Terms Related to Lens
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
A Reflection on Teaching Lens Design
Lens Design OPTI 517 College of Optical Sciences University of Arizona Overview MULTI-CONFIGURATION SYSTEMS Copyright © 2018 Mary G. Turner 2 What is a multi-configuration system? • Any optical system which has more than one way for the light to travel from object to image • The Multi-Configuration Editor (MCE) is used to specify the differences between the different modes • Any system or surface property can be “switched” via the MCE, including: – Aperture size, type – Material – Fields, wavelengths – Thickness (including object) Copyright © 2018 Mary G. Turner 3 Some types of MC systems • Some applications requiring use of MCs include: – Zoom lenses • Position of elements varies – Athermalized lenses • Temperature and pressure varies – Multiple-path systems • Lenslet arrays • Interferometers • Beam splitters Copyright © 2018 Mary G. Turner 4 Some types of MC systems • … as well as: – Scanning systems • Polygon scanners • F-θ scan lenses – Switchable component systems • Discrete zooms • Combination optics such as objective-eye lens pairs – Complex materials • Birefringent prisms Copyright © 2018 Mary G. Turner 5 Limitations to MC • Zemax is still sequential: – Each configuration represents a separate, independent sequential path – A separate MF is needed for each path to be optimized • Configurations can have relative weighting • Be “ignored” during optimization Copyright © 2018 Mary G. Turner 6 MC systems • What appears to be a multi-path system is actually independent designs, occupying some common space: = + Copyright © 2018 Mary G. Turner 7 ZOOM LENSES Copyright © 2018 Mary G.8 Turner Zoom lenses • A single optical system that can be adjusted for many focal lengths Overall scene http://blog.vidaao.com/wp- content/uploads/different-focal- lengths.png Minute details Copyright © 2018 Mary G. -
Forming Thermal Imaging System Field of View with Afocal Lens Cap
Forming thermal imaging system field of view with afocal lens cap Igor G. Chyzha, Valentin G. Kolobrodova, Volodymyr I. Mykytenkoa, Grygorij S. Tymchika, Paweł Komadab, Ainur Kozbakovac,d aNational Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"; bLublin University of Technology; cInstitute Information and Computational Technologies CS MES RK; dAlmaty University of Power Engineering and Telecommunications ABSTRACT Method of infrared lenses field of view step variation is discussed in this paper. Simple afocal lens caps based on the classic Kepler or Galilee telescopic schemes are considered. The afocal cap have to provide acceptable vignetting of the extreme rays and moderate transverse dimensions. Mersenne two-mirror system of Galilean-type was selected as the most suitable lens cap. Equations were obtained to calculate dimensional parameters of the cap in respect that vignetting coefficient should be minimal. Keywords: Galilean-type rotary lens afocal cap, Mersenne two-mirror afocal system, thermal imager field of view, field of view vignetting 1. INTRODUCTION Optoelectronic imaging systems are widely applied to observe environment. Frequently observers need to change viewing angle or field of view of the imager1, 2, 3.Thermal imager field of view is commonly varied with zoom infrared lenses or with afocal lens cap. Zoom lenses provide smooth change in the focal length and field of view of the thermal imager, but they have complex optical system and relatively high cost4, 5. Vario-optic lens cap has less complex optical system. However, it is not free from the shortcomings of zoom lenses due to the difficulty in ensuring adequate image quality at various positions along the axis of it’s medium components6–9. -
Two-Optical-Component Method for Designing Zoom System
Two-optical-component method for designing zoom system Mau-Shiun Yeh Abstract. A new method is presented to solve a zoom system in which Nationa' Chiao Tung University the lenses are divided into two combined units, and each combined unit Institute of Electro-Optical Engineering is defined as an optical component. It is shown that most zoom systems 1001 Ta Hsueh Road can be considered as two-component systems and can be solved using Hsin Chu 30050, Taiwan principal plane techniques of optical component, and the first-order zoom system design is thus made easier. The theory with some examples are Shin-Gwo Shiue described. National Science Council Precision Instrument Development Center Subject terms: zoom lenses; zoom design. The Executive Yuan Optical Engineering 34(6), 1826-1834 (June 1995). 