Optical Engineering最新文献

Lensless 3D-imaging by referenceless phase holography 通过无参照相位全息技术实现无透镜三维成像

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2024-09-01 DOI: 10.1117/1.oe.63.11.111811

Thomas Kreis

{"title":"Lensless 3D-imaging by referenceless phase holography","authors":"Thomas Kreis","doi":"10.1117/1.oe.63.11.111811","DOIUrl":"https://doi.org/10.1117/1.oe.63.11.111811","url":null,"abstract":"Referenceless phase holography (RELPH) is a lensless holographic method that generates the full (amplitude and phase) optical field if intensity and phase distributions of this field in one plane are given as numerical data. It is based on the interference of two pure phase fields that are produced by reflection of two mutually coherent plane waves at two phase modulating spatial light modulators (SLM). The optical field of any real or artificial three-dimensional (3D) scene can be displayed. This means that referenceless phase holography is a promising method for future 3D television or 3D cinema as well as for interferometric metrology. We introduce the theory of RELPH, possible technical realizations, and discuss the numerics. The possibilities and problems in calculating the diffraction fields of given 3D scenes are worked out, modifications of the algorithms are presented. Experiments are shown, not only proving the practicability of RELPH, but also confirming the various 3D cues, such as depth of field, occlusion, and parallax. Two approaches to multicolor display are presented and experimentally verified. The benefits and advantages of RELPH are outlined, open problems and necessary technological developments as well as possibilities and future prospects are discussed.","PeriodicalId":19561,"journal":{"name":"Optical Engineering","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cost-effective, DIY, and open-source digital lensless holographic microscope with distortion correction 具有畸变校正功能的低成本、DIY 和开源数字无透镜全息显微镜

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2024-08-01 DOI: 10.1117/1.oe.63.11.111807

Carlos Buitrago-Duque, Heberley Tobon-Maya, Samuel Zapata-Valencia, Jorge Garcia-Sucerquia

{"title":"Cost-effective, DIY, and open-source digital lensless holographic microscope with distortion correction","authors":"Carlos Buitrago-Duque, Heberley Tobon-Maya, Samuel Zapata-Valencia, Jorge Garcia-Sucerquia","doi":"10.1117/1.oe.63.11.111807","DOIUrl":"https://doi.org/10.1117/1.oe.63.11.111807","url":null,"abstract":"Digital lensless holographic microscopy (DLHM) allows the design of cost-effective systems using off-the-shelf materials, making this type of lensless microscope accessible to many users worldwide. However, these materials may have a limited optomechanical performance that is aggravated due to the sought compactness and the intended cost-effective manufacturing process. This problem particularly affects the illumination source, which is of critical importance for DLHM, as it defines the optical performance of the microscope. While recent reports show that the required point source can be built from a low-cost laser diode coupled to an also low-cost aspheric lens, the resulting illumination has a distorted wavefront that limits the performance of the microscope. A simple homemade setup to correct the distortion of such illumination source and its integration into a compact, cost-effective, DIY, and open-source-certifiable digital lensless holographic microscope, is presented. The distortion-corrected DLHM is validated by imaging calibrated test targets and biological samples, achieving a 12-fold extension on the distortion-free magnification range of previous designs and a doubling of the effective spatial resolution without significant increments in its overall cost.","PeriodicalId":19561,"journal":{"name":"Optical Engineering","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142190203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2024-08-01 DOI: 10.1117/1.oe.63.11.111810

Yassine Tounsi, Manoj Kumar, Karmjit Kaur, Abdelkrim Nassim, Fernando Mendoza-Santoyo, Osamu Matoba

{"title":"Similarity study between speckle shearing phase and speckle correlation phase derivative using Riesz transform","authors":"Yassine Tounsi, Manoj Kumar, Karmjit Kaur, Abdelkrim Nassim, Fernando Mendoza-Santoyo, Osamu Matoba","doi":"10.1117/1.oe.63.11.111810","DOIUrl":"https://doi.org/10.1117/1.oe.63.11.111810","url":null,"abstract":"Speckle metrology techniques utilize the phenomenon of speckle patterns for various measurement applications. Speckle pattern interferometry and speckle shearography are the widely used speckle metrological techniques in diverse fields. In speckle interferometry, the phase map embedded in the speckle pattern fringes is directly proportional to the displacement; however, in speckle shearography, it is related directly to displacement derivative. We aim to explore the relationship between the extracted phase derivative from speckle fringe pattern and the phase from their corresponding shearing fringes along the x and y directions. A speckle fringe pattern and the sheared fringes along the x and y directions are numerically generated. From speckle fringe pattern, the phase derivatives along the x and y directions are extracted by using the Riesz transform algorithm, whereas from the shearing fringes, the phase distribution is extracted by using monogenic signal. The similarity between the phase derivate distribution from speckle fringe pattern and phase distribution from sheared fringe is quantitatively evaluated by using image quality index. Furthermore, application experimental data are also presented.","PeriodicalId":19561,"journal":{"name":"Optical Engineering","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142190204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-view occlusion removal in digital lensless holographic microscopy 在数字无透镜全息显微镜中消除多视角闭塞

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2024-08-01 DOI: 10.1117/1.oe.63.11.111806

Carlos Buitrago-Duque, Samuel Zapata-Valencia, Jorge Garcia-Sucerquia

引用次数: 0

Lensless object classification in long wave infrared using random phase encoding 利用随机相位编码进行长波红外无透镜物体分类

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2024-08-01 DOI: 10.1117/1.oe.63.11.111809

Gregory Aschenbrenner, Kashif Usmani, Saurabh Goswami, Bahram Javidi

引用次数: 0

Design, modeling, fabrication, and characterization of 50 mm diameter focus tunable liquid crystal lens with enhanced optical performance 设计、建模、制造和鉴定具有更佳光学性能的 50 毫米直径聚焦可调液晶透镜