Projectors and glass

Today we looked at different glass treatments and the effect that they have on a projected image. Some of the glass worked as a portal for the images to travel through and be changed other glass namely sand-blasted worked as surfaces to be projected onto. Below are a list of the surface treatments and the image effects.

Looked at 220 and 80 grit sandblasted glass - the heaver the sandblast the sharper the image. With holes or shapes cut out of the glass the image travels through these onto the back wall. With shapes such as blobs and squares the image does not travel trough the glass onto the posterior of the object. The image does create some colour on the sides of objects but no readable image. Objects with organic shapes that were sandblasted did not have a big distorting effect on the image.

Sandcast lens and other obects do not throw images onto the back wall they arrest the image at the object - in the case of the lens transmitting it to the back of the object (unclear image - really colours only). On the whole a watery cracked image. Frit with sandcast work had a nice combination with the colour of the projector.

Hot cast objects (in this case we only tried a flat panel) that have been cast onto graphite have a faceted surface that throws the light and spilts it into different spectrums. Because of the amount of faceting this was the treatment that gave the greatest amount of distorted light effects. The image from the projector was not clear. This was just lighting effects with even the mouse turning into a four dimensional moving 'tinkerbell' type image.

Projection onto water and fabric were nice and clear but no particularly interesting effect except the image folded up the side of container.

Untreated Lens filled with water had a nice effect - proably more due to the facets on the edges where it had been cut. Light was defracted and also great soft large images of cords in the glass and small bubbles. The image is not arrested by the glass but is projected onto the back wall.

The facets in Monikas blob where the cut had been made for the LED and the surfaces that were both Convex and Concave (unsandblasted) had one of the best effects once again splitting the light and creating great four dimensional light shapes onto the back wall . THe actual image being projected was not readable on the back wall at all.

Halved blown glass ball with frit - great effect on the object with the colour really coming to light and nice light movement through the glass but no image on the back wall.

Dark glass with etched image. Glass becomes quite translucent and etched image becomes opaque on the back wall.

White antique glass holds the image with no good distortion and no casting of light or image onto the back wall.