Optical Coherence Tomography

Ibsen Photonics spectrometer and grating technology is 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
  • Resolution down to 50 picometer
  • Integration with almost any CCD detector and Camera type
  • Robustness and thermal stability
  • Single-mode fiber input
  • Compact size


Ibsen has a range of off the shelf transmission gratings that are well suited for SD-OCT. Furthermore, we have extensive experience in designing and volume manufacturing of customized SD-OCT spectrometers.

Contact Ibsen to get more information here.

What is SD-OCT?

An 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 intensity of fringes in the interference pattern is directly related to the depth into the sample material through the Fourier Transform.

Spectral Domain Optical Coherence Tomography (OCT) Setup