Výsledky vyhledávání - "Fixed-focus lens"

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Delay-and-Sum Processing of Echo Data of Transducers Focused by 3D Printed Lenses

Autor: Bernhard G. Zagar, Daniel Eder, Michael Schwarz

Publikováno v: 2020 IEEE International Ultrasonics Symposium (IUS).

This contribution deals with focusing piezoelectric ultrasonic transducers with 3D printed lenses. Transducers focused with a fixed focus lens are often used, e. g., in scanning acoustic microscopy because of their high lateral spatial resolution in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::31a6c83b021e8f34165f551e7fa45b59
https://doi.org/10.1109/ius46767.2020.9251389

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Method of Measuring the Distance to an Object Based on One Shot Obtained from a Motionless Camera with a Fixed-Focus Lens

Autor: Krzysztof Murawski

Publikováno v: Acta Physica Polonica A. 127:1591-1596

(Received May 12, 2014) The paper presents the method of measuring the distance to the object based on digital image processing. The solution is characterized in that the distance measurement to the object is performed by a motionless camera with est

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::99027b5ed0467391ff92f92893d2ddb7
https://doi.org/10.12693/aphyspola.127.1591

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Measurement of Membrane Displacement with a Motionless Camera Equipped with a Fixed Focus Lens

Autor: Krzysztof Murawski

Publikováno v: Metrology and Measurement Systems, Vol 22, Iss 1, Pp 69-78 (2015)

The paper presents a technique for measuring membrane displacements with one motionless camera. The method consists in measuring the distance to an object based on one image obtained from a motionless camera with a fixed-focus lens. The essence of th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe9516a1fe2c0506e76e394e367f867c
http://www.degruyter.com/view/j/mms.2015.22.issue-1/mms-2015-0011/mms-2015-0011.xml?format=INT

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Monocular 3D metric scale reconstruction using depth from defocus and image velocity

Autor: Tomoyuki Shiozaki, Gamini Dissanayake

Publikováno v: IROS

© 2017 IEEE. This paper presents a novel approach to metric scale reconstruction of a three-dimensional (3D) scene using a monocular camera. Using a sequence of images from a monocular camera with a fixed focus lens, metric distance to a set of feat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69b7a8b916458f4d921602c4ab8e376d
https://hdl.handle.net/10453/120187

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The Mars Science Laboratory (MSL) Mast cameras and Descent imager: Investigation and instrument descriptions

Publikováno v: Earth and space science (Hoboken, N.J.), vol 4, iss 8
Earth and Space Science (Hoboken, N.j.)

The Mars Science Laboratory Mast camera and Descent Imager investigations were designed, built, and operated by Malin Space Science Systems of San Diego, CA. They share common electronics and focal plane designs but have different optics. There are t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::944cfc1453bdddff88a95c08f73d8529
https://escholarship.org/uc/item/32w4x6ch

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Light field 3D endoscope based on electro-wetting lens array

Autor: Jin Su Lee, Yong Hyub Won, Gyu Suk Jung

Publikováno v: SPIE Proceedings.

In this study, we propose light field 3D endoscope using the electro-wetting lens array. Compared to conventional light field endoscope technology, the electro-wetting micro lens array are not only switchable between 2D and 3D, but also adjusts the f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c4fc26b98cf2a58991d7f29bdb87c3ad
https://doi.org/10.1117/12.2251660

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Extending the Depth of Field in a Fixed Focus Lens Using Axial Colour

Autor: Christopher Dainty, Niamh Fitzgerald, Alexander V. Goncharov

Publikováno v: Optical Design and Fabrication 2017 (Freeform, IODC, OFT).

We propose a method of extending the depth of field to twice that achievable with conventional photographic lenses using axial colour introduced by dual flash illumination. The lens parameters can be found analytically via raytracing.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b511375dcaa85038c1e0b8b04b939e58
https://doi.org/10.1364/iodc.2017.ith4a.4

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Different environmental conditions from the effects of repetitive fixed focus lens of long focal distance

Autor: Feng Xiaoxuan, Huan Ren, Yang Yi, Ma Yurong, Yuan Quan, Zhendong Shi, Ma Ke, Zhang Lin, Ma Hua

Publikováno v: SPIE Proceedings.

In many long focal distance lens focal length detection method, laser confocal combined focal length measurement with ultra high focusing accuracy, more and more attention and application. The accurate measurement of the distance between the lens foc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eb7eedb74670ee26740ee10f543f817e
https://doi.org/10.1117/12.2245567

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Evaluate depth of field limits of fixed focus lens arrangements in thermal infrared

Autor: Norbert Schuster

Publikováno v: SPIE Proceedings.

More and more modern thermal imaging systems use uncooled detectors. High volume applications work with detectors that have a reduced pixel count (typically between 200x150 and 640x480). This reduces the usefulness of modern image treatment procedure

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::438603e986e9ddcde072c6c3abeacf39
https://doi.org/10.1117/12.2223559

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