PROPixx
Does VPixx manufacture projection screens?
Yes! We manufacture a variety of screen sizes and shapes for tabletop, standalone and in-bore use.
All of our screens use a solid plastic frame with a thin, flexible screen material that minimizes internal reflections. We have different materials optimized for front- or rear-projection, and 2D or 3D stimuli. Our screens use aluminum bases and are safe for use in MRI, MEG and other ferromagnetically sensitive environments.
We do not offer hard acrylic screens or roll-up screens.
What is the difference between a 2D and a 3D projection screen?
Screen material optimized for 3D projection has a silver/grey coating that preserves the clockwise and anticlockwise polarization of light for left- and right-eye images. This coating has a high peak luminance gain that drops off rapidly with increasing viewing angles. In comparison, screen material optimized for 2D projection has moderate luminance gain and a more uniform luminance profile. In practice, when viewed directly, screens optimized for 3D will appear brighter but less uniform than screens optimized for 2D. However, when used with a 3D polarizer and passive filter glasses, the perceived brightness of images projected on a screen optimized for 3D is reduced significantly compared to a 2D screen due to the relatively low transmittance of the polarizer and the on-off nature of alternate frame sequencing.
For front projection, we stock a ‘5D’ screen material, a good all-in-one compromise between 2D- and 3D-optimized screen materials.
For rear projection, researchers must choose between 2D and 3D optimized screen materials. Showing 2D images on a 3D screen is possible, especially on smaller screens. However, 2D material will scatter 3D polarization and is incompatible with 3D stimulus presentation with a polarizer.
Can I use a SHIELDPixx with a third-party projector?
The SHIELDPixx MRI shielding enclosure is designed specifically for in-room installations with the PROPixx MRI-safe projector. It is not sold as an independent unit and cannot be used with third-party projection systems.
What is the gamma of the PROPixx?
The PROPixx uses DLP technology, which has an inherently linear gamma of 1.
My current PROPixx lens doesn’t work with my new research space. Can I change lenses?
Yes! If you are moving labs, or changing your testing layout, and your current lens does not support the distance/size requirements of the new space, you can purchase a new lens and install it on your current projector. Along with the new lens, we will provide you with instructions on how to swap your lenses out. The process takes less than 15 minutes.
Please note, we do not accept used or returned lenses.
Not sure what lens you need? You can check out our guide to PROPixx Projection Geometry and System Configuration , or contact our scientist team at scientist@vpixx.com.
What is the lifespan of the PROPixx light source? Is it possible to replace it?
The PROPixx uses RGB LED light sources with a lifetime of approximately 60,000 hours. Even with heavy use, this light source should last decades.
In the event the light source exceeds its lifetime and must be replaced, the unit can be shipped to VPixx Technologies for disassembly, LED chip replacement, and full factory calibration. If you require this service, please contact our technical support team (support@vpixx.com) for more details and a quote for the LED replacement costs.
I’d like to mount the PROPixx on a ceiling or wall bracket. Do you have recommendations?
We do not have specific recommendations for mounting brackets for the PROPixx. The PROPixx has three M4 mounting holes with a 0.7 mm pitch on the base for bolting the device to a ceiling or wall plate. Please see page 13 of the PROPixx user manual for spacing (measurements are in inches).
The PROPixx weighs roughly 15 kg (33 lbs). Please ensure your mounting solution is capable of supporting this weight before installing your PROPixx.
Once mounted, the PROPixx can be set to “ceiling mount” in PyPixx to invert the display.