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Integration of optical waveguide technology with multi-channel color sensors for enhanced urine test strip analysis system 25

Integration of optical waveguide technology with multi-chann...

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conference on current developments in lens design and optical engineering XXV

作者： Li, Yi-Ming Lee, Tsung-Xian Natl Taiwan Univ Sci & Technol Grad Inst Appl Sci & Technol 43Keelung RdSec 4 Taipei 106335 Taiwan Natl Taiwan Univ Sci & Technol Grad Inst Color & Illuminat Technol 43Keelung RdSec 4 Taipei 106335 Taiwan

ISBN: (纸本)9781510679221;9781510679238

Urine test strips aid in prompt health assessment through color changes, but visual interpretation can be misleading, particularly with strips having multiple functions. To tackle this, some companies and studies have created paper strip analyzers using CMOS sensors. However, issues like ambient light and shooting angles often cause detection failures. Therefore, this study proposes integrating a multi-channel color sensor as the core component of a urine test strip analysis system and optical waveguide technology for optical system design architecture. This design aims to capture more color information in urine, and the optical waveguide technology ensures uniform light guidance, providing real-time transmission and high-quality signal data for urine analysis systems.

关键词： urine test strips multi-channel color sensor optical waveguide light-emitting diode

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The design of the Prism Film on the optical Concentrator for Photovoltaic Applications 19

The Design of the Prism Film on the Optical Concentrator for...

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19th conference on current developments in lens design and optical engineering

作者： Ying, Shang-Ping Chen, Bing-Mau Yang, Pao-Keng Jaing, Cheng-Chung Minghsin Univ Sci & Technol Dept Optoelect Syst Engn 1 Xinxing Rd Hsinchu 30401 Taiwan

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

As an application of the PV technology, building integrated photovoltaic (BIPV) technologies have attracted an increasing interest in the past decade. One of these BIPV elements is the luminescent solar concentrators (LSCs). The LSC consists of a transparent plate embedded with luminescent dyes or inorganic particles, and the solar cells are attached on one or more sides. The incoming sunlight absorbed by the luminescent dyes or inorganic particles re-emits at a longer wavelength, and part of the re-emitting light trapped in the transparent plate reaches the PV cell attached on the LSC and convert it to electricity. However, the efficiency of the LSCs is still low at this stage. The surface loss on the top surface of the transparent plate is one of the main losses in LSCs. The prism film in liquid-crystal display (LCD) module is used to collimate the light in the module and enhance the overall brightness, and would be used in the LSCs to enhance the incoming sunlight to the solar cells attached on the end of the transparent plate. Then the design of the prism film is important. In this study, the ray-tracing simulation is used to investigate the optical characteristics of the LSC with the prism film covered on the top surface of the transparent plate. Different structure of the prism film will be considered to enhance the light reaches the PV cell attached on the LSC.

关键词： Prism film optical design optical Concentrator

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The improved optical setup for Abbe-Porter experiment 18

The improved optical setup for Abbe-Porter experiment

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conference on current developments in lens design and optical engineering xviiI

作者： Borovytsky, V. Hudz, O. Antonenko, V. Natl Tech Univ Ukraine Igor Sikorsky KPI Opt Engn Dept Pr Peremogy 37 UA-03056 Kiev Ukraine

ISBN: (纸本)9781510612082;9781510612075

The interesting experiments for investigation of image formation in optical microscopes have been done by E. Abbe, A. Porter and L. Mandelshtam. These experiments have become the classical ones and they are widely used for explanation of Fourier optics. The principal disadvantage of them is difference in optical schemes for observation of object images and their spatial spectrums. The proposed optical setup makes possible demonstration of two stages of image formation - obtaining a spatial spectrum and composing a magnified object image - together in one plane. This setup contains two imaging channels separated by a beam splitter after a microscope objective. The first one forms a magnified object image, the second one - an image of a spatial spectrum. These images may be observed on a screen, via eyepieces or using image sensors. Any occluding of spectrum zones becomes visible and it leads to the corresponded changes in an object image. This optical setup would be useful for optical education and research.

关键词： Abbe-Porter experiment Abbe theory Fourier optics image formation microscopy resolution optical education Fourier transform

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Overview of Diffraction Gratings Technologies for Space-flight Satellites and Astronomy 15

Overview of Diffraction Gratings Technologies for Space-flig...

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conference on current developments in lens design and optical engineering XV

作者： Cotel, Arnaud Liard, Audrey Desserouer, Frederic Bonnemason, Francis Pichon, Pierre HORIBA Jobin Yvon SAS F-91165 Longjumeau France

ISBN: (纸本)9781628412192

The diffraction gratings are widely used in Space-flight satellites for spectrograph instruments or in ground-based telescopes in astronomy. The diffraction gratings are one of the key optical components of such systems and have to exhibit very high optical performances. HORIBA Jobin Yvon S.A.S. (part of HORIBA Group) is in the forefront of such gratings development for more than 40 years. During the past decades, HORIBA Jobin Yvon (HJY) has developed a unique expertise in diffraction grating design and manufacturing processes for holographic, ruled or etched gratings. We will present in this paper an overview of diffraction grating technologies especially designed for space and astronomy applications. We will firstly review the heritage of the company in this field with the space qualification of different grating types. Then, we will describe several key grating technologies developed for specific space or astronomy projects: ruled blazed low groove density plane reflection grating, holographic blazed replica plane grating, high-groove density holographic toroidal and spherical grating and transmission Fused Silica Etched (FSE) grism-assembled grating.

