Quantity   Component name
1 × RaspberryPi Zero W Any Pi works as long as it accesses the camera
1 × PiCamera
1 × 8020 Aluminum Extruded Rail Including hardware (nuts and bolts)
1 × 1.0 Diopter Welding Magnifying Lens Other focal lengths give different results
1 × 1000 lines/mm holographic grating A cardboard grating cards
1 × Double convex lens A short focal length (28 mm) is necessary.
1 × Laser diode A typical red one. Lens gets taken off.
1 × Arduino + Power circuitry There are many ways with varying levels of complexity to power a laser.
1 × Plywood for laser cutting Laser cut parts hold the components
1 × Cardboard for laser cutting