Wavelength-coded volume holographic imaging endoscope for multidepth imaging

Isela D. Howlett; Wanglei Han; Photini Rice; Jennifer K. Barton; Raymond K. Kostuk

doi:10.1117/1.JBO.22.10.100501

2 October 2017 Wavelength-coded volume holographic imaging endoscope for multidepth imaging

Isela D. Howlett, Wanglei Han, Photini Rice, Jennifer K. Barton, Raymond K. Kostuk

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Journal of Biomedical Optics, Vol. 22, Issue 10, 100501 (October 2017). https://doi.org/10.1117/1.JBO.22.10.100501

Abstract

A wavelength-coded volume holographic imaging (WC-VHI) endoscope system capable of simultaneous multifocal imaging is presented. The system images light from two depths separated by 100 μm in a tissue sample by using axial chromatic dispersion of a gradient index probe in combination with two light-emitting diode sources and a multiplexed volume hologram to separate the images. This system is different from previous VHI systems in that it uses planar multiplexed gratings and does not require curved holographic gratings. This results in improved lateral imaging resolution from 228.1 to 322.5 lp/mm. This letter describes the design and fabrication of the WC-VHI endoscope and experimental images of hard and soft resolution targets and biological tissue samples to illustrate the performance properties.

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Isela D. Howlett, Wanglei Han, Photini Rice, Jennifer K. Barton, and Raymond K. Kostuk "Wavelength-coded volume holographic imaging endoscope for multidepth imaging," Journal of Biomedical Optics 22(10), 100501 (2 October 2017). https://doi.org/10.1117/1.JBO.22.10.100501

Received: 5 July 2017; Accepted: 13 September 2017; Published: 2 October 2017

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KEYWORDS

Holograms

Endoscopes

Holography

Imaging systems

Image resolution

Volume holography

Light emitting diodes

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