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Weekly Report. Speaker: 陳琮夫 Advisor: 梁肇文 老師 Date:20130320. Lensarray Calibration. Image of autocollimator PS: This pic is error !!! We align the reflection image to the ghost image. Lensarray Calibration. The convex surface of lensarray the beam normal insert to the lensarray.
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Weekly Report Speaker:陳琮夫 Advisor:梁肇文 老師 Date:20130320
Lensarray Calibration Image of autocollimatorPS: This pic is error !!! We align the reflection image to the ghost image
Lensarray Calibration The convex surface of lensarray the beam normal insert to the lensarray
Advisor • 確認中間偏暗十字是否為 reference還是 ghost image • 確認正射下 nomal reflection error (未回答道問題)
Weekly Report Speaker:陳琮夫 Advisor:梁肇文 老師 Date:20130327
Outline • Calibration the lensarray and CCD protecting glassNext : use the least square fitting to calibrate
Calibration the lensarray and CCD autocollimator CCD The beam from autocollimator normal reflect to the protect glass above the ccd sensor
Calibration the lensarray and CCD autocollimator CCD lensarray The beam from autocollimator normal reflect to the lensarray in front of the ccd sensor . PS: Here we adjust the cross image to match the center of ccd
autocollimator CCD • Calibration the lensarray and CCD lensarray snap Without the pinhole With the 50um pinhole
light • Calibration the lensarray and CCD sensor lensarray glass PS: First, align the autocollimator and ccd glass. Secondly, place the lensarray. Lensarray is not parallel to the glass
- 0.00001578 (rad) = - 0.054 arcmin 0.00003813 (rad) = 0.131 arcmin • Calibration the lensarray and CCD ERROR 俯視 側視
0.00002166 (rad) = 0.07447 arcmin 0.0000226 (rad) = 0.07769 arcmin • Calibration the lensarray and CCD ERROR 俯視 側視
Weekly Report Speaker:陳琮夫 Advisor:梁肇文 老師 Date:20130403
5.376 arcmin arcmin • Calibration the lensarray and CCD 俯視 側視
Calibration the lensarray and CCD ? lensarray CCD
Align CCD&Lensarray • Flow chart Catch the picture Get the x,y coordinate Calibration: Misalignment effect Stick !!!! Place the testing lens Catch the picture Asign the ShackHartmann pattern Centroid Calibration Wavefront Reconstruction
histogram Saturation points Exposure time Gain
histogram Centroid
histogram !!! 不直接用function preview
Weekly Report Speaker:陳琮夫 Advisor:梁肇文 老師 Date:20130410
Calibration the lensarray and CCD 將 lensarray 黏上 CCD 之後角度變化11.15 arcmin arcmin
Calibration the lensarray and CCD =( sin(dx)cos(dy), sin(dy), cos(dx)cos(dy) ) y dθx dθy z x
Calibration the lensarray and CCD y x’ x y’ dθy dθx
Calibration the lensarray and CCD • Find the x and y • Shift the centroid to the CCD center
Calibration the lensarray and CCD • Find the x and y • Shift the centroid to the CCD center • Calibration the tilt angle -> too small !!!!
Calibration the lensarray and CCD X direction y direction
Weekly Report Speaker:陳琮夫 Advisor:梁肇文 老師 Date:20130417
Align CCD&Lensarray • Flow chart Catch the picture Get the x,y coordinate Calibration: Misalignment effect Calibration: Defocus effect Place the testing lens Stick !!!! Catch the picture Asign the ShackHartmann pattern Centroid Calibration: Oddaberration Wavefront Reconstruction
Calibration the lensarray and CCD • Tilt angle of the LensArray • The maximum pixel shift • Wavefront slope error ; pixel size = 0.044 mm
Calibration the lensarray and CCD Rotate it more than 1.5 degree , using central area to analysis
Calibration the lensarray and CCD 取所有點的平均 之後做 least-square fitting where ,
Calibration the lensarray and CCD • Method 1. W.D. = spot shift/tan(∆𝜃); Ave_W.D.=4269.560 μm • Method 2. WD(x) = fitted_f(x) / x Working distance
Weekly Report Speaker:陳琮夫 Advisor:梁肇文 老師 Date:20130426
polynomial function Hc(on focus) Hc(defocus) θ θ Δf EFL NOtE : polynomial function : where , φ=(tanθ) Hc(On focus) = (EFL+ ++ Hc (defocus) = ((EFL-Δf)+ + + Paraxial height
Defocus effect on CodeV simulation Pixels tan(θ) (1174-982)*4.4=846.106 um = 0.846mm (1174-719)*4.4=1999.827 um = 2.000 mm
Defocus effect on experiment Pixels tan(θ)
Defocus effect on CodeVsimulation and experiment Pixels tan(θ)
Defocus effect on CodeVsimulation and experiment Pixels tan(θ)
Defocus effect on CodeVsimulation and experiment Pixels tan(θ)
Weekly Report Speaker:陳琮夫 Advisor:梁肇文 老師 Date:20130508