Kohärenzgefühl

This animated film about the pesky blackfly is based on the song of the same title, written and sung by Canadian folk singer Wade Hemsworth, with back-up ...

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Kohärent sein

Edmund Optics C-mount lens with a fixed focal length of 25 mm and an aperture range from F1.4 - F17. This high-quality 2/3" lens is suited for demanding ...

I.e., if linearly polarized light of various wavelengths enters the quarter-wave plate, it will emerge from it with various degrees of elliptical polarization (essentially a mix of linear+circular polarizations) from it, dependent on its wavelength.

Since no single objective lens can fulfill all the needs of someone using the microscope, several objective lenses of varying magnification and numerical ...

Film has no adhesive, but most people are using small pieces of clear tape to attach the material to their windows. Makes great rainbows if placed in ...

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Kohärenz einfach erklärt

EDIT: The meaning of the word "circular polarizer" as I use it in the first part of the answer above is an optical element which filters out the light of a given circular polarization and leaves only the complementary one. (In practice this could be for instance achieved by a combination of a quarter-wave plate, a linear polarizer, and a 3/4-wave plate.)

On one hand, You can distinguish between the two as the linear polarizer cancels light reflected in a surface at the Brewster angle of incidence, i.e, you cannot see the reflexion. The transmission axis should be in the vertical direction. On the other hand, the circular polarizer differentiates circular polarized light that rotates counterclockwise or clockwise direction. Circular polarizers are often used as antireflection coatings in displays screens, as the light impinging in the display is circularly polarized rotating in one direction when previously transmitted by the circular polarizer, but after reflection then rotates in the opposite direction, and the circular polarizer cancels transmission to the observer.

Kohärent Synonym

However, I have just learned that in photography, the word "circular polarizer" is actually used for a linear polarizer with a quarter wave-plate. In other words, "circular polarizer" in photographic equipment means an optical element which ideally does the following:

202399 — The eyepiece is usually located at the top of the microscope, and its role is to further enlarge the image after the enlarged objective lens, so ...

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Jul 30, 2013 — Typically, the first Fresnel zone (N=1) is used to determine obstruction loss, with methods such as Bullington. Anytime the path clearance ...

Kohärenz Psychologie

Apparently, this piece of equipment gets rid of complications a simple linear polarizer causes with (partially) reflective parts inside the camera.

Kohärent Beispiel

There is a number of ways you can find out whether you are dealing with a polarizer of a given kind, this is because 1) light reflected off surfaces is partially linearly polarized, 2) polarizers of a certain kind polarize your light and you can use that to compare with your polarizer, and 3) LCD screens emit linearly polarized light. As a result, you can do the following to tell which polarizer you have

While doing so, it contributes a base magnification of anywhere from 4x (for a scanning objective lens, typically used to provide an overview of a sample) to ...

Kohärenz Laser

In other words, if you ordered a photographic polarizer, it will be most likely either be a linear polarizer, or a linear polarizer with a quarter-wave plate. Both of them should dim and brighten an LCD screen when rotated and used in the designed direction, but you can tell between the two when you flip it. Then the simple linear polarizer will work exactly the same, but the circular one will work different; it should show less dimming/brightening when rotated and possibly some color variations to the light when flipped.

I have a polarizer which has CIRCULAR PL written on it. This suggests it is a circular polarizer even though I am supposed to have a linear one.

Kohärenz Physik

You can learn more about polarization reading Hecht's textbook "Optics, 5th ed" (Pearson education, 2016, or previous editions), or a more especiliazed texts such as that from Goldstein "Polarized ligh" (Marcel Dekker, 2003), as well as the more recent from Jose Jorge Gil and Ravizgor OssiKovski "Polarized light and the Mueller matrix approach" (CRC press, 2016)

For linearly polarized light, the plane of polarization is defined as a plane paral- lel both to the direction of oscillation of the electric field vector and ...

If you use the polarizer in the way it was designed, it doesn't really matter, because your eyes are unable to detect polarization anyways. However, it changes if you flip it around. Then the light from a linearly-polarized source such as an LCD display gets first shifted in a color-dependent way, and then, based on this shift, filtered out by the linear polarizer. As a result, the flipped photographic "circular polarizer" applied to linearly polarized light will filter out some colors more and some colors less.

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Nevertheless, the second step, the quarter-wave plate, works exactly as described above only for one fixed wavelength of light $\lambda_0$ (this could be e.g. the wave-length of orange light). For other wavelengths (other colors of light), it introduces a slightly different phase shift.

A circular polarizer is often a combined $\lambda$/4- retardader, and a linear polarizer having its transmision axis at 45 deg with the optical axis of the retardader. A linear polarizer cannot transmit light having the electric field vibrating perpendicular to its transmision axis.