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Affordable linear polarizing film is ideal for class demonstrations relating to polarized light experiments, rotator, light scattering, light reflection.

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The dichroic dye is usually a solution of iodine and potassium iodide. And then extend the dyeing film, extending to give the Dichroic dye arrangement, the higher the order, the prepared polarizing film optical properties are better.

The principle is that we usually only use two glasses to see the object to produce three-dimensional sense, if the use of two shots, such as the human eye, from two different directions at the same time takes the film scene image, made positive film.

At present in the general polarization instrument and many of the partial and the partial detection device using artificial polarizer.

High contrast linear polarizer film sheet is perfect for a wide range of imaging applications and all kinds of experimentation.

Focal depthcamera

2. Photographic distance is inversely proportional to focal depth. The closer the shooting distance is, the greater the depth of focus; the longer the shooting distance is, the smaller the depth of focus is.

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Focal depthdefinition earth science

The earliest artificial polarizer was invented by Polaroid company Edwin H. Land in 1928. Although it has 94 years of history, but the process principle and material are still roughly the same.

Depth of focus: refers to the distance that the focus (focal plane) is allowed to move along the optical axis of the lens while maintaining a clear image.

The iodine polarizing film has a high permeability, high contrast and a wide range of wavelength bias characteristics, the price is relatively cheap, so for a wide range of applications.

In the projection through the two projectors with the vibration direction perpendicular to each other, two linearly polarized light superimposed on the screen, the human eye through the above polarized glasses to watch, each eye can only see a corresponding independent image, Like a direct view to produce a three-dimensional feeling.

Factors and rules affecting depth of focus 1. Aperture is inversely proportional to depth of focus. A small aperture means a large depth of focus; a large aperture means a small depth of focus.

Focal depthdefinition in earthquake

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Because the depth of field of a low-magnification objective lens is larger, it causes difficulties when taking photos with a low-magnification objective lens. Details will be covered in photomicrography.

It is a filter sheet which allows a specific polarization of light waves to pass through and block other light called a polarizer sheet (polarizing film) or Polaroid filter.

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Plastic polarizer films are the least expensive and commonly used in liquid crystal display such as screens of calculators or computer monitors, polarized sunglasses, and 3D movie glasses.

4. The depth of focus is proportional to the circle of blur. The larger the permissible circle of blur, the greater the depth of focus; the smaller the permissible circle of blur, the smaller the depth of focus.

The polarizing property of the dye-based polarizing film is inferior to that of the iodine system, but the wet heat resistance characteristic is good and belongs to the durability polarized film.

The iodine is absorbed into the molecular chains forming long grids of parallel and darkened lines. The film is then dyed to the color of the desired finished film.

Depth of focus is the abbreviation of depth of focus. That is, when using a microscope, when the focus is on an object, not only all points on the plane at that point can be seen clearly, but also within a certain thickness above and below this plane. Clear, the thickness of this clear part is the depth of focus.

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Resolution ofmicroscope

Polarized films are widely used in research labs, the optical industry and equipment. Commercially available polarizers are made from different materials such as glass, crystal or plastic.

Backfocalplane of objective lens

Polarized film is created from rolls of polyvinyl acetate (PVA). The process begins by heating and stretching PVA to a much longer and thinner sheet.

We sell 0 degree & 90 degree linear polarizer to American, India, Pakistan, Malaysia, Singapore, Australia, Canada, UK, Philippines, NZ, France, Italy, Finland, Brazil, Germany and so on.

Depthof focus

The darker the film, the more polarization it provides. Once the PVA is dyed and dried, it is delicate and hard to handle. To stabilize it, the film is mounted on a sheet of cellulose acetate butyrate (CAB).

3Dlens Corporation's online shop supplies the highest quality pre-cut linear polarizing film in a various sizes near the A4 ~ A1 with superior extinction ratio and high transmittance of unpolarized light in the range of wavelength 400~700nm.

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The applications of polarized film are 3D glasses for movie, polarized sunglasses, polarized fishing glasses, polarizing microscope, camera filter, photography studio light, polariscope, rotating filter by using two polarizers, photoelastic stress analysis, glare reduction, speedometer instrument cluster, window light control, Nintendo Gameboy, monochrome LCD, STN black & white monitor, 3d printer, calculator, dental photography and DIY experiment.

Iodine standard linear polarizing film applications is in a wide range, such as watches, calculator computers, PC, OA machines. In addition, cars, ships, aircraft, outdoor measurement equipment for the use of dye-based polarizing film such a durable polarizing film.

For example, when watching a three-dimensional movie, the audience needs to wear a pair of glasses, which is a pair of vibration perpendicular to each other polarized film.

Light is an electromagnetic wave, the general light in the forward, the electromagnetic vibration direction in all directions. If the electromagnetic vibration occurs only in a plane, that is, the direction of the electric field vibration and magnetic field direction fixed light is called polarized light. The direction of its electric field is called the polarization direction of light.

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It is through the electromagnetic or mechanical action to have dichroic acid quinine sulfuric acid small crystals neatly arranged in a transparent plastic film made of.

Reason: The shooting distance (object distance) decreases, the image distance increases, and the distance between the far and near blur circles increases, so the depth of focus increases.

3Dlens have passed a linear polarizing test for durability 60°C / 90%RH / 500 Hours, so it is a good replacement for Polaroid and 3M HN32 & HN38.

Focal depthmeaning

Definition: The focal depth starts in front of the image plane. When it reaches the image plane, the converging light cone forms a minimal circle of confusion. Then the light cone diverges behind the image plane and extends to the same diameter as the beginning of the focal depth. Its depth is very small. Small is only a few hundredths of an inch. Therefore the focusing width provided by the depth of focus is very small.

Our linear polarizer film material will not fade under normal exposure to the light. Under room temperature and humidity, the life will last for 10~20 years.

The lenscalculator calculates the Focal length of the lens, based on the desired Field of View (FOV), working distance (WD) and image sensor size.

Basically the linear polarizer film structure is by 3 layers material; polarizing membrane PVA (Polyvinyl alcohol) and support layers TAC (Tri-acetate cellulose) on its both sides.

3. The focal length of the lens is directly proportional to the depth of focus. A lens with a long focal length has a large depth of focus; a lens with a short focal length has a small depth of focus.

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Depth of focus If the focal depth is large, the entire layer of the object being inspected can be seen, while if the depth of focus is small, only a thin layer of the object being inspected can be seen. The depth of focus has the following relationship with other technical parameters.

Onto this bare polarizer, additional treatments are applied such as an adhesive glue, hard coating, antiglare, anti-reflection and other surface treatments.

Reason: When the shooting distance is constant, the focal length increases and the distance between the far and near blur circles increases, so the depth of focus increases.