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Originally Posted by GAHD
I'd just bend the disks with a nut, bolt and washer arragement; that lets you keep adjusting each disk independantly. If they're mounted in circular holes, the flex should be self-correcting and uniform. No heating requred.
The final product looks pritty cool man! Can't wait to hear how it works.
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While bending with a nut/bolt might curve the disk, it likely won't make it a parabola. On the other hand even an array of flat mirrors is capable of arrangements reflecting to a common focus.
I didn't know how low-to-go on the algebra of the parabola. The equation is basic analytic geometry. In terms of the optics, only the parabolic curve reflects every incoming ray to the same point, called the Focus. By all means ask for more clarification if necessary on this.
Cloudy & rainy today again so no test; just as well as the modem went kaflooy today.

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semantics is not always just pedantic quibbling. ~ douglas r. hofstadter