Download presentation

Presentation is loading. Please wait.

Published byJulia Crews Modified over 3 years ago

1
Data Reduction of Hartmann Test Ou Yang, Hsien Supervisor : Shiang-yu Wang

2
Data Reduction of Hartmann Test Introduction to Hartmann method Hartmann Pattern Data reduction Results & Discussion

3
Hartmann method Image quality examination method by detecting wavefront deviation w at certain points. The image aberration can be reconstruct by the data reduction.

4
Hartmann pattern diameter of the hole : 1cm distance between two holes : 4 cm # of holes : 140 The mask was installed in front of the secondary mirror of the TAOS#1 telescope

5
The Hartmann test image Inside focusOutside focusTilted image

6
Transverse aberrations for each of the data points on the telescope mirror

9
Aberration Polynomial for Primary Aberration where –A = spherical aberration coefficient –B = coma coefficient –C = astigmatism coefficient –D = defocusing coefficient –E = tile about x axis –F = tile about y axis

10
The coefficient of aberration polynomial CoefficientOutside focus Inside focusTilted image A3.585E-143.183E-12-8.457E-13 B4.844E-12-4.493E-11-9.942E-9 C-1.883E-81.025E-65.783E-7 D-7.566E-7-1.342E-11-1.589E-6 E-5.701E-5-3.293E-42.045E-2 F3.464E-4-2.38E-43.148E-4

11
The graph of W(x,y) [Outside focus] peak to valley error 11µm

12
The graph of W(x,y) [Inside focus] peak to valley error 6.8µm

13
The graph of W(x,y) [ Tilted image] peak to valley error 63µm

14
The graph of W(x,y) [spherical aberration coefficient] peak to valley error 21µm

15
The graph of W(x,y)[coma coefficient] peak to valley error 1.2µm

16
The graph of W(x,y)[astigmatism coefficient] peak to valley error 1.3µm

17
The graph of W(x,y) [defocusing coefficient] peak to valley error 17µm

18
The graph of W(x,y) [tilt about x axis] peak to valley error 5.6µm

19
The graph of W(x,y) [tilt about y axis] peak to valley error 3.4µm

20
summary The aberration of the optical system can be obtained by the hartmann test. The hartmann test can help the alignment sequence of optical systems. More detailed aberration terms can be obtained by the same procedure.

Similar presentations

OK

MCAO Laser Launch Telescope and Periscope Celine d’Orgeville and Jim Catone.

MCAO Laser Launch Telescope and Periscope Celine d’Orgeville and Jim Catone.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on teamviewer Ppt on sustainable tourism practices Dynamic scattering liquid crystal display ppt online Ppt on seven segment display alphabet Ppt on networking related topics such Uses of plants for kids ppt on batteries Ppt on taj lands end Converter pub to ppt online ticket Ppt on atrial septal defect secundum Ppt on programmable logic array diagram