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Studies of the manufacturability of the HOE included in objective of BD/DvD combined optical pick-up head according to the objective lens glass type - art. no. 66670O

Studies of the manufacturability of the HOE included in obje...

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Conference on current developments in Lens design and optical engineering vIII

作者： Lisitsyna, N. v. Bauman Moscow State Tech Univ Moscow 105005 Russia

ISBN: (纸本)9780819468154

The new combined optical pick-up head for recording and playback of information on DvD and BD format discs was developed. The same objective is used for both channels. It consists of the objective lens and Holographic optical Element. In this work we present the main results of the studies of the possibility to manufacture the HOE included in objective of BD/DvD combined optical pick-up head in the dependence on objective lens glass type.

关键词： optical data storage diffractive optics

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Development of fast camera objective for spectrograph of Mont Megantique telescope

Development of fast camera objective for spectrograph of Mon...

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Conference on current developments in Lens design and optical engineering v

作者： Thibault, S Wang, M Bernier, S INO Opt Design Grp St Foy G1P 4S4 PQ Canada

ISBN: (纸本)0819454613

A fast (F/1.55) and wide-angle refractive camera objective has been developed to work with a large-size CCD on the focal plane of the spectrograph of Mont Megantique telescope for large spectral coverage from Uv to vIS and up to NIR. The novel camera objective has been designed and optimized with three different glass combinations in order to have higher throughputs for large spectral coverage, especially in Uv region. The tolerance analysis of the camera objective is given in the paper. The final opto-mechanical design of the objective is discussed with the consideration of the manufacturing tolerance in the optical and mechanical parts, as given in this paper. The used components have been minimized to reduce the light inherent lost. The optical testing results displayed the good optical performance of the camera with the required resolution for the whole FOv, as predicted by the optical simulation and computation. The broadband AR coating, enhanced on Uv region, have been used on each surface of the lenses in the optical system.

关键词： optical engineering fast spectrograph camera opto-mechanical design astronomical instrumentation

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Fiber-optical system for visualization of inner pipe defects by microrobot.

Fiber-optical system for visualization of inner pipe defects...

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Conference on current developments in Lens design and optical engineering v

作者： Gradetsky, v Krabchuk, L Kniazkov, M Solovtsov, v Tulaikova, T Simakova, M Russian Acad Sci Inst Prob Mech Moscow 119526 Russia

ISBN: (纸本)0819454613

The control systems of the miniature robots are suggested for their motion over internal surfaces inside of the small diameter tubes. The mechanical system information-measuring sensor and control systems are considered. Three versions of the mechanical systems are suggested: electromagnetic, triad wheels and conversion of rotation motion to translation one. The electromagnetic mechanism use push pull tipe method for translation motion realization. Developed schemes in the modules design of control systems were checked experimentally on the robot's prototypes. Some results of the computer simulation illustrate the multilink robot control motion along the internal diameters of the tubes. This work was fulfilled under financial support of the Russian Found of Fundamental researches N 01-01-00913 and in frames of Federal Multi Purpose Scientific and Technical Program of Ministry of Industry, Science and Technologies: "Researches and developments on priority directions of science and technology", "Knowledgeable basic investigations" block, "Basic investigations at the field of physics sciences" part Mechanics.

关键词： minirobot in-tube motion mechanical system control algorithms on-board microprocessor control schemes

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Photoelectric simulation of perovskite solar cells based on two inverted pyramid structures

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Physics Letters, Section A: General, Atomic and Solid State Physics 2025年 552卷

作者： Liu, Yongjing Liu, Mengsi Yang, Hua Yi, Zao Zhang, Han Tang, Chaojun Deng, Juan Wang, Junqiao Li, Boxun School of Physics and Optoelectronic Engineering Yangtze University Hubei Jingzhou434023 China School of Science Lanzhou University of Technology Lanzhou730050 China School of Mathematics and Science Joint Laboratory for Extreme Conditions Matter Properties Southwest University of Science and Technology Mianyang621010 China Hubei Feilihua Quartz Glass Co. Ltd Jingzhou434000 China College of Physics Zhejiang University of Technology Hangzhou310023 China School of Physics Zhengzhou University Zhengzhou450001 China School of Physics and Optoelectronics Xiangtan University Xiangtan411105 China