20 R&D Road VI Science-Based Industrial Park Hsin Chu 30077, Taiwan Mao-Hong Lu National Chiao Tung University Institute of Electro-Optical Engineering 1001 Ta Hsueh Road Hsin Chu 30050, Taiwan E-mail: [email protected] 1 Introduction cussedits solvable region. Oskotsky5 described a grapho- Mostof the many published papers concerning zoom have analytical method for the first-order design of two-lens zoom concentrated on the first-order zoom design. A zoom system systems and the canonic equation of the lens motion and is generally considered to consist of three parts: the focusing, discussed the region of Gaussian solution. zooming, and fixed parts. The focusing part is placed in front There are mainly two categories of zoom systems: one is of the zooming part, to adjust the object distance. -
Terrestrial Planet Finder Coronagraph Science and Technology Definition
JPL Document D-34923 Terrestrial Planet Finder Coronagraph Science and Technology Definition Team (STDT) Report Editors: Marie Levine, Stuart Shaklan and James Kasting (Penn State University) June 12, 2006 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California TPF-C STDT REPORT ii TPF-C STDT REPORT Approvals iii TPF-C STDT REPORT Goals for the Terrestrial Planet Finder Coronagraph Mission The question "are we alone?" has its roots deep in human consciousness, and its answer could revo- lutionize our world view. Starting with Galileo's invention of the telescope 400 years ago, which he used to prove the existence of other worlds, and continuing through a century of astonishing dis- coveries—galaxies, stars, planets, and distant oceans—science has given us a dramatically clearer pic- ture of the universe and our place within it. Today, we finally have tools within reach to seek life be- yond Earth, and to answer this age-old question. The Terrestrial Planet Finder-Coronagraph (TPF-C) mission is a giant step towards that goal. Over the last decade, extrasolar planets have been discovered around nearly 200 nearby stars. Most of these planetary systems are quite different from our own—with Jupiter-sized planets orbiting close to their parent stars—mainly because radial velocity measurements are most sensitive to such planets. New observing techniques, such as coronagraphy and nulling interferometry, are needed to detect smaller, Earth-like planets by their own light and to characterize them as possible harbors for life. Characterization of a terrestrial-sized planet at its most fundamental level means learning about its mass, diameter, temperature, and atmospheric and surface composition. -
Basic Astronomy Labs
Astronomy Laboratory Exercise 6 About Your Eyes The human eye is the most widely used astronomical instrument; it is, therefore, an appropriate subject for study in an astronomy lab. Many other astronomical instruments require an intelligent eye. Understanding the functions and limitations of the eye will be helpful in using other astronomical instruments. Vision involves three distinct steps: (1) a geometrical optics step, in which light from an object is focused on the retina; (2) a detection step, in which rod and cone cells in the retina detect incident light; and (3) a data processing step, in which electrical signals produced by stimulated detector cells are interpreted. The latter step is accomplished by nervous networks in both the retina and brain, and also involves memory functions. This lab will explore the detection step. Figure 6-1 is an anatomical drawing of the major parts of a human eye ball. The eye focuses light to form images on the retina by refracting (or bending) the incident light with the cornea and the lens. The principal refracting surface of the human eye is the cornea. That is to say, the cornea functions as a lens to focus light on the retina. The part of the eye called the lens serves mainly to adjust the focal length of the cornea-lens system. The lens is said to provide accommodation for distance, meaning that it changes its shape to allow images to be brought into focus on the retina for objects at different distances from the eye. The shape of the lens is controlled by the ciliary muscles in the eye. -
1 Adaptive Elastomer-Liquid Lenses for Advancing the Imaging
