anti-reflectioncoating

To create a 3D movie two images are projected overlayed onto the same screen through circular polarizing filters of opposite handedness. (See the What’s Happening section on the polarization page to learn about linear polarization.) Circular polarization works similar to linear polarization, except instead of the polarization running up and down, or left and right it works in left hand or right hand spirals.

An anti-reflection (AR) coating is a type of optical coating applied to the surface of optical filters and other optical elements to reduce reflection. In typical imaging systems, this improves efficiency since less light is lost due to reflection. In complex systems such as telescopes and microscopes, the reduction in reflections also improves the contrast of the image by elimination of stray light. This is especially important in planetary astronomy. In other applications, the primary benefit is the elimination of the reflection itself.

Using circularly polarized light to create movies is a huge advantage over linearly polarized light. Because of the properties of circular polarization you can sit anywhere in the theater as well as move and tilt your head and get the same viewing experience. With linear polarization your best viewing position is directly in the center of the screen. You also don’t want to move your head as twisting or tilting can cause the opposition of the polarizers to bleed into each other and distort the image.

anti-reflective coating是什么

Andover produces a non-radioactive dielectric multilayer coating designed to reduce the reflection of Germanium substrates in the infrared. With an AR Coating, reflection is reduced from 36% per surface to less than 1% per surface. Constructed of hard, durable first-surface dielectric optical coatings on optical-quality germanium substrates, these filters will withstand cleaning and handling associated with any high-quality optical component. For your convenience and economy, we offer these filters in two standard sizes: 25 mm and 50 mm dia. However, we can produce custom sizes and shapes, as well as custom optical characteristics.

anti reflective coating中文

Many coatings consist of transparent thin film structures with alternating layers of contrasting refractive index. Layer thicknesses are chosen to produce destructive interference in the beams reflected from the interfaces, and constructive interference in the corresponding transmitted beams. This makes the structure's performance change with wavelength and incident angle, so that color effects often appear at oblique angles. A wavelength range must be specified when designing or ordering such coatings, but good performance can often be achieved for a relatively wide range of frequencies: usually, a choice of IR, visible, or UV is offered.

Overview: When you place different filters in front of each eye, different direction polarizers for example, you can create a stereoscopic 3D effect. Stereoscopic means placing 2 identical images, that are slightly offset, on top of one another. When these images use different polarizing directions, and you use matching polarizers, one over each eye, your brain perceives this as a 3D image.

The glasses you wear to view the movie contain a pair of analyzing filters (a quarter wave plate and a linear polarizer) of opposite handedness. Light that is left-circularly polarized is blocked by the right-handed analyzer, while right-circularly polarized light is blocked by the left-handed analyzer. When you view each of those through one eye your brain sees two different images and interprets that as a 3D image.