Diffractionlimit formula

Learn more details about the properties of acrylic (PMMA) plastic at Polymethyl methacrylate Properties and Their Values by SpecialChem.

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Diffraction-limited resolution

The diffraction limit is the smallest possible size of a point of light that an optical system can resolve. It is determined by the wavelength of the light being used and the size of the aperture, or opening, in the system. It is a theoretical limit and cannot be overcome with traditional optical systems.

diffraction-limited spot size formula

The diffraction limit sets a limit on the smallest details that can be resolved in an image. If an object is smaller than the diffraction limit, it will appear as a blurry point rather than a distinct feature. This means that the diffraction limit ultimately determines the maximum sharpness and clarity of an image.

What is acrylic plastic?Acrylic (PMMA, polymethyl methacrylate) is a widely used amorphous thermoplastic polymer. It is best known by its trade names Lucite® and Plexiglas®.

Acrylic (PMMA) biocompatibilityPMMA is very biocompatible with human tissue. Because it is BPA free, it is also a useful BPA-free alternative to polycarbonate frequently used for making component parts for medical, biological and biopharmaceutical applications.

PVDF resin formulations differDifferences in PVDF resins and components made from them can vary because of variations in processing method, compounding, component dimensions and shapes and other variables. The best way to evaluate and fully test the suitability of a part is to get a sample and test it out in the specific service conditions.

Why lab testing is not enoughIn a lab, it is not possible to cover all the possible variables that might exist in actual operating conditions. This is because so many factors can affect a materials chemical resistance. These include exposure time, chemical impurities, mixing of different chemicals, concentration, extreme temperatures or pressures, temperature and pressure cycling and mechanical stresses.

Diffraction limitedtelescope

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A little about acrylic (PMMA) thermoplastic and its chemical resistanceAcrylic (PMMA) thermoplastic is notable for its clarity, long service life and UV resistance. It is resistant to most detergents, inorganic chemicals, aliphatic hydrocarbons, fats and oils, diluted acids and concentrated alkalis at room temperature. This chart is a guide to PMMA compatibility with a wide range of chemicals found in industrial, commercial and laboratory applications.

In traditional optical systems, the diffraction limit cannot be improved upon. However, techniques such as image processing and adaptive optics can help to improve image resolution beyond the diffraction limit. These methods can be especially useful in astronomy, where the diffraction limit can severely limit the clarity of images of distant objects.

Abbediffractionlimit derivation

An optical system is a combination of components that work together to manipulate light for the purpose of creating an image. Examples of optical systems include telescopes, microscopes, and cameras.

Acrylic (PMMA) chemical resistanceIn general, acrylics are unaffected by laboratory chemical solutions where water is the solvent.

The diffraction limit is determined by the wavelength of light and the size of the aperture, so it will vary depending on the specific optical system being used. For example, a telescope with a larger aperture will have a smaller diffraction limit and therefore be able to resolve smaller details than a telescope with a smaller aperture. Additionally, different types of light (such as visible light vs infrared light) will have different diffraction limits, resulting in variations in image resolution for different wavelengths.

Acrylic is tough, durable, easy to shape and relatively inexpensive. It is especially attractive for its high, optical quality transparency and useful mechanical properties. Acrylic plastic also has excellent resistance to ultraviolet (UV) light and weathering. It does not yellow over time.

Stress CrackingCertain combinations of chemical exposure and mechanical stress can also cause environmental stress cracking. Environmental stress cracking is not purely a result of chemical attack. A combination of three factors cause stress cracking: tensile stress, a stress cracking chemical and the inherent susceptibility of a thermoplastic to stress cracking. Stress cracking chemicals include detergents, surfactants, lubricants, oils, ultra-pure water and plating additives such as brighteners and wetting agents.

Things to keep in mind when referring to this chemical compatibility guideChemical resistance information is based on data provided by testing done under laboratory conditions. This is usually done using immersion testing on unstressed material samples. Also, immersion test procedures are not generally standardized.

Browse the Acrylic Chemical Compatibility Chart Below >>  or  Download the complete Acrylic Chemical Compatibility Chart PDF >>