Passive eyeware come in a number of different types, the more popular types are Polarized and Analglyph.

Analglyph

The most cost effective is Analglyph, a technique that has been around since the 1850s. Typically Analglyph glasses consist of a red and blue or red and cyan the latter being the most popular. Recently the movie industries has released films using the red/cyan combination. Feature films such as Shrek 3D, Spykids 2 #d and Chicken little have all used this method of entertaining audiences with the 3D experience. There are also some educational and scientific projects using the analglypgh #d option to give the viewer a more in-depth visual experience . Good examples of this are projects like NASA recent offering of the Mars explorer, a number of childrens books on insects and bugs have been published along with articles in a number of magazines.

So what is it?

First you need a pair of images taken of the same subject at the same time but slightly offset to give you a different perspective. These images are then treated so that one image is red and the other is a cyan, these images are then imposed onto each other. Sounds complicated but there are a number of commercial and free software programs that can help you with this.

When the image is viewed through the glasses, the glasses filter out the unwanted information so that you only see one image but with an increased depth….3D

Polarised

The main disadvantage of the Analglyph stereo image process is that it is very difficult to reproduce true colors, in fact the creator needs to be very careful on the color composition of the original subject.

To get around this issue, a polarised technique can be used. Here you use two light sources or projectors, one for the left image/eye and the other for the right image/eye. Each projector has a polarised filter in front of it to polarize the light perpendicular to each other. The image is then viewed matching polarised eyeware, these polarised eyeware or glasses work in a similar way to the Analglyph technique in that the left will view the overlap area of the left image whilst the right eye views the right overlap area. VRS supply filters that have a 45 degree light orientation per eye, along with the matching glasses that come in , paper, plastic and metal frames. Whilst it is more expensive in terms of equipment, passive stereo viewing using the polarised technique gives a far better 3D experience than Analglyph and is far cheaper than moving to the next technology which is the active stereo.(add vrs NuVision link)

We distribute both linear polarized glasses and circular polarized glasses. Plain white frame paper polarized glasses are ready for immediate shipment or customize the frames with your own unique design or custom shape. Plastic frame linear polarized glasses are also available.

CHOOSE FROM LINEAR OR CIRCULAR POLARIZER FILTERS.