 2021

The GTOF0503 sensor features a 5µm three-tap iToF pixel, incorporating an array with a resolution of 640 x 480 pixels

Lacera wafer

10 February 2021

The firm's Lacera technology delivers greater than 90 per cent quantum efficiency and low noise architecture with up to 18-bit readout