what is the technical term for this type of effect?

beige — Wed, 04 Feb 2009 19:42:05 -0800

what is the technical term for this type of effect? I'm trying to locate a blog entry that i saw some months ago which featured architectural/landscape elements in which the perceived image changed depending on the visual angle from which you looked at it.

The concept is basically using a prismatic surface and applying strips from various images to the surfaces facing different direction - like the cards you used to (maybe still do) get in cereal packets where the image changes as you move it relative to your view.

I can't recall the specific name for this effect. Any suggestions?

Flourescent strips, pulsing lights and a chiller cabinet.

twine42 — Fri, 28 May 2004 05:43:34 -0800

A random question involving fluorescent strips, pulsing lights and possibly a chiller cabinet. [MI] Last night I spent some time watching a chilled cola vending machine. It had a glass front and a pair of strip lights inside the case.

Every now and then I was aware of the noise of a fan running with a pulsing speed at about 2 - 3 Hz. Whenever it happened I was aware of a strange pulsing of light down the tubes. 'Dark' spots of light were being created on each audible pulse and then flowed down the tube to be sucked back in at the other end in perfect syncronisation with the creation.

The pulses of 'light' and 'dark' were apparently the same size and travelled quite slowly. There were probably about 30 bands down a four foot tube. I'd guess that the air inside the vender was in the 2-6 celcius area.

To make things worse, I'm not 100% convinced that the sounds wasn't coming from a coffee vending machine on the opposite side of the room.

What the hell was going on?

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what is the technical term for this type of effect?

Flourescent strips, pulsing lights and a chiller cabinet.