Optical Coherence Tomography

Optical Coherence Tomography (OCT)

An Optical Coherence Tomography (OCT) system uses low coherence interference to measure reflectance versus distance into a material. Light from a semi-broadband source (like a Superluminescent LED) is split into a reference arm (with a fixed mirror) and a sample arm (towards the material to be scanned). The reflected beams from the reference and sample arms are recombined and input to a spectrometer that records the interference pattern vs. wavelength. The periodicity of fringes in the interference pattern is directly related to the depth into the sample material through the Fourier Transform.


Products for Optical Coherence Tomography

Ibsen Photonics spectrometer and grating technology are ideally suited for Spectral Domain-Optical Coherence Tomography (SD-OCT) systems due to the following distinct benefits:

  • High efficiency (optical throughput) for both polarizations due to high efficiency transmission gratings

  • Compact size

  • Robust and athermal design

  • Customizable for multiple wavelength ranges

  • OEM integration friendly design

Ibsen offers the EAGLE OCT-S spectrometer which is very well suited for SD-OCT. Futhermore, we have extensive experience in designing and volume manufacturing of customized spectrometers.

Below is a short list of spectrometers we recommend for SD-OCT


  • 810 – 900 nm wavelength range
  • 0.05 nm resolution
  • 70 kHz frame rate

Want to know more?

For further information see below.

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