1. USP-IAG Universidade de São Paulo
Brazilian Tunable Filter Imager (BTFI) Preliminary Design Review (PDR)‏
BTFI Opto-Mechanics
(Rene Laporte)
Version 1.0
USP-IAG Universidade de São Paulo
18-19th June 2008 1

2. FPP = High Resolution
FPI = Low Resolution
FPI
FPP K0
IFI
IFP
IFI = Interference Filter -
Image Plane
IFP = Interference Filter -
Pupil Plane K1 F1
F1 – iBTF (VPHG1)
simple rotation F2
F2 – iBTF (VPHG2)
rotation + translation E C B A

3. BTFI on SAM
Detectors
ISB
iBTF
SAM
IFI wheel
Space envelope

4. SAM’s eye view
SAM’s upper plate

5. Detectors
BTFI
iBTF module
Handling gear
ISB
SAM

8. SAM @ SOAR HQ (La Serena)

9. iBTF module (as built) z-stage VPHG1 VPHG2 with 40mm D-Gs
2-by-2 mosaic

10. iBTF – 3 axes motors (as built)
VPHG1
Rotation only
VPHG1
Rotation
Translation

11. iBTF LNA

12. iBTF Grating mount (as built)
D-G 2-by-2 mosaic (Ondax) on substrate
Grating holder (individual)
Grating mount
(adjustable in roll)

13. IFI “filter” wheel – remotely operable (for IFs, B-B filters & masks)
6-position
(in beam)
Filter exchange
position

14. IFI retraction & filter replacement

15. FPI exchange mechanism
FPP
module
Rails
FPI
dummy

16. IFP Filter wheel – remotely operable (for IFs & “Mexican” 4-way prism)
IFs tilts up to <12
4 Ifs
+ Clear
+ “Mexican Hat”

17. IFP filter wheel module
Module hinged to allow for manual filter exchange
Drive mechanism

18. FPP exchange mechanism
Rails
FPP
module
FPP withdrawal
mechanism
(manual)

19. FPP + IFP assembly

20. IFP filter exchange

21. CryoTiger dewar
Detector electronics
Detector head

22. (coincident with fibre outputs)
Flexure monitor system
f/16.5 baffles
f/16.5 beam
Field lens
Fibres from ISB
calibration system
Input focal surface
(coincident with fibre outputs)