Brain Factory

Learn About Pulfrich 3D

Pulfrich 3D is probably the least known of all the 3D formats. Yet, Pulfrich has the benefit of also being enjoyable in 2D (without 3D glasses) and has been used successfully, if infrequently, for both TV and video games.

The most notable Pulfrich 3D productions include Shark Week 2000 (Discovery Channel), a number of The Rolling Stones music videos, a Dutch tourism promo series, a 1997 episode of 3rd Rock from the Sun, Orb-3D (Nintendo) and Jim Power: The Lost Dimension in 3D (Super Nintendo).

Pulfrich 3D works because the visual cortex responds faster to brighter images (and slower to darker ones). The phenomenon is named after Carl Pulfrich, who discovered it in 1922.

The Pulfrich 3D effect depends on continuous lateral (side-to-side) motion of an image. The need for smooth, continuous movement creates obvious challenges for Pulfrich production.

Pulfrich glasses have one clear eye and one dark (gray) eye. As objects travel 1st past the clear lens and then past the dark lens, the difference in lens illumination extends the brain's response time. The delay and difference between images is perceived as depth and objects appear to move closer. When the reverse motion occurs, the difference in lenses shortens the response time - and objects appear to move away.

Experience Pulfrich 3D - from your friends at The Brain Factory.
Create Pulfrich 3D - with your friends at The Brain Factory.

The technical demands of Pulfrich production require expertise, creativity and artistry to create the illusion of no limitations. Contact The Brain Factory to brainstorm how to get the most out of your 3D project.

Learn About Anaglyph 3D
Learn About Lenticulars
Learn About Side-by-Side Stereo Pair 3D
Learn About Chromadepth 3D