TravisAllen747 - Revision history

imported>Joyce: /* Appendix */

2017-12-19T04:02:13Z

Appendix

← Older revision		Revision as of 04:02, 19 December 2017
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	# This is a zip file containing the edited macro, the tutorial script, and the edited ISET rt scripts:		# This is a zip file containing the edited macro, the tutorial script, and the edited ISET rt scripts:
	#* [[File:PSYCH221_Final_Uploaded_Files.zip]]		#* [[File:PSYCH221_Final_Uploaded_Files.zip]]
	~~# This is a link to a location with the optics imported for the AB0618MG lens (.mat):~~
	~~#* https://drive.google.com/drive/folders/1QDla2nS7uQTbFkrCKz8CxANqjd1RO9cC?usp=sharing~~

imported>Student2017: /* Appendix */

2017-12-15T20:28:16Z

Appendix

← Older revision		Revision as of 20:28, 15 December 2017
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	# This is a PDF of the final presentation I gave:		# This is a PDF of the final presentation I gave:
	#* [[File:PSYCH221_ProjectPresentation_TravisAllen_12DEC2017.pdf]]		#* [[File:PSYCH221_ProjectPresentation_TravisAllen_12DEC2017.pdf]]
	# This is a zip file containing the edited macro, the tutorial script~~, the optics imported for the AB0618MG lens~~, and the edited ISET rt scripts:		# This is a zip file containing the edited macro, the tutorial script, and the edited ISET rt scripts:
	#* [[File:PSYCH221_Final_Uploaded_Files.zip]]		#* [[File:PSYCH221_Final_Uploaded_Files.zip]]
			# This is a link to a location with the optics imported for the AB0618MG lens (.mat):
			#* https://drive.google.com/drive/folders/1QDla2nS7uQTbFkrCKz8CxANqjd1RO9cC?usp=sharing

imported>Student2017: /* Appendix */

2017-12-15T20:08:26Z

Appendix

← Older revision		Revision as of 20:08, 15 December 2017
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	The following is a list of relevant project files:		The following is a list of relevant project files:
	# This is a PDF of the final presentation I gave:		# This is a PDF of the final presentation I gave:
	** [[File:PSYCH221_ProjectPresentation_TravisAllen_12DEC2017.pdf]]		#* [[File:PSYCH221_ProjectPresentation_TravisAllen_12DEC2017.pdf]]
	# This is a zip file containing the edited macro, the tutorial script, the optics imported for the AB0618MG lens, and the edited ISET rt scripts:		# This is a zip file containing the edited macro, the tutorial script, the optics imported for the AB0618MG lens, and the edited ISET rt scripts:
	** [[File:PSYCH221_Final_Uploaded_Files.zip]]		#* [[File:PSYCH221_Final_Uploaded_Files.zip]]

imported>Student2017: /* Appendix */

2017-12-15T20:07:59Z

Appendix

← Older revision		Revision as of 20:07, 15 December 2017
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	== Appendix ==		== Appendix ==
	The following is a list of relevant project files:		The following is a list of relevant project files:
	~~# [[File:PSYCH221_ProjectPresentation_TravisAllen_12DEC2017.pdf]]~~		# This is a PDF of the final presentation I gave:
	## This is a PDF of the final presentation I gave		** [[File:PSYCH221_ProjectPresentation_TravisAllen_12DEC2017.pdf]]
	# [[File:~~PSYCH221_Final_Uploaded_Files~~.~~zip~~]]		# This is a zip file containing the edited macro, the tutorial script, the optics imported for the AB0618MG lens, and the edited ISET rt scripts:
	## This is a zip file containing the edited macro, the tutorial script, and the edited ISET rt scripts		** [[File:PSYCH221_Final_Uploaded_Files.zip]]

imported>Student2017: /* Appendix */

2017-12-15T19:58:20Z

Appendix

← Older revision		Revision as of 19:58, 15 December 2017
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	== Appendix ==		== Appendix ==
	The following is a list of relevant project files:		The following is a list of relevant project files:
	# [[File:PSYCH221_ProjectPresentation_TravisAllen_12DEC2017.pdf~~\|Final Project Presentation~~]]		# [[File:PSYCH221_ProjectPresentation_TravisAllen_12DEC2017.pdf]]
	## This is a PDF of the final presentation I gave		## This is a PDF of the final presentation I gave
	#		# [[File:PSYCH221_Final_Uploaded_Files.zip]]
			## This is a zip file containing the edited macro, the tutorial script, and the edited ISET rt scripts

