I “accidentally” ended up with the lenses of some 3d glasses I used to watch Gravity (amazing movie, by the way). They are glass-made and have a reflective coating. Is there anything I could do with them? Any nice projects? They are quite thick and seem to be well-made.
It is funny… 3d does not work so much for me, but it does, in the end. When I was younger (waaaaaay younger, 7 years old) I had crossed eyes (In Brazil we say that the person has one eye on the fish and another one on the cat). So… 3d shouldnt work for me, but I have a really good sense of depth with the glasses. I actually grabbed myself to the chair sometimes and felt quite dizzy because of the images. It is a pitty the screen was too small. Anyway…
So, questions: Is there anything I can do with those lenses?
Which curious nicknames and expressions have you heard for crossed eyes?
Did you enjoy Gravity?
What is your favourite subway sandwich?
It was Real3D. For the price I paid I thought I would get IMAX. I might watch it again.
I like the privacy glasses. I actually have an old lcd monitor. Cool.
OK, the RealD glasses are the more interesting ones, so that’s good. The lenses have a distinct front side and back side. Basically, they act like a circular polarizer on the front side but a linear polarizer on the back side.
If you look through one lens alone at any non-polarized source, it’ll look half as bright as without the lens.
If you put two of the same lens together front-to-front, it’ll be black, no matter which way you turn them.
If you put two opposite lenses together front-to-front, it’ll be the same brightness as with a single lens.
If you put any two lenses together back-to-back, then the brightness will depend on the orientation: It’ll vary from completely black, to the same as a single lens, as you rotate them relative to each other.
If you put any two lenses together back-to-front, then the brightness will be one quarter of normal, or half that of a single lens.
For a simple experiment that you can do with a single pair, without disassembling them, put them on and look in a mirror. Close one eye, and you’ll see the closed eye in the reflection, looking like it has a perfectly clear lens in front of it, but the open eye will be completely blacked out.
Another experiment you can do with a single pair and an LCD screen: If you wear the glasses normally, the screen will look a bit dimmer but otherwise normal. If you look through the glasses backwards, though, and tilt your head from side to side, you’ll see the screen black out at one angle, and appear normal (not dimmed at all) from another.