Lab #1 - Geometric Optics

Lab #1 - Light and Optics

The next step is to try and get a handle on more of the behaviors that light can exhibit. To do this, I'm going to ask you to go take a look at the exercises described in Lab #1 at the following link:

https://drive.google.com/file/d/1WXTseRsX24tXQcKq03ZqWHXq7IqGIuTt/view

This will take you to a PDF document describing a series of things to try doing what a few different materials that I hope you may be able to scare up in one form or another. If you need help finding some of these, I recommend visiting https://laserclassroom.com and checking out their selection of light sources, lenses, and prisms.

Once you have what you need, try making some of the observations described in the lab exercise to see what light can do in different circumstances. The next post will be about describing what we see, so even if you can't do the exercises on your own, you can keep reading to find out what we learn from playing around with light this way.

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Lab #4 - Observing retinal inhomgeneities

Lab #4 - Observing retinal inhomgeneities Back-to-back lab activities, but there's a method to the madness: In this set of exercises, you'll make a series of observations designed to show off how your ability to see depends on which part of your retina you're trying to see with. Here's a link to the lab document: https://drive.google.com/file/d/1VwIY1bDNF4CI4CUVaY5WSvQ0HxF9Mn6Y/view When you're done here, we're ready to start saying more about the retina and how it works. Our next posts will be all about developing a model that we can use to describe the retina's contribution to your vision quantitatively, so get ready to calculate some stuff!

Lab #3 - Photopigments

Lab #3 - Photopigments Our next task is to work out how you translate the image formed in the back of a pinhole camera into some kind of signal that your nervous system can work with. We'll start addressing this question by examining photopigments in Lab #3. To complete this lab, you'll need access to some sunprint paper, which is available from a variety of different sources. Here's where I bought mine: http://www.sunprints.org . You can find the lab documents at the link below: https://drive.google.com/file/d/17MVZqvyiCRdT_Qu5n_CtK3rVcUP0zoOG/view When you're done, move on to the Lab #4 post to make a few more observations that will give us a little more information about the retina. Afterwards, we'll try to put all of this together into a more comprehensive description of what's happening at the back of the eye.

Color Constancy: Intro

Color Constancy: Estimating object and surface color from the data. In our last post, we introduced a new kind of computation that we said was supposed to help us achieve something called perceptual constancy . That term referred to the ability to maintain some kind of constant response despite a pattern of light that was changing. For example, complex cells in V1 might be able to continue responding the same way to a line or edge that was at different positions in the visual field. This would mean that even when an object changed position over time because you or the object were moving, your complex cells might be able to keep doing the same thing throughout that movement. This is a useful thing to be able to do because your visual world changes a lot as time passes, but in terms of the real objects and surfaces that you’re looking at, the world is pretty stable. Think about it: If you just move your eyes around the room you’re sitting in, your eyes will get very different pattern...

Seeing and Perceiving

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