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            <name>Title</name>
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                <text>Conference Papers</text>
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    <name>Conference Paper</name>
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          <name>Title</name>
          <description>A name given to the resource</description>
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              <text>Design and Simulation of 6.2m Wide-Field Telescope for Spectroscopic Survey</text>
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          <name>Subject</name>
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              <text>Active Optics; Segmented Mirror Telescope; Spectroscopy; Survey; Wide Field</text>
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          <name>Description</name>
          <description>An account of the resource</description>
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              <text>The upcoming large astronomical telescopes are trending towards the Segmented Primary Mirror due to technological advancements &amp;amp; manufacturing feasibility. We have designed a wide-field optical IR spectroscopic survey telescope that can deliver spectra of several millions of astronomical sources. The baseline design of this telescope is a 6.2 m segmented primary mirror with hexagonal mirror segments of 1.44m size, intersegment Edge sensors, and soft positioning actuators. The telescope is designed to provide a 2.5deg FOV achieved through a system of wide field corrector lenses with a design residual ~0.2". Also, it delivers an f/3.61 beam suitable for directly feeding optical fibres. A mechanical concept of the telescope is designed with a truss-based mirror cell to support the segmented primary mirror and keep the deformation to a minimum. As the primary mirror is segmented, the deformation due to different disturbances like wind, vibration and thermal effects must be corrected to a nanometer accuracy to make it act like a monolithic primary mirror. This is achieved through an active control system using three actuators and six inter-segment edge sensors. A simulation tool, codeSMT, is built based on the state-space model of a soft actuator with Multiple-Input Multiple-Output (MIMO) capability to incorporate dynamic wind disturbance from the IAO Hanle site and vibration effects. A detailed error multiplier analysis is performed numerically using this tool and is in good agreement with analytical calculations. A parameter sensitivity analysis is performed to fine-tune the primary mirror control system variables. This paper presents the Optical, Mechanical and Active Control system design approach of a 6.2m wide-field telescope currently under conceptual design.  2024 SPIE.</text>
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          <name>Creator</name>
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              <text>Deshmukh P.; Sriram S.; Chand T.; Kambhala S.; Ramya S.; Joshi R.; Bharat Kumar Y.; Muthhar M.</text>
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              <text>Proceedings of SPIE - The International Society for Optical Engineering, Vol-13094</text>
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          <name>Publisher</name>
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              <text>SPIE</text>
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          <name>Date</name>
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              <text>2024-01-01</text>
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              <text>&lt;a href="https://doi.org/10.1117/12.3018252" target="_blank" rel="noreferrer noopener"&gt;https://doi.org/10.1117/12.3018252&lt;/a&gt;
&lt;br /&gt;&lt;br /&gt;&lt;a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85205548649&amp;amp;doi=10.1117%2F12.3018252&amp;amp;partnerID=40&amp;amp;md5=a921885a68c229270256056dfcffd629" target="_blank" rel="noreferrer noopener"&gt;https://www.scopus.com/inward/record.uri?eid=2-s2.0-85205548649&amp;amp;doi=10.1117%2f12.3018252&amp;amp;partnerID=40&amp;amp;md5=a921885a68c229270256056dfcffd629&lt;/a&gt;</text>
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              <text>Restricted Access</text>
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              <text>ISSN: 0277786X; ISBN: 978-151067511-7; CODEN: PSISD</text>
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          <name>Format</name>
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              <text>Online</text>
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          <name>Language</name>
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            <elementText elementTextId="163532">
              <text>English</text>
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          <name>Type</name>
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              <text>Conference paper</text>
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              <text>Deshmukh P., Indian Institute of Astrophysics, Bengaluru, 560034, India; Sriram S., Indian Institute of Astrophysics, Bengaluru, 560034, India, CHRIST Deemed to be University, Bengaluru, 560029, India; Chand T., Indian Institute of Astrophysics, Bengaluru, 560034, India; Kambhala S., Indian Institute of Astrophysics, Bengaluru, 560034, India; Ramya S., Indian Institute of Astrophysics, Bengaluru, 560034, India; Joshi R., Indian Institute of Astrophysics, Bengaluru, 560034, India; Bharat Kumar Y., Indian Institute of Astrophysics, Bengaluru, 560034, India; Muthhar M., Indian Institute of Astrophysics, Bengaluru, 560034, India</text>
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