关键词： Holographic Ruled Blazed Diffraction Gratings optical Components Low stray light Diffraction Efficiency Reflection Grating

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Measurement of lens focal length using multi-curvature analysis of Shack-Hartmann wavefront data

Measurement of lens focal length using multi-curvature analy...

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conference on current developments in lens design and optical engineering V

作者： Neal, DR Copland, J Neal, DA Topa, DM Riera, P WaveFront Sci Inc Albuquerque NM 87123 USA

ISBN: (纸本)0819454613

The lens is one of the most commonly used optical elements. Yet it is sometimes difficult to make accurate effective focal length and pupil position measurements, especially for long focal length lenses. Many measurement methods rely on a mechanical measurement to determine the back focal length, or may require careful operator discrimination in determining the best focus position. Aberrations may confuse an automatic focal length measurement system. However, an accurate determination of the optical properties of a lens is often critical for building an accurate system model. We have developed a method for measurement of the focal length, pupil plane and collimation positions of positive lenses using a Shack-Hartmann wavefront sensor. The SHWFS uses a micro-optic lens array to separate the incoming wavefront into a pattern of focal spots. The position of these focal spots is related to the local wavefront slope. Wavefront reconstruction allows the complete incident wavefront to be retrieved. A Zernike decomposition reconstructor is used to separate the effects of lens focal power from other aberrations. The lens under test is illuminated by a point source on a computer-controlled stage. The transmitted wavefront was recorded by the SHWFS while the source was translated over a few mm range. By analyzing the Zernike coefficient associated with defocus, we were able to extract the focal length, pupil plane and collimation positions using a least squares fitting procedure. This procedure was tested for a variety of lenses of varying focal lengths, from 10 to 1000 mm focal length, and showed excellent repeatability and accuracy. These measurements were compared to knife-edge, manufacturer's specification, and ray-tracing analysis for verification testing.

关键词： focal length wavefront sensor Shack-Hartmann Hartmann-Shack lens testing optical testing optical metrology lens testing focal length measurement lens power vergence

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Research on Angle-selective Filters of Phosphor Color Wheel for LED Projectors

Research on Angle-selective Filters of Phosphor Color Wheel ...

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conference on current developments in lens design and optical engineering XI - and Advances in Thin Film Coatings VI

作者： Wei, Tzu-Chiao Kuo, Chien-Cheng Huang, June-Jei Lee, Cheng-Chung Natl Cent Univ Thin Film Technol Ctr Dept Opt & Photon Chungli 320 Taiwan Delta Elect Inc Tainan Taiwan

ISBN: (纸本)9780819482822

We have designed and fabricated angle-selective filters to increase the luminous throughput of a blue light emitting diode (LED) and its associated color wheel. The emission direction was tailored to increase the light emission in the useful direction by using multilayer optical coating with alternating high and low refractive indices layers. The angle selective filters limit the luminance angle to less than an acceptance angle of 30 degrees for green and red on the phosphors color wheel. The filters increase the luminance efficiency by converging and recycling the light. The color performance of the phosphors color wheel was improved and gave an advantage of energy saving in the LED projector.

关键词： optical thin film angle selective filter phosphor color wheel Light Emitting Diode

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Multichannel-optical prism 23

Multichannel-optical prism

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conference on current developments in lens design and optical engineering XXIII Part of SPIE Optics and Photonics conference

作者： Ryzhikov, Lev 136 Newtown Ave Unit 7 Norwalk CT 06851 USA

ISBN: (纸本)9781510654198;9781510654181

currently, many optical tests required simultaneous measurement values of various technological or metrological parameters. This demand primarily applies to pieces or parts of products that are under variable load during operation. These technological measurements primarily relate to production and metrological works. Examples include optical testing of deformations of parts (e.g., plates) under variable load, shifts of various components of high-precision equipment, and, of course, various metrological measurements of high-precision equipment, such as lithographic machines and different types of measuring and control devices. Simultaneous measurement of the same parameter in different parts of the product allows for to determination of the error (e.g., deformation or alignment error) in object position during operation. Observation and analysis of the position of specific points on the object allow one to judge deviations both in position and deformation of the measured surface. The proposed multichannel optical prism can simultaneously observe several points located on the different parts of the object, as well as monitor their movements and deformations in working conditions. This information allows you to determine the operating conditions of various structural elements during real operation. The multichannel prism should be built into the optical circuit of the measuring (metrological) device. The use of prisms of this type allows simultaneous observation of the movement (deformation) of various parts of the observed objects. Some examples of such kinds of optical devices with a build-in multichannel prism will be discussed below.