The reduction of the optical and electrical losses in perovskite solar cells (PSCs) is pivotal to enhancing their overall efficiency. According to the light trapping effect and the enhancement of electron transport capacity, we propose a perovskite solar cell based on two inverted pyramid structures through numerical simulation. The etching of inverted pyramids in fluorine doped SnO2 (FTO) layer structure is a strategy employed to enhance the absorption of perovskite solar light, thereby optimizing the photoelectric performance of the cell. The TiO2 inverted pyramid structure was introduced beneath the electron transport layer TiO2, thereby altering the contact interface between the light absorption layer CH3NH3PbI3 and the electron transport layer. This modification resulted in an increased contact area and enhanced electron transport capability. Furthermore, a comparative analysis was conducted on the photoelectric characteristics of PSCs with planar type, only TiO2 inverted pyramid structure, only FTO etching inverted pyramid structure, and PSCs with both inverted pyramid structures. The results of this study indicate that the cell with these two inverted pyramid structures exhibits optimal photoelectric performance, characterized by a maximum short-circuit current density of 23.81 mA/cm2, a power conversion efficiency of 19.73 %, and an overall thickness of 1200 nm. These findings offer valuable insights for the subsequent design of high-performance PSCs. © 2025 Elsevier B.v.

关键词： Surface plasmon resonance

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Micro-optical elements for optical wireless applications

Micro-optical elements for optical wireless applications

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Conference on current developments in Lens design and optical engineering XIv

作者： Jin, Xian Guerrero, Daniel Klukas, Richard Holzman, Jonathan F. Univ British Columbia Sch Engn Integrated Opt Lab Kelowna BC V1V 1V7 Canada Univ British Columbia Sch Engn Posit & Navigat Signal Proc Lab Kelowna BC V1V 1V7 Canada

ISBN: (纸本)9780819496911

Customized high-contact-angle microlenses are presented for optical wireless communication (OWC) and optical wireless location (OWL) applications. These microlenses are fabricated by way of an electro-dispensing technique to establish wide field-of-views (FOvs). Each microlens is formed from dispensed Uv-curable polymer with pressure-control defining the microlens volume and a voltage on the metal needle tip defining the microlens shape (by way of electrowetting). Uv curing is then applied. Microlenses with FOvs up to 90 degrees are fabricated for high-density integration above a CMOS imaging sensor for wide-FOv operation in emerging OWC and OWL applications. Both theoretical ray-tracing analyses and experimental imaging results are presented with good agreement.

关键词： electro-dispensing field-of-view imaging sensor microlens optical wireless numerical aperture

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Saddle points in the merit function landscape of systems of thin lenses in contact

Saddle points in the merit function landscape of systems of ...

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Conference on current developments in Lens design and optical engineering v

作者： Bociort, F Serebriakov, A van Turnhout, M Delft Univ Technol Opt Res Grp NL-2628 CJ Delft Netherlands

ISBN: (纸本)0819454613

The merit function landscape of systems of thin lenses in contact, which are perhaps the simplest possible types of optical systems, shows remarkable regularities. It is easier to understand how the optimization parameter space of these simple systems is divided into basins of attraction for the various local minima if one focuses on the (Morse index 1) saddle points in the landscape rather than on the local minima themselves. The existence and the basic properties of these saddle points can be predicted by thin-lens theory, which is applied on a simplified model of the merit function containing only third-order spherical aberration. The predictions of this simplified model are confirmed by numerical results obtained with a typical merit function based on ray tracing.

关键词： global optimization saddle points thin lens theory spherical aberration optical system design

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Mirror mount bonding process for the COSTAR and STIS programs. 6

Mirror mount bonding process for the COSTAR and STIS program...

