The one on the left is what I call a "Handheld
Interocitor", and is a sort of Geiger Counter for Nielsen Generator energy (don't ask). The one of the right is an energy scanner as carried by scientists.
The thing in between is a...Cricket Maser. yeah, that's what it is.
Both of the main props are greenscreen equipped so that VFX can be added. The prop on the right has working blinkies. The rubber-band is not part of the finished prop, futuristic as it looks.
The two props are made from found objects. The "Interocitor" is actually a Spy Gear Kids Satellite Listener.
Here's a pic of one unaltered.
The scanner is a
Beat Blenders gizmo, which I disassembled in order to put in custom interface art. I also removed the speaker cover and replaced it with the plastic end-cap of an art tube, allowing a flat area for the screen.
I found both of these at a place called Scrap in San Francisco. Total cost for the two devices: $1. The paint cost more than the props!
When making props like this I recommend basically picking up anything that has an interesting shape and seeing what you might make from it. Don't look for things that look like a tricorder or whatnot. The Beat Blender thing appealed to me precisely because the off-center speaker broke up the boxy shape. The Spy Gear thing just looked really cool when all folded up, and being triangular didn't look like anything else I could recall seeing as a prop.
Go through Goodwill type stores and just look at the toys and electronics. You can often find great shapes for practically nothing.
Just for giggles, here are some of the props we had on location.
The silvery material on the displays of the hand scanner (center bottom) and the dark stuff inside the "hand-held interociter" (upper left) are only there for shots when the devices are "off". They pop off to reveal greenscreen material beneath allowing us to superimpose readouts onto them.
Speaking of on-location, here's a shot of a landing party" prop used by Dr. Valerie Young in POLARIS. It was built from an electronic toy and modified to include a greenscreen element for VFX superimposition (a reflective surface was placed over the greenscreen when the device was "idle") and custom interface graphics.
This photo of the same prop was taken before final touchups to it. The rubber band holding the scanner disc in place was there while the cement dried.