Quick Answer: The Persistence of Vision Model STEM Lab spins double-sided 100 mm picture discs, such as a bird and a cage, on a hand-cranked pulley and belt drive so that the two images blend into one. It stands on an alloy base and measures 250 mm x 150 mm x 300 mm.
Last updated: October 2026
Key Features
Double-sided, 100 mm diameter laminated picture discs
Discs supplied: Bird in the Cage, Fish in the Bowl, and blank discs for students’ own designs
Manual pulley and drive-belt mechanism for smooth speeding up
Metal clamping slot on the rotating axle
Alloy base with mounting tower; about 1.2 kilograms
Technical Specifications
Specification
Value
Drive
Manual pulley and drive belt
Discs
Double-sided, 100 mm diameter
Base
Corrosion-resistant alloy with mounting tower
Weight
Approx. 1.2 kilograms
Dimensions
250 mm (L) x 150 mm (W) x 300 mm (H)
About This Product
Viewed still, each side of the disc shows its own picture; cranked slowly, the pictures flip back and forth in a jerky way, and above a certain speed they merge so that the bird appears inside the cage. Letting the wheel run down and noting when the illusion breaks helps students connect retinal persistence with the frame rates used in film, animation and screens, and the blank discs let them test their own image pairs.
Frequently Asked Questions
Which picture discs come with the Persistence of Vision Model STEM Lab?
Bird in the Cage and Fish in the Bowl discs, along with blank discs for making new image pairs.
.png)
.png)
.png)