imported>Student2017: /* Appendix */

2017-12-15T19:52:32Z

Appendix

← Older revision		Revision as of 19:52, 15 December 2017
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	== Appendix ==		== Appendix ==
	The following is a list of relevant project files:		The following is a list of relevant project files:
	# [[File:PSYCH221_ProjectPresentation_TravisAllen_12DEC2017.pdf]]		# [[File:PSYCH221_ProjectPresentation_TravisAllen_12DEC2017.pdf\|Final Project Presentation]]
	## This is a PDF of the final presentation I gave		## This is a PDF of the final presentation I gave
	#		#

imported>Student2017: /* Appendix */

2017-12-15T19:52:16Z

Appendix

← Older revision		Revision as of 19:52, 15 December 2017
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	== Appendix ==		== Appendix ==
			The following is a list of relevant project files:
	~~You can write math equations as follows:~~		# [[File:PSYCH221_ProjectPresentation_TravisAllen_12DEC2017.pdf]]
	~~<math>y = x + 5 </math>~~		## This is a PDF of the final presentation I gave
			#
	~~You can include images as follows (you will need to upload the image first using the toolbox on the left bar.)~~:
	[[File:~~Screen_Shot_2016-11-29_at_7.05~~.~~37_PM.png\|200px~~]]

imported>Student2017: /* Introduction */

2017-12-15T19:47:16Z

Introduction

← Older revision		Revision as of 19:47, 15 December 2017
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	== Introduction ==		== Introduction ==
	For my course project, I wanted to learn more about the Image Systems Evaluation Toolbox (ISET) while incorporating some of my experience with optics and an optical design program known as Zemax OpticStudio. Several years ago (potentially 10-12 years ago), others had developed a basic capability for bringing lens parameters, as defined in Zemax, into ISET for use as "raytrace optics". The current implementation is pretty straightforward, but it is a bit dated. When this method was originally implemented, there was no inherent interoperability between Opticstudio and Matlab (the programming software that runs ISET). Now, in 2017, OpticStudio has options for interfacing with several external programs, including Matlab.		For my course project, I wanted to learn more about the Image Systems Evaluation Toolbox (ISET) while incorporating some of my experience with optics and an optical design program known as Zemax OpticStudio. Professors Wandell and Farrell, as well as the course TA Trisha Lian, all suggested I focus my project on the area where these two software packages currently overlap.

			Several years ago (potentially 10-12 years ago), others had developed a basic capability for bringing lens parameters, as defined in Zemax, into ISET for use as "raytrace optics". The current implementation is pretty straightforward, but it is a bit dated. When this method was originally implemented, there was no inherent interoperability between Opticstudio and Matlab (the programming software that runs ISET). Now, in 2017, OpticStudio has options for interfacing with several external programs, including Matlab.

	Since I was working alone and fairly unfamiliar with both ISET and the current method for interfacing with Opticstudio, my project began with the primary goal of taking a lens system in Zemax Opticstudio and importing it into ISET using the old method. Since the scripts that did this had not been used by anyone in quite some time, my plan was to work through each part of the process and fix anything that didn't work and clean up code that was unnecessary. My hope was to learn more about both ISET and Zemax OpticStudio along the way.		Since I was working alone and fairly unfamiliar with both ISET and the current method for interfacing with Opticstudio, my project began with the primary goal of taking a lens system in Zemax Opticstudio and importing it into ISET using the old method. Since the scripts that did this had not been used by anyone in quite some time, my plan was to work through each part of the process and fix anything that didn't work and clean up code that was unnecessary. My hope was to learn more about both ISET and Zemax OpticStudio along the way.

imported>Student2017: /* Conclusions */

2017-12-15T19:45:21Z

Conclusions

← Older revision		Revision as of 19:45, 15 December 2017
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	For the second (stretch) goal for this project, I was not able to make any substantive progress on updating the method for interpolation of the PSF's for ISET's optics modeling process. It appears the the code that would need to be understood and modified is found in rtPrecomputePSFApply.m.		For the second (stretch) goal for this project, I was not able to make any substantive progress on updating the method for interpolation of the PSF's for ISET's optics modeling process. It appears the the code that would need to be understood and modified is found in rtPrecomputePSFApply.m.