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current developments in optical design and engineering vI Conference

作者： Buzzetta, v Ball Aerospace and Technologies Corp. (United States)

ISBN: (纸本)0819422517

This paper describes the process and methods to bond the Corrective Optics Space Telescope Axial Replacement and Space Telescope Imaging Spectrograph optics to their mounts. The optics on the two programs were all fabricated to .01 waves rms surface figure. These high quality optics for the Hubble Space Telescope required extreme care to mount. Since they must operate down to 1200 angstroms, contamination and minimizing surface distortion were serious concerns. The process produced excellent results. No significant surface distortion or contamination was induced.

关键词： optic mount bonding optics urethane adhesive Uv optics Hubble

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Use of a new synthesis algorithm to design polarization insensitive optical coatings

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Proceedings of SPIE - The International Society for optical engineering 1994年 2262卷 187-197页

作者： DeBell, Gary W. Tikhonravov, Alexander v. Trubetskov, Michael K. DeBell Design Los Altos CA USA

The design of polarization insensitive optical coatings via use of the needle synthesis algorithm in combination with second order optimization methods is explored. Several designs produced with this technique are pre... 详细信息

ISBN: (纸本)0819415863;9780819415868

关键词： optical coatings

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Including detector effects in the design of wide-field imaging systems

Including detector effects in the design of wide-field imagi...

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Conference on current developments in Lens design and optical engineering v

作者： Harvey, JE Atanassova, M Krywonos, A Univ Cent Florida CREOL Orlando FL 32826 USA

ISBN: (纸本)0819454613

Most imaging systems today include a mosaic detector array in the focal plane. optical designers of astronomical telescopes typically produce a design that yields a superb on-axis aerial image in the focal plane, and detector effects are included only in the analysis of the final system performance. Aplanatic optical designs (corrected for spherical aberration and coma) are widely considered to be superior to non-aplanatic designs. However, there is little merit in an aplanatic design for wide-field applications because one needs to optimize some field-weighted-average measure of resolution over the desired operational field-of-view (OFOv). Furthermore, when used with a mosaic detector array in the focal plane, detector effects eliminate the advantage of the aplanatic design even at small field angles. For wide fields-of-view, the focal plane is frequently despaced to balance field curvature with defocus thus obtaining better overall performance. We will demonstrate that including detector effects in the design process results in a different optimal (non-aplanatic) design for each OFOv that is even superior to an optimally despaced aplanatic design.

关键词： detector effects wide-field imaging systems grazing incidence X-ray telescopes

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Unique aspects of designing & tolerancing an optical testing system

Unique aspects of designing & tolerancing an optical testing...

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Conference on current developments in Lens design and optical engineering v

作者： Hadaway, JB Reardon, PJ Univ Alabama Ctr Appl Opt Huntsville AL 35899 USA

ISBN: (纸本)0819454613

The design & tolerancing of an optical testing system (OTS) presents a unique set of challenges not generally encountered during the typical optical design process. The authors have spent the past six years developing and using a series of optical systems designed to measure the surface figure & radius-of-curvature of various ultra-lightweight mirrors at 30 K. These mirrors were part of a technology development program to support NASA's James Webb Space Telescope (JWST). The design of these systems required consideration of the following: (i) potentially large figure errors in the test mirror (due to gravity sag & cryo-distortion), (ii) cryo-shrinkage of the aperture and radius-of-curvature, (iii) figure changes due to the use of mirror actuators, and (iv) vibration between the OTS & the test mirror. In addition, an exhaustive tolerancing process was required for each system in order to reach a set of alignment tolerances that were achievable using the equipment available and within the test environment. The authors found many aspects of the OTS design process to be significantly different from the norm;at the same time, however, viewing the process as a typical optical design problem often-times brought clarification. This paper will describe both the differences and the similarities observed between the design of an OTS as opposed to a traditional imaging system.

关键词： optical design tolerancing optical testing cryogenic

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