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Fresnel Diffractive Arrays Imagery

Sky observation Targets

Presented by Truswin Raksasataya

Agenda

• Sky validation and its objectives• FDAI Gen II configurations• FDAI Gen II Estimation• First Results• Future Targets

Sky observation for Prototype II

• To test Fresnel Imagery with real astrophysical objects.

• To validate the performance of Fresnel Imagery with the ground support of 20 meter long focal

• To test the operation on field usages.

What’s changes Prototype Gen II and Current state Version 1.5.1 What’s change

But.. Effective area is approximately the same as Prototype 1,

Chromatic Correction

Recent Results from Sky observation

• FDAI 1.5.1

No Tilt tip compensation for atmosphere turbulance

Estimation of Fresnel Dynamic Range

First Results from Sky observationFresnel Imagery version 1.5.1 during transferred state:

Single StarsVega :Magnitude: 0


• Single Star : Deneb• Magintude: 1

From FDAI 1.5.1


Epsilon Lyr-----------------------------------• Epsilon 1 AB

Magnitude : 1 Separation 2.6 arcsec

• Epsilon 2 ABMagnitude : 1 Separation 2.3 arcsec


• STT 433 : (Upsilon Cyg)Mag(Separation,arcsec): 4.4, 10(15”), 9,9(21”)

STT 433 C

STT 433 B

STT 433 A


• STF 2767• Magnitude: 4.2, 8.7• Separation: 6 arcsec

B

A


Results form Ground validation from FDAI 1.5.1

Epsilon Lyr 1 AB

Epsilon Lyr 2 AB

STT 433

STF 2767

Future Targets

• High Dynamic Ranges Targets : Binary systemsDouble Stars: Sirius AB , Procyon AB , AGC

9AB etc.• Extended Fields: Solar system objects

Mars and its satellites : High Resolution image , separation of its satellites.

Pluton and Charon: Challenge!

Future Targets• Double Stars

Procyon AB

SiriusAB

BUP 9AB

BU 633AB

AGC 9AB

Xi Peg

Future Targets

• Solar system objects • Mars and its Satellites

THANK YOU FOR YOU ATTENTIONANY QUESTIONS ARE WELCOMET