	== Conclusions ==		== Conclusions / Next Steps ==
			While doing this project, I learned a lot about how both Zemax OpticStudio and ISET work. I am more confident working with both tools and excited to work with them more in the future. While I was unable to do much beyond just get the capability back to where it was 12 years ago, I do believe that there is a lot of potential for this capability in the future.

			As far as I can tell, there is now a decent, inherent capability to transfer data between Zemax OpticStudio and Matlab. If one were to dedicate some time to this endeavor, I believe the old macro export / script import method could eventually be done away with. However, many of the raytrace scripts in ISET are expecting specific kinds of input. So the ISET raytrace script ecosystem would likely need to be overhauled. While this may be more work, I think there may be some great benefits to doing this in the future.

			Another area ripe for additional exploration is the tradeoff between the field of view (FOV) and scene sampling (scene resolution). As mentioned in the results section, this is an area where I'm sure additional work could be done to better understand what's happening and what settings might be optimal for a raytrace optics model.

			In addition to looking at the FOV vs. Scene Resolution tradeoff, it might be a good idea to go back and look at how the geometric distortion is being calculated and used. After looking at the Zemax macro, it looks to me as if it assumes radial symmetry for the lens system. While this may be the case for many lenses, it's certainly not true for all of them. Might be something work looking at closer.

			And lastly, while I did not get a chance to fully explore changing the method for PSF interpolation, I definitely see the merit in someone going and taking a closer look at this problem. I know Zemax does this exact scene simulation in OpticStudio, so it might be worth it for a future project to have someone go in and try a few different methods, show the comparisons between these methods, and also do some comparisons with the Zemax OpticStudio method. These were suggestions by Professor Wandell and Trisha that I believe have a lot of merit and I wish I had been able to pursue myself.

			At the end of the day, I learned a lot, enjoyed tinkering around with all of the code, and hope that my contributions to the code base can be used for some good in the future.

	== Appendix ==		== Appendix ==

imported>Student2017: /* Results */

2017-12-15T19:34:09Z

Results

← Older revision		Revision as of 19:34, 15 December 2017
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	[[File:~~ISETScene~~.PNG\|thumb\|center\|500px\|Figure 7: The ISET Scene Window Showing the Scene Radiance]]		[[File:ISET_Scene.PNG\|thumb\|center\|500px\|Figure 7: The ISET Scene Window Showing the Scene Radiance]]

	After creating the scene, I computed an optics object using the imported raytrace data from Zemax OpticStudio and displayed the simulated irradiance (see Figure 8).		After creating the scene, I computed an optics object using the imported raytrace data from Zemax OpticStudio and displayed the simulated irradiance (see Figure 8).

	[[File:~~ISETOptics~~.PNG\|thumb\|center\|500px\|Figure 8: The ISET Optics Window Showing the Interpreted Irradiance Through the Optics]]		[[File:ISET_Optics.PNG\|thumb\|center\|500px\|Figure 8: The ISET Optics Window Showing the Interpreted Irradiance Through the Optics]]

	One might notice that I used a pretty high FOV for the scene (20.0 degrees). This is because the greater the FOV, the more of the sampled field heights I would use for the PSF interpolation. The tradeoff is that a higher FOV means fewer PSF samples per scene resolution. Thus, the resolution of the scene had to be increased in order to get an acceptable spatial sample rate for the PSFs. However, with a higher sample rate came greater computational load (and greater compute times). This is a trade-off that I've come to appreciate and that I believe could be looked at closer by someone in the future.		One might notice that I used a pretty high FOV for the scene (20.0 degrees). This is because the greater the FOV, the more of the sampled field heights I would use for the PSF interpolation. The tradeoff is that a higher FOV means fewer PSF samples per scene resolution. Thus, the resolution of the scene had to be increased in order to get an acceptable spatial sample rate for the PSFs. However, with a higher sample rate came greater computational load (and greater compute times). This is a trade-off that I've come to appreciate and that I believe could be looked at closer by someone in the future in order to find a more optimal balance.

			For the second (stretch) goal for this project, I was not able to make any substantive progress on updating the method for interpolation of the PSF's for ISET's optics modeling process. It appears the the code that would need to be understood and modified is found in rtPrecomputePSFApply.m.

	== Conclusions ==		== Conclusions ==