Adaptive Elastomer-liquid Lenses for Advancing the Imaging Capability of Miniaturized Optical Systems Dissertation Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Hanyang Huang Graduate Program in Biomedical Engineering The Ohio State University 2019 Dissertation Committee Professor Yi Zhao, Advisor Professor Jun Liu Professor Derek Hansford 1 Copyrighted by Hanyang Huang 2019 2 Abstract Advanced imaging capabilities, such as macro/microscopic imaging, wide-angle imaging, optical zooming, stereoscopic imaging, adaptive focusing and depth perception, are often preferable in optical imaging systems. In conventional optical imaging systems, these functions are typically implemented through replacement and/or precise displacement of multiple solid optical elements. This may complicate the optical system configuration and increase the overall system dimension and cost. New adaptive optics approaches that can incorporate advanced imaging capabilities in miniaturized optical systems are thus of imperative needs. Optofluidic elastomer-liquid lenses which are constructed by encapsulating an optical fluid within a deformable cavity made of solid materials have attracted considerable attention in the recent past. Like the human eye lens, elastomer-liquid lenses have a deformable shape by adjusting the fluid pressure, allowing for fast focusing the objects of interest. They provide a new route for designing and improving miniature and adaptive imaging devices by courtesy of their compact size and tunable optical powers. However, the low image resolution due to optical aberrations remains as a primary limitation of optofluidic lenses. There are few studies providing a practical approach to compensating optical aberrations without compromising the miniaturization and the range of adaptive refractive power. -
Part 14: Optical System Classification
1 Design and Correction of optical Systems Part 14: Optical system classification Summer term 2012 Herbert Gross Overview 2012-04-18 1. Basics 2012-04-18 2. Materials 2012-04-25 3.Components 2012-05-02 4. Paraxial optics 2012-05-09 5. Properties of optical systems 2012-05-16 6.Photometry 2012-05-23 7. Geometrical aberrations 2012-05-30 8. Wave optical aberrations 2012-06-06 9. Fourier optical image formation 2012-06-13 10.Performance criteria 1 2012-06-20 11.Performance criteria 2 2012-06-27 12.Measurement of system quality 2012-07-04 13.Correction of aberrations 1 2012-07-11 14.Optical system classification 2012-07-18 Content 14.1 Overview and classification 14.2 Achromate 14.3 Collimator 14.4 Microscope optics 14.5 Photographic optics 14.6 Zoom lenses 14.7 Telescopes 14.8 Miscellaneous 14.9 Lithographic projection systems Field-Aperture-Diagram w ° Classification of systems with photographic Biogon field and aperture size 40° lithography Braat 1987 ° Scheme is related to size, 36° correction goals and etendue 32° of the systems Triplet 28° Distagon ° Aperture dominated: 24° Disk lenses, microscopy, Sonnar Collimator 20° projection 16° ° Field dominated: split double triplet Gauss lithography Projection lenses, 12° 2003 camera lenses, projection projection constant Gauss Petzval etendue 8° Photographic lenses micro micro micro micros- 100x0.9 10x0.4 40x0.6 copy 4° achromat diode collimator ° Spectral widthz as a correction disc collimator focussing 0° requirement is missed in this chart 00.2 0.4 0.6 0.8 NA Typical Example Systems 1 1. -
Book IV Lens
D DD DDD DDDDon.com DDDD Basic Photography in 180 Days Book IV - Lens Editor: Ramon F. aeroramon.com Contents 1 Day 1 1 1.1 History of photographic lens design .................................. 1 1.1.1 Early photographic camera lenses ............................... 1 1.1.2 Meniscus or 'landscape' lens ................................. 3 1.1.3 Petzval Portrait lens ...................................... 3 1.1.4 Overcoming optical aberrations ................................ 4 1.1.5 Aperture stops ........................................ 4 1.1.6 Telephoto lens ......................................... 7 1.1.7 Anastigmat lens ........................................ 8 1.1.8 Cooke Triplet ......................................... 9 1.1.9 Tessar ............................................. 9 1.1.10 Ernostar and Sonnar ..................................... 9 1.1.11 Asymmetric double Gauss .................................. 11 1.1.12 Anti-reflection coating .................................... 12 1.1.13 Retrofocus wide-angle lens .................................. 14 1.1.14 Fisheye lens .......................................... 16 1.1.15 Macro lens .......................................... 16 1.1.16 Supplementary lens ...................................... 16 1.1.17 Zoom lens ........................................... 19 1.1.18 Rise of Japanese optical industry ............................... 21 1.1.19 Catadioptric “mirror” lens .................................. 21 1.1.20 Movable element prime lens ................................. 22