scholarly journals Electro-Optical Imaging Technology Based on Microlens Array and Fiber Interferometer

2019 ◽  
Vol 9 (7) ◽  
pp. 1331 ◽  
Author(s):  
Fan Yang ◽  
Wei Yan ◽  
Peng Tian ◽  
Fanxin Li ◽  
Fupin Peng
Keyword(s):  
Optical Imaging ◽  
Microlens Array ◽  
Imaging Systems ◽  
Baseline Length ◽  
Coherent Light ◽  
Imaging Technology ◽  
Interference Fringes ◽  
Partially Coherent Light ◽  
Optical Telescopes ◽  
Light Theory

To reduce the volume and weight of traditional optical telescopes effectively, this article proposes an electro-optical imaging technology based on a microlens array and fiber interferometer. Pairs of microlenses in the microlens array collect light and couple it into a fiber interferometer to form interference fringes. Then the amplitude and phase of a large number of interferometer baselines are analyzed to generate images. In this work, the principle of electro-optical imaging technology has been analyzed according to the partially coherent light theory. The microlens-array arrangement method and baseline pairing method have been optimized for arbitrary targets. From the simulation results, it was found that the imaging resolution depends on the maximum baseline length, and the imaging quality could be effectively improved by adjusting the Nyquist sampling density and baseline pairing method. This technology can provide an important reference for the miniaturization and complanation of imaging systems.

The Influence of Sol-gel Glass Technology on Coherent and Partially Coherent Optical Imaging Systems

1989 ◽  
Vol 175 ◽  
Author(s):  
Nicholas J. Phillips
Keyword(s):  
Optical Imaging ◽  
Sol Gel ◽  
Imaging Systems ◽  
New Work ◽  
Coherent Light ◽  
Colour Centre ◽  
Glass Technology ◽  
Partially Coherent ◽  
Ion Lasers

AbstractThis paper addresses developments in the understanding of intra-cavity elements in ion lasers using sol-gel prepared silica. Growing interest centres around the generation of coherent light in the near u.v. spectrum. Sol-gel silica offers unprecedented levels of purity and homogeneity for critical intra-cavity applications and may well solve the problem of creating colour-centre free Brewster windows for use in the u.v.We also report new work which makes use of the porous phase of such material and show how it is directed at one of the early bastions of photographic science – Lippmann's photography.

scholarly journals The effect of spatial coherence of sources on synthetic aperture mapping

1991 ◽  
Vol 131 ◽  
pp. 10-14
Author(s):  
Daniel F.V. James
Keyword(s):  
Fourier Transform ◽  
Inverse Fourier Transform ◽  
Spatial Coherence ◽  
Full Description ◽  
Coherent Light ◽  
Partially Coherent ◽  
Interference Fringes ◽  
Partially Coherent Light ◽  
The Fourier Transform ◽  
Coherence Area

The interferometric mapping of astronomical objects relies on the van-Cittert Zernike theorem, one of the major results of the theory of partially coherent light [see, Bom and Wolf (1980), chapter 10]. This theorem states that the degree of spatial coherence of the field from a distant spatially incoherent source is proportional to the Fourier transform of the intensity distribution across the source. Measurement of the degree of spatial coherence, by, for example, measuring the visibility of interference fringes, allows the object to be mapped by making an inverse Fourier transform. (For a full description of this technique see Thompson, Moran and Swenson, 1986.)In this paper I present a summary of the results an investigation into what happens when the distant source is not spatially coherent (James, 1990). Using a heuristic model of a spherically symmetric partially coherent source, an analytic expression for the error in the measurement of the effective radius, expressed as a function of coherence area, can be obtained.

Spatial correlation vortices in partially coherent light: theory

2004 ◽  
Vol 21 (11) ◽  
pp. 1895 ◽  
Author(s):  
Ivan D. Maleev ◽  
David M. Palacios ◽  
Arvind S. Marathay ◽  
Grover A. Swartzlander, Jr.
Keyword(s):  
Spatial Correlation ◽  
Coherent Light ◽  
Partially Coherent ◽  
Partially Coherent Light ◽  
Light Theory

Lecture demonstrations on the interference of partially coherent light

1979 ◽  
Vol 129 (9) ◽  
pp. 151
Author(s):  
G.S. Egorov ◽  
S.N. Mensov ◽  
Nikolai S. Stepanov
Keyword(s):  
Coherent Light ◽  
Partially Coherent ◽  
Partially Coherent Light
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