Novel two-dimensional single-shot optical imaging system by VIPA-comb interferometry

Takumi Miyaoka; Tatsutoshi Shioda

doi:10.1117/12.2185168

1 July 2015 Novel two-dimensional single-shot optical imaging system by VIPA-comb interferometry

Takumi Miyaoka, Tatsutoshi Shioda

Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 965536 (2015) https://doi.org/10.1117/12.2185168
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of

Abstract

We propose a novel system for a two-dimensional (2-D) single-shot tomography and profilometry that can be realized by installing a Virtually Imaged Phased Array (VIPA) into a 2-D interferometer with a CCD. The VIPA simultaneously outputs incoherent optical frequency combs (OFC) whose teeth interval, such as free-spectral range (FSR), are scanned as a function of its output angle when the low-coherent light source is incident into the VIPA. Thus, the single-shot imaging can be realized with the FSR scanned Fourier-domain OFC interference monitored by the CCD. In other words, the fast imaging without mechanical moving part can be operated by the proposed OFC interferometry. And VIPA can use all of incident light. So this system enables to realize a high energy efficient interference measurement.

FSR of the output light of the VIPA is nonlinear with respect to the sweep direction. So we simulated the characteristics of the VIPA. As a result, we knew linearity optimal output angle depend on reflective index of the VIPA. And the VIPA can change the measurement range on the CCD by the number. In other word, the VIPA can zoom in and out no mechanical part. We will present the operation principle with its confirmed results in terms of both simulation and experiment.

Citation Download Citation

Takumi Miyaoka and Tatsutoshi Shioda "Novel two-dimensional single-shot optical imaging system by VIPA-comb interferometry", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 965536 (1 July 2015); https://doi.org/10.1117/12.2185168

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KEYWORDS

Interferometry

Charge-coupled devices

CCD image sensors

Terahertz radiation

Tomography

Imaging systems

Light sources

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