1 / 6

Mechanical Changes Required Due to Proposed IRMS Rx V2

Mechanical Changes Required Due to Proposed IRMS Rx V2. R. Weber September 27, 2011. Windows & CSU. Masking bar thickness. No changes required for window mounts

majed
Download Presentation

Mechanical Changes Required Due to Proposed IRMS Rx V2

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Mechanical Changes Required Due to Proposed IRMS RxV2 R. Weber September 27, 2011

  2. Windows & CSU Masking bar thickness • No changes required for window mounts • Because of the flip in curvature of the focal surface, the CSU supports will need to be shortened by ~4 mm so that the focus is at the incoming edge of the central masking bar, rather than the exiting edge. Or, theinstrument could be positioned ~4 mm further from NFIRAOS. Keck focus (ends of ray pencils) TMT focus (blue arc)

  3. Field Lens IRMS (transparent) MOSFIRE (solid) • Girdle thickness increased from 11.5 to 12.9 mm- better for bonding • Center of girdle shifted 2.694 mm towards CSU- lens mount flexure pockets machined deeper in cell

  4. Collimator Barrel MOSFIRE lenses (solid) IRMS lenses (transparent) • Girdle center shifts: Col #2= -0.5 mm, Col #3= 2.7 mm, Col #4= 1.6 mm, Col #5= 0.03 mm, Col #6= -0.05 mm. • These relatively small shifts in the lens girdle centers should be achievable through a combination of cell spacer shim alterations and/or altering mount flexure pocket depths. • Girdle widths are all comparable or slightly larger than MOSFIRE design- no bonding issues.

  5. Camera Barrel: (Cells #1-#4) MOSFIRE lenses (solid) IRMS lenses (transparent) • Cell #1: girdle center shifts -2.0 mm and girdle thickness increases by 0.8 mm to 12.0 mm; minor cell spacer shim modifications required. • Cell #2: girdle center shifts -1.6 mm and girdle thickness remains the same; minor cell spacer shim modifications required. • Cell #3: girdle center shifts -1.9 mm and girdle thickness decreases by 0.7 mm to 52.7 mm; minor cell spacer shim modifications required. • Cell #4: girdle center shifts -1.9 mm and girdle thickness increases by 0.6 mm to 11.1 mm; minor cell spacer shim modifications required.

  6. Camera Barrel: (Cells #5, #6, & Field Flattener/Detector) MOSFIRE lenses (solid) IRMS lenses (transparent) • Cell #5: girdle center shifts -0.8 mm and girdle thickness increases by 1.8 mm to 9.9 mm; minor cell spacer shim modifications required. • Cell #6: girdle center shifts -1.4 mm and girdle thickness decreases by 2.2 mm to 26.3 mm; minor cell spacer shim modifications required. • Field flattener/detector: girdle center shifts -1.2 mm and girdle thickness increases by 0.6 mm to 9.9 mm; minor cell spacer shim modifications required. IRMS focal surface

More Related