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Mirau interference

Nov 13, 2015 — This section is a compendium of web resources focused on all aspects of polarized light microscopy, optical crystallography, and related techniques.

Whitelight3d scanner

"Optical surface metrology complements tactile measurement techniques" Prof. Dr. Albert Weckenmann about optical and tactile surface measurement

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Find out more about the strengths and limitations of these four common surface measurement methods in the technology comparison, regarding vertical and lateral resolution, application sweet spots on smooth surfaces or roughness measurement, with or w/o stitching

Interferometry

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Whenever the optical path for an object point in the measuring arm and the optical path in the reference arm are the same, constructive interference takes place for all wavelengths in the light source’s spectrum and the camera pixel of the object point in question has maximum intensity. For object points with a different optical path, the assigned camera pixel has a low intensity. Consequently, the camera registers all the image points at the same height.

I recently was allowed to go visit a vault on a movie studio lot I'll allow you to remain anonymous. While on the lot, I got to go into the vault and check out all the props that have been used in film across generations.

So, go out and experiment with this highly stylish and effective lighting technique and see how they change not only the look of your films but also the way they affect your story.

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Whitelightinterference

Coherentlight

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Illumination is the result of that light on surfaces on which it falls. Thus the illumination makes the surface look more or less bright with a certain colour.

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There are so many to go through, but I chose 15 that matter the most and make the most lasting impact when the credits roll.

On the other hand, the cones are the color-sensing cells of the retina. When light of a given wavelength enters the eye and strikes the cones of the retina, a ...

When filmmakers talk about cinematography they often described as "painting with light." However, great DPs don't just know how to wield light like Picasso, they also know how to wield darkness, and one lighting technique that utilizes the dark stuff to make shots more dynamic and visually interesting is the silhouette. If you're interested in learning more about the different ways in which you can use silhouettes effectively in your work, check out this video in which Aputure's Ted Sim and DP David C. Weldon Jr. share four examples of silhouette lighting, how to light them, and how use them cinematically.

Whitelight interferometry

Large area systems with a telecentric configuration allow you to simultaneously and quickly measure the topography of large surfaces in a single measurement. On the other hand optical profilers based on microscope systems, where the optical configuration including the reference arm is integrated into the lens, are more suitable if you require more lateral details on the whole area.

Coherence scanninginterferometry

Silhouettes are highly effective in visual storytelling for a number of reasons. For one, they provide perhaps the most obvious and eye-catching contrast—they're literally large areas of darkness over large areas of light. So, if you're looking to catch your viewer's attention, throwing in a silhouette might be an effective method. They're also great at communicating with audiences and establishing a mood. Silhouettes were very popular in the film noirs of the 40s and 50s and became one of the major hallmarks of the film movement due to its success at creating a sense of mystery and intrigue. Horror films also relied on this technique heavily to build anticipation in its audiences, keeping the monster, killer, or bloodthirsty ghoul safely in the shadows of a silhouette until the time was right.

It was a magical experience that got me and my friend talking. What are the most iconic and important props of all time? Which ones would we kill to own, and why are they so special?

Modern white-light interferometers use the interference effects that occur when the light reflected from the sample is superimposed with the light reflected by a high-precision reference mirror. The measurement method is based on the principle of Michelson interferometry, where the optical configuration (image) contains a light source with a coherence length in the μm range. The collimated light beam is split into a measurement beam and a reference beam at a beam splitter. The measurement beam strikes the sample, the reference beam strikes a mirror. Light reflected from the mirror and the sample is recombined at the beam splitter and focused onto a camera.

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With the areal measurement method of white-light interferometry (coherence scanning interferometry), the vertical resolution does not depend on the selected objective. Whitelight-interferometry is the only measurement method where the resolution is independent of the field-of-view.

There are not only many other ways to utilize silhouettes but also achieve them with different lighting setups. Sim and Weldon provide step-by-step instructions on how each of their four setups were done. These are the four they demonstrate in the video: