palm-3000 optical bench update jenny roberts optical bench team: c. baranec, a. bouchez, k. bui, r....

PALM-3000 Optical Bench Update Jenny Roberts Optical Bench Team: C. Baranec, A. Bouchez, K. Bui, R. Burruss Team Meeting #15 10/29/2009

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PALM-3000

Optical Bench Update

Jenny RobertsOptical Bench Team: C. Baranec, A. Bouchez, K. Bui, R.

BurrussTeam Meeting #15

10/29/2009

PALM-3000Opto-mech Work

• Since last October, we have:– Completed the optical bench requirements– Completed the optical design for PALM3000– Passed PDR– Completed the majority of the mechanical

components – Procured most of the required optics– Completed acceptance testing of the 3388-DM at

Xinetics– Laid out the I&T testbed at Caltech

Page 3: PALM-3000 Optical Bench Update Jenny Roberts Optical Bench Team: C. Baranec, A. Bouchez, K. Bui, R. Burruss Team Meeting #15 10/29/2009

PALM-3000P3k Layout

Page 4: PALM-3000 Optical Bench Update Jenny Roberts Optical Bench Team: C. Baranec, A. Bouchez, K. Bui, R. Burruss Team Meeting #15 10/29/2009

PALM-3000Bench Mechanics

Newport mirror mounts with 6” mirror

FM1

FM2

• Optical mounts have been designed and manufactured

• OAP mounts and the bench enclosure still need to designed

Page 5: PALM-3000 Optical Bench Update Jenny Roberts Optical Bench Team: C. Baranec, A. Bouchez, K. Bui, R. Burruss Team Meeting #15 10/29/2009

PALM-3000HOWFS Mechanics

Direction of adjustment of mirror

Dire

ctio

n of

just

men

t of m

irror

Direction of adjustment

Of mirror

Newport XYZ stage

• HOWFS mechanical components are complete, including a cover not shown here

Adjustable Field Stop Assembly

Page 6: PALM-3000 Optical Bench Update Jenny Roberts Optical Bench Team: C. Baranec, A. Bouchez, K. Bui, R. Burruss Team Meeting #15 10/29/2009

PALM-3000DM3368 (HODM)

• DM is behind schedule with a current delivery expected in Nov 09

• The P3k DM team spent 3 weeks at Xinetics integrating the driver electronics, cabling and mirror for the 3388-actuator DM system.

• Mirror Results– We verified that all the actuators are connected and respond to bias

voltage

– We can actively control 3128 out of 3388 actuators and all of those respond to commands as expected*

– The full stroke is between 1um and 1.4um which meets our requirements

– The mirror surface had significant wavefront error (more than 2um P-V surface)

Page 7: PALM-3000 Optical Bench Update Jenny Roberts Optical Bench Team: C. Baranec, A. Bouchez, K. Bui, R. Burruss Team Meeting #15 10/29/2009

PALM-3000Repolish Status

• To remedy the large static surface errors, we decided to have Xinetics repolish the mirror before shipping it to us.

• The measured data still show the dimples but they are smaller by an order of magnitude

• Changes in humidity are a concern because they will cause the dimples to change

Page 8: PALM-3000 Optical Bench Update Jenny Roberts Optical Bench Team: C. Baranec, A. Bouchez, K. Bui, R. Burruss Team Meeting #15 10/29/2009

PALM-3000Expected Surface at Bias After Rework

• Repolishing was done in an unpowered state, so any error that is induced by bringing the mirror to bias will be present after repolishing as well

• This surface is within the control range of the actuators

Predicted control using measured influence functions

Page 9: PALM-3000 Optical Bench Update Jenny Roberts Optical Bench Team: C. Baranec, A. Bouchez, K. Bui, R. Burruss Team Meeting #15 10/29/2009

PALM-3000Schedule

• November– Testing HOWFS– Testing DM

• December– Testing HOWFS and DM in the testbed

• January– Testing HOWFS and DM with RTC

• February– Closed-loop control with RTC in testbed

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Documents

mirror surface

testing howfs testing

assembly slide

caltech slide

bench mechanics newport

mirror direction of

optical bench requirements

p3k layout slide