A ballistic gravimeter with dropping holographic grating

Dmitriev, A. L.; Котова, Е. И.; Nikushchenko, E. M.; Smirnova, A. L.; Prokopenko, V. T.

doi:10.1134/s0030400x1411006x

Cited by 2 publications

(1 citation statement)

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“…HOEs are emerging as viable alternatives to conventional optical elements in many applications due to their light weight, low cost and simple fabrication technique [42][43][44][45][46]. They have potential applications in optical and opto-electronic systems such as imaging applications (coherent imaging, broadband imaging, white light imaging) [47][48][49][50][51][52], non-imaging applications (filters, solar concentrators) [53,54], optical information processing (pattern recognition, information encoding, optical interconnection, optical switching, phase shifting and modulation) [55][56][57][58], optical-fiber communications (wavelength multiplexers, de-multiplexers, couplers and branching elements) [59][60][61][62], optical scanners (bar-code readers, facsimile systems, computer printers, point-of-sale-scanners and laser displays) [63,64], optical sensors (finger print sensors, humidity and temperature sensors) [65,66], optical disc pickup heads (compact audio and video disc players and computer disc drives) [67,68], optical beam shaping [69], optical micromanipulation [70], defense applications (holographic head-up displays, weapon sights, night vision glasses) [71][72][73][74], conical scanning lidar telescopes [75], laser doppler anemometry [76] and many others [77][78][79]…”

Section: Introductionmentioning

confidence: 99%

Design and fabrication of different types of holographic lenses, with analysis of their imagery and aberration

Ghosh¹,

Nirala²

2017

Meas. Sci. Technol.

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In this communication we have experimentally investigated and realized the following for the first time to the best of our information: two new types of hololenses; three compact two hololens imaging systems consisting of one each of the first and second type, one each of the second and first type, and two of the second type for coherent one to one imagery; and three compact four hololens imaging systems consisting of two of each of the first and second types, two of each of the second and first type, and four of the second type to form low f-number imaging systems. In addition, problems with the existing two hololens and four hololens imaging systems are discussed in the present study and a modified geometry is proposed with supporting mathematical analysis and experimental evidence. To reduce the problems of alignment difficulty, degrees of freedom and bulkiness associated with two hololens imaging systems, a third type of hololens is also reported, which can perform coherent one to one imagery by itself. All the imaging systems consisting of hololenses can perform imaging free from almost all monochromatic aberration for the conditions under which they were recorded. Complete analyses of recording, playback, imagery and aberration for all the hololenses and the compact two and four hololens imaging systems are performed. The resolution of all three types of hololenses is found to be 57 lines mm−1, whereas the resolution of the compact two hololens imaging systems is 32 lines mm−1. The average diameter of the focused spots of the first, second and third type of hololens are experimentally found to be 344.45 µm, 339.75 µm and 190.22 µm respectively.

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