关键词： Prisms optical components Measurement devices Metrology Channel projecting optics optical alignment optical circuits optical testing Relays Sensors

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design of a head-mounted display with freeform mirrors 20

Design of a head-mounted display with freeform mirrors

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conference on current developments in lens design and optical engineering XX

作者： Rui, Congshan Zeng, Chunmei Hu, Tiantian Ma, Suodong Soochow Univ Sch Optoelect Sci & Engn Suzhou 215006 Peoples R China Soochow Univ Educ Minist China Key Lab Adv Opt Mfg Technol Jiangsu Prov Suzhou 215006 Peoples R China Soochow Univ Educ Minist China Key Lab Modern Opt Technol Suzhou 215006 Peoples R China

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

A head-mounted display (HMD) requires a large field of view (FOV) and a large exit pupil diameter while maintaining a compact structure. In this paper, we show a head-mounted display design comprising two freeform mirrors covering a 28 degrees full field-of-view with an eye relief of 15mm. The simplified partial differential equation (PDE) method is applied in the design of a two-mirror HMD system. Then the data points on the unknown freeform mirrors are calculated using the rays from multiple fields and are used to construct the freeform mirrors in the HMD system, which is taken as a starting point. This simplified partial differential equation method makes calculations easier. The anamorphic surface and the XY polynomial freeform surface are used in the two freeform mirrors for improving the image quality, respectively. The optimization strategy is also described in detail. The final HMD system operates at F/3.75 with 8mm exit pupil diameter achieving good imaging performance.

关键词： Geometric optical design mirror system design head-mounted display optical freeform surface

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Athermalizing Mounted Doublets With ALLVAR Alloys 25

Athermalizing Mounted Doublets With ALLVAR Alloys

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conference on current developments in lens design and optical engineering XXV

作者： Monroe, James A. Fehlberg, Olivia Zavislan, James M. ALLVAR 1201 East Fayette St Syracuse NY 13210 USA Tucson Adv Design & Assembly Ctr Edmund Opt 2650 E Elvira RdSte 102 Tucson AZ 85756 USA Univ Rochester Inst Opt 480 Intercampus Dr Rochester NY 14627 USA

ISBN: (纸本)9781510679221;9781510679238

Thermal requirements often constrain optical designs resulting in cost or performance compromises. Unless an optical system is designed from the start considering thermal requirements, effects including thermal defocus can become detrimental to the system's real-world performance. Novel negative thermal expansion ALLVAR Alloys enable a new degree of freedom during initial system design or can be used to passively athermalize an existing optical system without having to re-design. This work discusses the analysis and integration of ALLVAR Alloy 30 into an optomechanical housing to athermalize mounted commercial off-the-shelf (COTS) doublets. Calculations for the thermal defocus of the doublets and the requisite opto-mechanics to athermalize each system are first presented. The target athermalization of the doublets is also discussed. The ALLVAR Alloy 30 athermalized doublet assemblies are then manufactured, built, and tested. The results of the as-built data and testing are presented as compared to the thermal defocus analysis. This work demonstrates that an existing optical system design can be athermalized by utilizing an ALLVAR Alloy material in the optomechanical design.

关键词： Athermalization thermal Negative Thermal Expansion ALLVAR Alloy Doublet Optomechanics optomechanical design

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Conception of a cheap infrared camera using a Fresnel lens 15

Conception of a cheap infrared camera using a Fresnel lens

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conference on current developments in lens design and optical engineering XV

作者： Grulois, Tatiana Druart, Guillaume Guerineau, Nicolas Crastes, Arnaud Sauer, Herve Chavel, Pierre Off Natl Etud & Rech Aerosp French Aerosp Lab Chemin Huniere F-91127 Palaiseau France ULIS ZI Iles Cordees F-38113 Voroize France CNRS Inst Opt Lab Charles Fabry F-91127 Palaiseau France

ISBN: (纸本)9781628412192

Today huge efforts are made in the research and industrial areas to design compact and cheap uncooled infrared optical systems for low-cost imagery applications. Indeed, infrared cameras are currently too expensive to be widespread. If we manage to cut their cost, we expect to open new types of markets. In this paper, we will present the cheap broadband microimager we have designed. It operates in the long-wavelength infrared range and uses only one silicon lens at a minimal cost for the manufacturing process. Our concept is based on the use of a thin optics. Therefore inexpensive unconventional materials can be used because some absorption can be tolerated. Our imager uses a thin Fresnel lens. Up to now, Fresnel lenses have not been used for broadband imagery applications because of their disastrous chromatic properties. However, we show that working in a high diffraction order can significantly reduce chromatism. A prototype has been made and the performance of our camera will be discussed. Its characterization has been carried out in terms of modulation transfer function (MTF) and noise equivalent temperature difference (NETD). Finally, experimental images will be presented.

关键词： Thermal imaging microbolometers diffractive lenses low-cost applications

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