Why Use SWIR Cameras?

Short Wave Infrared Radiation (SWIR) is defined as light in the 900-2500 nm range. Many important materials, chemical, and biophysical processes will either transmit or emit infrared light in this spectral range. In many cases the sensor will need to have a 2D format and often with high imaging resolution. The following applications will be discussed and it will be explained why SWIR cameras are add more value than imaging at other spectral bands.

Semiconductor Wafer Analysis

Important materials such as semiconductor wafers have spectral transmission properties similar to silicon (right).

VIS and UV light in principle can provide higher spatial resolution in a microscope configuration to observe micron and sub-micron defects; however, the sample optical absorbance would be way to high. Advances in both SWIR LED light illumination and SWIR microscope design has made it possible to achieve both high optical transmission and sub-micron spatial resolution. As a result of these technical and design advantages, SWIR microscopy is now an important tool in semiconductor material metrology.

SWIR camera models best aligned for this market include the SenS 640V-ST, 640M-ST640G-STSenS HiPe, and SenS 1280.

Silicon Spectral Absorbance Spectrum

Live Animal Imaging

SWIR cameras opens new opportunities for deep tissue imaging for in-vivo applications. Traditionally, for deep tissue imaging ionizing radiation is used (X-ray and Y-ray) but poses some risks to biological tissue.

SWIR or NIR2 (1300-1400nm) has the following advantages:

  1. Stronger transmission than NIR band
  2. Lower scattering
  3. Commercially available and FDA approved dyes show strong emission in the NIR2 band.

We can configure microscopes for your live animal imaging or fluorescence imaging application.

Suggested SWIR cameras for these types of application include:  640V-ST640V-STP640G-STPHiPe, and Sens 1280

SWIR Microscope

Laser Profiling and Tracking with SWIR Cameras

SWIR lasers designed for industrial, medical, research, and military applications often need an accurate assessment of the power distribution across the entire beam waist. To align with this application a SWIR sensor is needed with properties that include: wide dynamic range, good linear response, resistance to laser damage, and a mitigation of optical fringing effects.

We have SWIR cameras in our product family aligned with SWIR laser beam profiling. Suggest cameras for laser profiling 320V-ST, 640V-ST, 640M-ST, and 640G-STE. You can order all these cameras without a sensor window or with an AR coated sensor window at no extra charge.

Our SWIR cameras have the fastest gating speeds available at 100 nsec. and ultra high timing precision to track and image a laser pulse. See the video to the right for a full explanation of how our SWIR cameras enable laser tracking including lasers that do not have an available trigger. Suggested cameras for laser tracking include 640V-STP, 640M-STP, and 640G-STE.

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