Achromatization of Wollaston polarizing beam splitters

Wong, Gerald; Pilkington, Roger; Harvey, Andrew R.

doi:10.1364/ol.36.001332

Cited by 20 publications

(11 citation statements)

References 15 publications

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“…The effect was manifestly negligible over the approximately 50 nm bandwidth used in this work. Recently, Wong et al 47 demonstrated experimentally the achromatization of a Wollaston prism with the use of a compensating prism. An achromatic Wollaston prism assembly of this type may enable single-exposure OBM with a white light source.…”

Section: Discussionmentioning

confidence: 99%

Video-rate imaging of microcirculation with single-exposure oblique back-illumination microscopy

Ford

Mertz

2013

J. Biomed. Opt.

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Abstract. Oblique back-illumination microscopy (OBM) is a new technique for simultaneous, independent measurements of phase gradients and absorption in thick scattering tissues based on widefield imaging. To date, OBM has been used with sequential camera exposures, which reduces temporal resolution, and can produce motion artifacts in dynamic samples. Here, a variation of OBM that allows single-exposure operation with wavelength multiplexing and image splitting with a Wollaston prism is introduced. Asymmetric anamorphic distortion induced by the prism is characterized and corrected in real time using a graphics-processing unit. To demonstrate the capacity of single-exposure OBM to perform artifact-free imaging of blood flow, video-rate movies of microcirculation in ovo in the chorioallantoic membrane of the developing chick are presented. Imaging is performed with a highresolution rigid Hopkins lens suitable for endoscopy.

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Section: Discussionmentioning

confidence: 99%

Video-rate imaging of microcirculation with single-exposure oblique back-illumination microscopy

Ford

Mertz

2013

J. Biomed. Opt.

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“…With a 1D (or linearly variable filter) data is recorded on sequential frames leading to spectral latency, however, this can be reduced by optimising the design according equation (3). Spectral latency can be eliminated using a 2D colour filter or mask.…”

Section: Discussionmentioning

confidence: 99%

“…The optical system is a simplified version of a previously reported system based on image replication [2,3]. In this simplified version, a pair of polarising beamsplitters is used to split an image into two identical sub-images of orthogonal polarisation that are simultaneously projected onto a focal plane array (FPA).…”

Section: Design and Principle Of Operationmentioning

confidence: 99%

Computational polarimetric and multispectral imaging with a variable filter mask

Wong¹,

McMaster²,

Pilkington³

et al. 2013

2013 Saudi International Electronics, Communications and Photonics Conference

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We report on progress made in developing a polarimetric and multispectral imaging (MSI) camera that uses a coded filter mask to record spectral data on either a single frame or only a few frames depending on the design of the mask and the application. The design uses commercially available variable filters and beamsplitters to record spectral data simultaneously on a focal plane array, thus negating the need for scanning mechanisms or dispersive optical elements. The data rate depends on the design of the filter mask, pixel resolution, relative motion between target and camera, and the frame rate. The polarimetric data is recorded on a single frame thus eliminating latency. Multispectral data may be recorded on a few frames or a single frame, thus reducing the need for many multi-frame acquisitions. An optimum mask design matched to the imaging lens and focal plane array resolution, allows an object to be detected against spectral clutter or background on a single pixel. Thus a spatially resolved image is not required, alleviating the need for high magnification which would be a practical limitation where compact optical systems are required.The proof-of-principle is reported that uses a 1D variable filter mask to provide spectra of resolved target images in the near field for the visible spectrum. Test data are presented that show the potential for the concept and how it is readily extended to use a 2D mask in a modified design.

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“…As is well known, the conventional polarization beam splitters used in free-space optical signal processing are generally bulk-type ones by utilizing prism structures [1], [2], which employ natural birefringence of the anisotropic materials. Although the polarization splitting function can be easily realized in optical system, its major drawback is usually cumbersome.…”

Section: Introductionmentioning

confidence: 99%

Novel Approach for Controllable Polarization Beam Splitter: Design and Simulation

Tang

Liao

et al. 2013

IEEE J. Quantum Electron.

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A novel controllable polarization beam splitter is designed by using the modified Y-branch waveguide structure, in which the nematic liquid crystal is introduced. The optical performance of the polarization beam splitter is numerically investigated by the beam propagation method. The results show that not only can high extinction ratio and low optical loss be easily achieved, but also the output ports for TE and TM modes can be dynamically interchangeable in our configuration. Moreover, the proposed polarization beam splitter has little wavelength dependence and large fabrication tolerance. This firstly proposed device provides a unique approach for the manipulation of polarization splitting, which has wide potential application in the photonic integrated circuits.

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Achromatization of Wollaston polarizing beam splitters

Cited by 20 publications

References 15 publications

Video-rate imaging of microcirculation with single-exposure oblique back-illumination microscopy

Video-rate imaging of microcirculation with single-exposure oblique back-illumination microscopy

Computational polarimetric and multispectral imaging with a variable filter mask

Novel Approach for Controllable Polarization Beam Splitter: Design and Simulation

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