Transcription
Project DocumentationDLNIRSP-DOC-102Revision ADiffraction-Limited Near-IR SpectropolarimeterLong Lead ItemsPeter Onaka, Helen McGregor, Haosheng Lin, Tom SchadUniversity of HawaiiInstitute for Astronomy5 November 2014Prepared By:Helen McGregorApproved By:Haosheng Lin10-21-2014Released By:Institute for Astronomy , University of Hawaii.Phone 808-956-8312dlnirsp-project@ifa.hawaii.edu2680 Woodlawn Drive, Honolulu, HI 96822http://www.ifa.hawaii.edu Fax 808-988-2790
Project DocumentationDLNIRSP-DOC-102Revision AREVISION SUMMARY:1. Date:5 November 2014Revision: Revision A (finalized by T.Schad)Changes: Add DWDM filters to list (H.Lin)Page 1 of 6
Project DocumentationDLNIRSP-DOC-102Revision ATABLE OF CONTENTS1. INTRODUCTION . 41.1 SCOPE OF THE DOCUMENT . 41.2ACRONYMS. 42. DL-NIRSP LONG LEAD ITEMS. 52.1 OPTICAL COMPONENTS . 52.1.12.1.22.1.3Mirrors & Lenses . 5Integral Field Units . 5Bandpass Isolation Filters . 52.2 MECHANICAL COMPONENTS . 52.2.1Spectrograph Optical Table. 52.3 LONG LEAD ITEM TABLE . 5Page 2 of 6
Project DocumentationDLNIRSP-DOC-102Revision ATABLESTable 1 DL-NIRPS Long Lead Time Item List . 5Page 3 of 6
Project DocumentationDLNIRSP-DOC-102Revision A1. INTRODUCTION1.1SCOPE OF THE DOCUMENTThis document lists the long-lead-time items that may pose a schedule risk to the DL-NIRSP project.1.2ACRONYMSDL-NIRSP – Diffraction Limited Near-IR SpectropolarimeterPage 4 of 6
Project DocumentationDLNIRSP-DOC-102Revision A2. DL-NIRSP LONG LEAD ITEMSDL-NIRSP design calls for the use of off-the-shelf components whenever possible. Therefore, themajorities of the motion control and opto-mechanical components have lead-time less than 24 months,and are not considered to have significant schedule risk to the project.2.12.1.1OPTICAL COMPONENTSMirrors & LensesSeveral powered mirrors of DL-NIRSP are off-axis aspheres, some also with fast focal ratio. Their leadtimes are expected to be more than 24 weeks.2.1.2Integral Field UnitsThe BiFOIS IFUs of the project are custom design and built components. It requires multi-step, preciselycontrolled fabrication processes to produce the science-grade IFUs that meet the project requirements.The lead-time of the IFUs is estimated to be 24 – 32 weeks.2.1.3Bandpass Isolation FiltersThe bandpass isolation filters of the DL-NIRSP are based on the Dense Wavelength Division andMultiplexing (DWDM) filter technology developed by the telecommunication industry. The primaryoperating wavelength of telecommunication optical fiber is near 1,550 nm. The technology has beenextended into the near-IR and visible wavelengths in previous projects. Nevertheless, the fabrication ofthe BIFs for DL-NIRSP will takes more than 24 weeks to accomplish.2.22.2.1MECHANICAL COMPONENTSSpectrograph Optical TableThe spectrograph optical table is a mosaic of 4 small custom-sized tables. Their lead time is 24 weeks.2.3LONG LEAD ITEM TABLETable 1 DL-NIRPS Long Lead Time Item ListPartsDL-NIRSP Feed Optics OAM1 (Off Axis Mirror 1)DL-NIRSP Feed Optics MF24 (F/24 Mirror)DL-NIRSP Feed Optics MF62-1 (F/62 Mirror 1)DL-NIRSP Feed Optics MF62-2 (F/62 Mirror 2)PurchasedFabricationLead Time(weeks)XXXX24242424Page 5 of 6
DL-NIRSP F8 Coronal Lens 1DL-NIRSP SpectroGraph OAM (Off-Axis Mirror)DL-NIRSP IFU-36DL-NIRSP IFU-72Spectrograph Optical XXXXXXXXProject DocumentationDLNIRSP-DOC-102Revision A242424-3224-3224242424242424242424242424Page 6 of 6
This document lists the long-lead-time items that may pose a schedule risk to the DL-NIRSP project. 1.2 ACRONYMS DL-NIRSP – Diffraction Limited Near-IR Spectropolarimeter . Project Documentation DLNIRSP-DOC-102 Revision A Page 5 of 6 2. DL-NIRSP LONG LEAD ITEMS DL-NIRSP design calls for the use of off-the-shelf components whenever possible. Therefore, the majorities of the motion control
