3D glasses and filters

Polarising glasses

Polarising glasses are used to view projected stereoscopic content.

Standard plastic glasses offer a lightweight rigid plastic frame (the temples do not fold) and a good combination of quality and economy. The polarizing glasses are the best choice when low cost, multiple use and large quantities are desired. They fit easily over eyeglasses. Polarised lenses are especially cut at opposing 45° degree angles. For viewing stereo pairs projected through left and right polarising filters.On special request, we can also deliver paper polarizing glasses with printed advertising on the frame as per customer design.

Anaglyph glasses

Anaglyph images are used to provide a stereoscopic 3D effect, when viewed with glasses where the two lenses are different (usually chromatically opposite) colors, such as red and cyan. Images are made up of two color layers, superimposed, but offset with respect to each other to produce a depth effect.Usually the main subject is in the center, while the foreground and background are shifted laterally in opposite directions. The picture contains two differently filtered colored images, one for each eye. When viewed through the “color coded” “anaglyph glasses”, they reveal an integrated stereoscopic image.
Paper anaglyph glasses use the simplest method for 3D stereo viewing.

On special request, we can also deliver paper anaglyph glasses with printed advertising on the frame as per customer design.

Active shutter glasses

Liquid crystal or active shutter glasses are glasses used in conjunction with a display screen to create a stereoscopic image. Each eye’s glass contains a liquid crystal layer which has the property of becoming dark when voltage is applied, being otherwise transparent. The glasses are controlled by an infrared, radio frequency, DLP-Link or Bluetooth transmitter that sends a timing signal that allows the glasses to alternately darken over one eye, and then the other, in synchronization with the refresh rate of the screen. Meanwhile, the display alternately displays different perspectives for each eye, using a technique called alternate-frame sequencing, which achieves the desired effect of each eye seeing only the image intended for it.

Infitec glasses

Infitec stands for interference filter technology. Special interference filters (dichromatic filters) in the glasses and in the projector divide the visible color spectrum into six narrow bands – two in the red region, two in the green region, and two in the blue region (called R1, R2, G1, G2, B1 and B2 for the purposes of this description). The R1, G1 and B1 bands are used for one eye image, and R2, G2, B2 for the other eye. The human eye is largely insensitive to such fine spectral differences so this technique is able to generate full-color 3D images.

3D projections using Infitec technology do not need special screens.