Experiment Two: 10.11.10

Part two:

Experiment Two, part two was using the same materials as in experiments one and two, part one, but laid out in a different arrangement see illustrated diagram below.



Results: We played around with the LED light that we had and created a cover over the top of the light emitting end. The cover was made using a piece of chewing gum packet foil with a hole in the centre which we taped to the light using masking tape. This gave us a beam of light that was very straight/concentrated to start with but as the light distance lengthens the light beam would flare to give a larger diameter of light. We set the lens which was of 10cm focal length lens into the table clap and with a ruler measured 2 x the focal length which is 20cm and placed a stripe of masking tape to the table to represent the correct distance from which the light source should be shone. Instead of using a filter we used a razor blade edge which we taped to a lens holder and placed at the correct distance from the lens at 20 cms along with the light source which we placed in a bendy clap permanently pressing the on button on to give us a constant supply of light. The results we viewed by experimenting not through a camera or a video camera but with our own eyes, as the light reflected off the mirror the reflection ended up being reflected onto a white surface behind us in the studio. We played around with the light source positioning and the white board which we brought closer and we ended up with an image of not only the shadow of the razor blade but an out line of the heat source we used, a lighter. At last we had some sort of image it took a few more further attempts to realise we where visualising the invisible! Although it was small and had no colour due to not using a filter we had our first proper results, very exited... I still need to do further research into why the results with a razor blade were successful and not with the filter, but happy all the same.



See images below:






Part one:

Experiment two, part one was almost a near replica of experiment one but with the whole group present. We set up the equipement that i gathered as illustarted below in a photography studio in the TC buliding, but instead of using my multi bulbed torches we used and experimented with the LED torches and lasers that saally had brought in. Another change to my original set up was that we did not use a digital SLR, but instead used a sony camcorder to record the results and the set up and group interaction.



Results: I feel at this point in our experimentation with the Schliren photography technique that we still didn't quite have the right equipemnet or scientific knowlege to perfect this experiment today. We continued on changing variables within this experiment including the distance between the lense and the filter/light source, LED lights and a red laser, multi coloured spectrum filter and an orange light gel, but still had zero results, a little frustrating. More research needed.

Experiment one: 0.9.11.10

I experimented with Various focal length lenses that i borrowed from the science department within the school that i work out in order to explore the Schilren technique.

I Placed a lens on a stand and worked out the focal length of the lens/mirror, which i worked out to be 10cm. The focal length is used to predicted the place at which the light source should be situated, which is 2x the focal length.

The lens i used had a 10cm focal length so the distance at which i placed my light source and filter were 20cm's away from the lens.

I could only get hold of a torch for the light source which i feel was one of the failings of this experiment, after researching further the light needed was a strong LED light with a wattage of around 3.

I printed out various size repeat spectrum pattern filters on to acetate using a laser jet, which i feel also contributed to my failings of this experiment the print was not fine enough and maybe a little dark.

For the heat source in my experiment i used a lighter as the heat that it emitted would have been very hot and hopefully allow this experiment to work.






Results:

I tried variuos mirror and lens types, different size filters and focal lengths and my results were very disappointing. My thoughts are that the light source i used was not direct and strong enough and also the filters seemed to be too dense. I am going to research further and hope the next experiment tomorrow will be more successful with more heads and resources to perfect this effect.



Printed Filter on acetate

Lens / mirror on stand

Schilren Filter

This spectrum of colour is used in one example of creating the Schilren effect

Sclieren: 09.11.10

I am going to experiment with this theory

http://www.ian.org/Schlieren/HowTo.html

Wind Forecast: 08.11.10

The Met Office website allows you to enter either a location, region or postcode to give you wind speed and direction.

http://www.metoffice.gov.uk/weather/uk/se/solent_latest_wind.html

Newspeak: 08.11.10

http://newspeak.zonkzone.net/index.html

API: 08.11.10

An application programming interface (API) is an interface implemented by a software program that enables it to interact with other software. It facilitates interaction between different software programs similar to the way the user interface facilitates interaction between humans and computers

Beaufort: 08.11.10

http://en.wikipedia.org/wiki/Beaufort_scale

The Beaufort Scale is an empirical measure for describing wind speed based mainly on observed sea conditions. Its full name is the Beaufort Wind Force Scale.

The scale was created in 1806 by Sir Francis Beaufort, an Irish-born British admiral and hydrographer. The scale that carries Beaufort's name had a long and complex evolution, from the previous work of others, to when Beaufort was a top administrator in the Royal Navy in the 1830s. In the early 19th Century, naval officers made regular weather observations, but there was no standard scale and so they could be very subjective - one man's "stiff breeze" might be another's "soft breeze". Beaufort succeeded in standardizing the scale.

What is Wind?: 08.11.10

What Is Wind?

Air may not seem like anything at all; in fact, we look right through it all the time, but during a windstorm, air really makes its presence known. Wind is able to lift roofs off buildings, blow down power lines and trees, and cause highway accidents as gusts push around cars and trucks.

Wind is moving air and is caused by differences in air pressure within our atmosphere. Air under high pressure moves toward areas of low pressure. The greater the difference in pressure, the faster the air flows.

Describing Wind

Wind is described with direction and speed. The direction of the wind is expressed as the direction from which the wind is blowing. For example, easterly winds blow from east to west, while westerly winds blow from west to east. Winds have different levels of speed, such as “breeze” and “gale”, depending on how fast they blow. Wind speeds are based on the descriptions of winds in a scale called the Beaufort Scale, which divides wind speeds into 12 different categories, from less than 1 mph to more than 73 mph.

Twilight: 08.11.10

A beautiful Installation: Twilight , 2000, photo HeHe. Installation realised with the technical help of Michael Feild and initially conceived with Stephanie Hankey, Marcus Gosling and Manuel Mercadal.

The movement onto a paper propeller triggers a wave of light and sound across the otherwise dark space. The force of the propagated air dynamically determines the sound and light: a very soft blow will gently lead to one image change whilst a harder blow will carry a faster tide of images and light flow.



www.hehe.org