title: Two-channel algorithm for single-shot, high-resolution measurement of optical wavefronts using two image sensors.
abstract: We propose a two-channel holographic diversity interferometer (2ch-HDI) system for single-shot and highly accurate measurements of complex amplitude fields with a simple optical setup. In this method, two phase-shifted interference patterns are generated, without requiring a phase-shifting device, by entering a circularly polarized reference beam into a polarizing beam splitter, and the resulting patterns are captured simultaneously using two image sensors. However, differences in the intensity distributions of the two image sensors may lead to serious measurement errors. Thus, we also develop a two-channel algorithm optimized for the 2ch-HDI to compensate for these differences. Simulation results show that this algorithm can compensate for such differences in the intensity distributions in the two image sensors. Experimental results confirm that the combination of the 2ch-HDI and the calculation algorithm significantly enhances measurement accuracy.
authors.forename: Jin
authors.initials: J
authors.lastname: Nozawa
authors.forename: Atsushi
authors.initials: A
authors.lastname: Okamoto
authors.forename: Atsushi
authors.initials: A
authors.lastname: Shibukawa
authors.forename: Masanori
authors.initials: M
authors.lastname: Takabayashi
authors.forename: Akihisa
authors.initials: A
authors.lastname: Tomita