The technical definition of birefringence has to do with a fabric possessing a refractive index various with the propagation course and polarization of sunshine. This usually results in gentle refracting twice earlier than you see it.
By way of pictures, birefringence entails utilizing a polarized filter to take an image of clear plastic that’s already below polarized gentle. The result’s pictures that present a liquid mixture of colours as a substitute of the traditional readability of sunshine.
Birefringence pictures mainly entails the usage of two polarizing filters: one between the topic and the sunshine supply, to polarize the sunshine, and a second on the lens of the digicam.
The primary filter ought to ideally be linear, however the one on the digicam can both be round or linear. Polarized gentle sources are simple to search out, as a result of most LCD tv screens and pc displays already function linear polarization. When you actually would slightly not use a display screen or don’t desire these RGB pixels, simply attempt a lightweight desk that has polarizing paper sitting on prime as a substitute. If you do not have a polarizing lens filter, you need to use a polarized solar glass as a substitute.
Listed here are some tricks to get one of the best outcomes from birefringence pictures.
Offering back-lighting to the topic provides the photo-elasticity (the liquid look to the colours) one of the best impact. When you use a pc display screen, guarantee that it’s pure white. The best strategy to get that is to open Paint or Notepad, and make this system full display screen. Modify the brightness as crucial.
Then, put the polarizing filter onto the lens. Flip it round to see how the looks of the topic modifications. In case your digicam has the “Dwell View” possibility, that is a lot simpler to handle. Take a look at the LCD display screen, and when the topic seems to be such as you need it, take your image.
If you’d like a stronger impact, apply multiple plastic layer.To make a hip, retro picture of a cassette tape that may make a enjoyable 80s social gathering picture for an Evite, set the cassette in opposition to the all-white monitor display screen. When the polarizing filter is in your digicam, you’ll be able to see the swirling bands of shade on the clear floor of the cassette.
After you’re taking the image, you’ll be able to edit the background from white to the colour of your selecting. Going with black permits the intense colours of your cassette to face out with essentially the most distinction.
You’ll wow the folks in your invite listing together with your photographic wizardry!
Supply by Swee Shiong Chong