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Opto-Mechanics for SNAP at UM. B. C. Bigelow, UM Physics 10/6/04. Opto-Mechanics for SNAP at UM. Overview of talk: Design of focal plane mosaic components and assemblies Design and analysis of telescope and instrument structures

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opto mechanics for snap at um

Opto-Mechanics for SNAP at UM

B. C. Bigelow, UM Physics

10/6/04

opto mechanics for snap at um1
Opto-Mechanics for SNAP at UM
  • Overview of talk:
    • Design of focal plane mosaic components and assemblies
    • Design and analysis of telescope and instrument structures
    • Optics – support of optics specifications and procurement
    • Design of misc. mechanics and sub-systems

B. C. Bigelow - UM Physics

focal plane mosaics
Focal Plane Mosaics
  • Focal Plane Mosaics:
    • Previous experience with FPM
    • Large focal plane mosaic review for SNAP
    • MCT and CCD packaging designs and FEA
    • Design of discrete filter frames, aperture masks
    • Design of sub-arrays and FPM assemblies
    • More at http://www.physics.lsa.umich.edu/bigelow/snap/index

B. C. Bigelow - UM Physics

previous fpa experience imacs
Previous FPA experience - IMACS

67 Mpx mosaic fully assembled

B. C. Bigelow - UM Physics

previous fpa experience imacs1
Previous FPA experience - IMACS

NGC 2359, 15x15 arcmin

B. C. Bigelow - UM Physics

large fpm review
Large FPM review

ACIS (AXAF Charge-coupled Imaging Spectrograph)

B. C. Bigelow - UM Physics

large fpm review1
Large FPM review

Kepler focal plane mosaic – 90 Mpx

B. C. Bigelow - UM Physics

gaia astro focal plane mosaic
GAIA astro focal plane mosaic

GAIA astro focal plane, 180 CCDs, 2000x4500 px – 1.6Gpx

B. C. Bigelow - UM Physics

gaia astro focal plane mosaic1
GAIA astro focal plane mosaic

First GAIA development detectors have been delivered

B. C. Bigelow - UM Physics

focal plane mosaics1
Focal Plane Mosaics
  • Focal Plane Mosaics:
    • Previous experience with FPM
    • Large focal plane mosaic review for SNAP
    • MCT and CCD packaging studies
    • Design of discrete filter frames, aperture masks
    • Design of sub-arrays and FPM assemblies
    • Files at http://www.physics.lsa.umich.edu/bigelow/snap/index

B. C. Bigelow - UM Physics

mct packaging designs
MCT packaging designs

H2RG package – 3 flat mounting pads and two locating pins

B. C. Bigelow - UM Physics

discrete filter apertures
Discrete filter/apertures

H2RG package with filter frame, filter, and aperture mask

B. C. Bigelow - UM Physics

ir sub module
IR sub-module

Sub-array with CRICs, flex circuits, connectors, local IR electronics (cold), sub-plate heater

B. C. Bigelow - UM Physics

focal plane fully populated
Focal plane fully populated

B. C. Bigelow - UM Physics

snap structures
SNAP structures
  • Design and analysis of structures:
    • Space frames and trusses for OTA
    • Fold and tertiary support trusses
    • Focal plane support truss
    • Spectrograph support truss
    • Athermal struts
    • Composite truss nodes
    • Files at http://www.physics.lsa.umich.edu/bigelow/snap/index

B. C. Bigelow - UM Physics

secondary support structure
Secondary Support Structure

Secondary mirror support FEA model

B. C. Bigelow - UM Physics

tma 63 telescope structure
TMA-63 telescope structure

B. C. Bigelow - UM Physics

tma 65 telescope structure
TMA-65 telescope structure

B. C. Bigelow - UM Physics

tma 65 telescope structure1
TMA-65 telescope structure

B. C. Bigelow - UM Physics

spectro installed
Spectro installed

FP assembly with spectrograph included (note redundant str.)

B. C. Bigelow - UM Physics

snap optics
SNAP optics
  • Optics:
    • Supporting development of telescope optics specifications
      • mirror figure specifications
      • mirror AR coatings
    • Opto-mechanics for mirrors
      • fold mirror models
    • Participating in TDM/TPF-C mirror design reviews
      • at request of M. Lampton and E. Cohen (JPL)

B. C. Bigelow - UM Physics

misc opto mechanics
Misc. opto-mechanics
  • Other sub-systems:
    • Alternative shutter designs
    • Alternative telescope baffles
    • Calibration systems, projector optics, sources (LEDs)

B. C. Bigelow - UM Physics

alternate shutters
Alternate shutters

Rotating barrel shutter

B. C. Bigelow - UM Physics

slide24
Telescope lower baffle

Baffles fully enclose optical system, FPA

B. C. Bigelow - UM Physics

future work
Future work
  • Focal Plane Mosaic
    • Preliminary design (detector packages, sub-assys, baseplate)
    • Fabricate prototype parts, vibration and/or thermal testing?
  • Telescope Structures
    • 2.25 - 2.5m telescopes
    • Detail design of nodes, optics interfaces
    • Carbon-fiber prototypes (nodes, struts, structures)
  • Optics
    • TDM/TPF-C developments, design reviews
    • Review of commercial design studies
    • Site visits to optics/OTA vendors

B. C. Bigelow - UM Physics

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