mechanical iris

[Johnny Pneumatic]

I'm looking for a mechanical iris 50cm in diameter.
I can't find one. Advice?

 

[Hamish]

What would you want a 50cm mechanical iris for?

I've only ever used the small ones as variable apertures for optics experiments. I can't imagine anyone making a 50cm one. What is the application?

 

[Johnny Pneumatic]

window cover

 

[EdipisReks]

they had one that big in Alien, so maybe you could ask your local movie set designer/art director.

 

[richardm]

Or you could make one.

 

[Goshawk]

Ideas for an irising door.

http://heyjim.pair.com/swirly/

 

[Johnny Pneumatic]

I found some larger ones; for stage lighting.
I'm still looking.

 

[Agammamon]

If you can't find a larger iris maybe a smaller window?

 

[Johnny Pneumatic]

Woo hoo, I found it

 

[geni]

I can't find anything on that page bigger than 5cm (50mm)

 

[Benguin]

Just scale up a design from a camera lens,

Not quite the same, but it should work

 

[Johnny Pneumatic]

I can't find anything on that page bigger than 5cm (50mm)

Try here its $468

 

[Johnny Pneumatic]

On a related note, can an iris be used as a variable sphincter for blowing smoke rings?

 

[sorgoth]

I was so confused until I clicked that link.

"Mechanical Iris? What? New technology? I don't understand!"

 

[Johnny Pneumatic]

On a related note, can an iris be used as a variable sphincter for blowing smoke rings?

There must be someone out on the forum who knows. Please tell me.

 

[kookbreaker]

Try here its $468

Hey! My parent company!

 

[kookbreaker]

There must be someone out on the forum who knows. Please tell me.

I don't see why not, but its kind of expensive tool for the job.

http://www.amasci.com/amateur/vortgen.html

http://iml.umkc.edu/physics/sps/projects/vortex/vortex.html

http://stevespanglerscience.com/product/1199

 

[Johnny Pneumatic]

I wasn't talking about using the $468 one. That would be expensive! I was thinking of using the 70mm stainless steel one on their site; find a way to computer controle the opening dia. and blow glycol vapor or fog from an ultrasonic water fogger out through it using a bass speaker to puff the vapor or fog out. All this stuff being hidden inside a container made from two stainless steel woks welded together to look like a giant M&M(tm). The rings would blow straight up out the top. This would be a project to do in a few years after I learn all this stuff.

 

[kookbreaker]

I wasn't talking about using the $468 one. That would be expensive! I was thinking of using the 70mm stainless steel one on their site; find a way to computer controle the opening dia. and blow glycol vapor or fog from an ultrasonic water fogger out through it using a bass speaker to puff the vapor or fog out. All this stuff being hidden inside a container made from two stainless steel woks welded together to look like a giant M&M(tm). The rings would blow straight up out the top. This would be a project to do in a few years after I learn all this stuff.

Even EO's smaller ones are more expensive compared to, say, a piece of cardboard with a hole cut in it.

 

[Johnny Pneumatic]

Even EO's smaller ones are more expensive compared to, say, a piece of cardboard with a hole cut in it.

But a piece of cardboard can't vary the ring size on the fly either. Water vapor would allow fungi to grow on it to.