Theoretical model of the modulation transfer function for fiber optic taper

Wang, Yaoxiang; Tian, Weijian; Xiangli, Bin

doi:10.1117/12.568767

Cited by 3 publications

(6 citation statements)

References 8 publications

(15 reference statements)

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“…The image displayed on the LCD image plane (pixel size = 35 μm) of the resin printer is sampled The modulation transfer function (MTF) for the fiber-optic taper was calculated and measured to determine the effect of the FOT in transferring images from its base to the top facet. The point image analysis method was used to estimate the theoretical 26 and measured 27 MTF of the FOT used. MTF is the measure of the image contrast to determine the resolution limit on the smaller facet, i.e., with the FOT working as an image demagnifier.…”

Section: ■ Methodsmentioning

confidence: 99%

3D Printing Mesoscale Optical Components with a Low-Cost Resin Printer Integrated with a Fiber-Optic Taper

Wang

Trisno

et al. 2022

ACS Photonics

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Design flexibility, ease of use, and reduced wastage have made additive manufacturing well suited for producing functional prints in many fields including optics. As surface quality is compromised in many cases, postprocessing or better fabrication techniques are required. Advanced fabrication techniques such as two-photon polymerization lithography (TPL) have enabled nanoand microscale fabrications with high surface quality, while postprocessing improves the surface quality of macroscale structures. However, fabricating mesoscale optical components is still challenging as these structures require a lot of time to fabricate with TPL and postprocessing capabilities are limited at these dimensions. Low-cost resin printers are now equipped with 4K resolution screens claiming pixel sizes of ∼35 μm. Still, improvements in print resolution and surface smoothness could be obtained with a simple modification to the setup. Here, we study the impact of introducing a fiber-optic taper to demagnify the images from the screen of a low-cost hobbyist grade resin printer for mesoscale (100 μm to 5 mm) fabrication, achieving a resolution of ∼15 μm half-pitch. We compared normal and modified printing techniques, with gains in resolution used to fabricate a working Fresnel lens.

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Section: ■ Methodsmentioning

confidence: 99%

3D Printing Mesoscale Optical Components with a Low-Cost Resin Printer Integrated with a Fiber-Optic Taper

Wang

Trisno

et al. 2022

ACS Photonics

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“…The authors [25] have shown that in the case of a Lambertian light source the coupling efficiency of light into optical fiber depends on the NA of an optical fiber. PCS fiber (n core = 1.457 and n clad = 1.41) has NA = 0.3671 and Θ m = 21.5°.…”

Section: Calculationsmentioning

confidence: 99%

“…The effectivity of tapered optical element P tap for a Lambertian source was analyzed and the following equation (equation ( 1)) was derived [25]:…”

Section: Calculationsmentioning

confidence: 99%

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A biosensor with encapsuled bioreporters—optical fiber element for enhanced detectection of bioluminescence

Kalabova¹,

Pospı́šilová²,

Siroka³

et al. 2018

Meas. Sci. Technol.

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It is proposed that a whole-cell optical fiber biosensor is used as an in situ first warning detector sensor for online monitoring of environmental pollution (e.g. waste water) in remote localities. The base requirement for this sensor is a very high sensitivity topollution. The work shows a simple way to increase sensor sensitivity, optimizing the shape of an optical fiber element (OFE) for more effective coupling of the low intensity light produced by bioluminescent bioreporters. Theoretical calculations of coupling efficiency showed that only 3.5% of photons produced by one bacterium placed on the front end of polymer-clad silica (PCS) fiber is guided to the detector. Our designed tapered OFEs with immobilized bioluminescent bioreporters Pseudomonas fluorescens HK44, with maximal transmittance, led to a sixfold increase in detected bioluminescence compared to that of the PCS fiber with the same active layer. It is shown that the shape of the OFE determines its transmission. The influences of physical properties and OFE geometry, cell immobilization into silica gel or bacterial plaque, on the intensity of detected light, were evaluated.

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“…This paper mainly analyzes the imaging characteristics of the FODTE utilizing the Fourier analysis method. The input (output) plane of the FODTE [8][9][10] can be regarded as the image dissector which is composed of the optical fibers (pixels) arranged according to specific rules. The input plane of the pixel sampling window is shown in figure 3 (left).…”

Section: The Fourier Analysis Of the Fodte Optics Systemmentioning

confidence: 99%

Fourier analysis of a four-dimensional imaging spectrometer with a fiber optic dimension transform element

Yan¹,

Liu²

2012

J. Opt.

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A four-dimensional imaging spectrometer with a fiber optic dimension transform element has the ability to capture all four dimensions of data (2D spatial, spectral and temporal) with a single, radiometrically calibrated sensor at a single exposure, which satisfies the need to record transient events and fast changing phenomena of interest. In order to analyze the corresponding relation between the input light intensity and the output light intensity of a four-dimensional imaging spectrometer with a fiber optic dimension transform element, this paper utilizes the Fourier optics theory and complex Gaussian functions expansion method to derive and analyze the transmission characteristics of the imaging spectrometer optical system. This paper introduces the light intensity distribution formula when the detector is fixed on the negative first order spectral image plane and establishes and simulates the corresponding relation between the light intensity distribution of the detector and the spatial/spectral information on the target space. The research results show that the target information can be extracted and analyzed directly according to the corresponding relation.

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Theoretical model of the modulation transfer function for fiber optic taper

Cited by 3 publications

References 8 publications

3D Printing Mesoscale Optical Components with a Low-Cost Resin Printer Integrated with a Fiber-Optic Taper

3D Printing Mesoscale Optical Components with a Low-Cost Resin Printer Integrated with a Fiber-Optic Taper

A biosensor with encapsuled bioreporters—optical fiber element for enhanced detectection of bioluminescence

Fourier analysis of a four-dimensional imaging spectrometer with a fiber optic dimension transform element

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