Speaker: 陳琮夫 Advisor: 梁肇文老師 Date:20130320

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

Lensarray Calibration

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)

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

Calibration the lensarray and CCD

- 0.00001578 (rad) = - 0.054 arcmin 0.00003813 (rad) = 0.131 arcmin • Calibration the lensarray and CCD ERROR 俯視側視

Calibration the lensarray and CCD

0.00002166 (rad) = 0.07447 arcmin 0.0000226 (rad) = 0.07769 arcmin • Calibration the lensarray and CCD ERROR 俯視側視

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

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

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

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)

Speaker: 陳琮夫 Advisor: 梁肇文老師 Date:20130320