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Short Wave Infrared sensor

There are multiple methods and materials to detect NIR and SWIR including InGaAs (indium gallium arsenide), MCT (mercury cadmium telluride), and QDIP (quantum dot infrared photodetector). These three are discussed below.

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SWIR camera

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The Fresnel lens is a special optical lens. lt can now be made from plastic such as acrylic fresnel lens, PMMA, polyvinyl cholride (PVC), polycarbonate (PC) and HDPE. A traditional glass convex lens would be thick, heavy and very expensive, but a plastic Fresnel lens is a thin, flat, lightweight and low cost alternative. A high groove density has a better quality projection image. The Fresnel lens is a good solution for quality image and efficiency at a significantly lower cost. The Fresnel lens is usually corrected for spherical aberration.

Short Wave infrared wavelength

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MCT detectors use the photoconductive effect, where the resistance value of the detector element decreases when exposed to light. MCTs have a wide bandwidth detection range, typically from 2 µm to 14 µm but can vary within 0.8 µm and 30 µm. They are suitable for wide bandwidth applications that have no RoHS requirement.

Short Wave infrared vs near infrared

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SWIR camera price

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In addition, longer wavelengths can be used to look through plastic packaging and silicon, providing another method for nondestructive testing.

Conjugates for the field lens should be the distance from the projector lens on the grooved side, and the distance to the viewer on the frosted sdie.  E-Tay Industrial Co., Ltd. can supply suitable lenses with the plano side either optically polished or frosted.

Fresnel lens, a succession of concentric rings, each consisting of an element of a simple lens, assembled in proper  relationship on a flat surface to provide a short focal length. The Fresnel lens is widely used in our daily life as light collector and fire starter. Particularly in lighthouses and searchlights to concentrate the light into a relatively narrow beam.

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InGaAs is the most well-known material for NIR and SWIR detection. Like silicon photodetectors, InGaAs photodetectors are photovoltaic detectors with a p-n junction, but they have a smaller bandgap energy than silicon, so they detect a longer wavelength range. Standard InGaAs can detect light from 900 nm to 1700 nm, and extended InGaAs can go all the way to 2500 nm. InGaAs detectors are suitable for most NIR/SWIR applications due to their high sensitivity and high linearity.

Shortwave irapp

Albert Tu is a marketing engineer working on NIR/SWIR applications. He’s been helping customers find the right solution for their technology, and he’s developing new business by exploring potential technologies. Albert’s experience in high-tech industry and startups allows him to identify the need first and to find the right solution to solve it. Recently, he enjoys cooking in his spare time and likes to try out new recipes.

Hyperspectral imaging is a form of spectroscopy. Hyperspectral images include full 2D spatial information (like a regular camera image) but split the light ...

SWIR has the capability to detect heat even though it’s not as sensitive as MWIR (midwave infrared) and LWIR (longwave infrared), which can detect low temperatures. Unlike MWIR and LWIR imaging that blur the contours of objects in an image, SWIR imaging produces clearly defined images with added temperature information, allowing the detection of hot spots in a scene or object.

Die Blendenöffnung. Das F in F-Zahl steht für „Focal Length, d. h. die Brennweite eines Objektivs. Die Brennweite selbst bezieht sich auf ...

Between 780-2500 nm, substances such as plastic, organic compounds, and non-organic compounds can be easily differentiated, which is hard to do in the visible range. Hyperspectral SWIR imaging can provide detailed information about an object based on its infrared spectrum.

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The Fresnel lens can be designed and manufactured in very large sizes with light weight due to less than 4mm thickness, so the cost will be lower than traditional magnifiers. ln contrast, a conventional glass lens would be 200mm thick at the edge, weigh over 50kgs and cost thousand of dollars.

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Types of Fresnel lens : positive Fresnel lens, negative Fresnel lens, Fresnel lens array, cylindrical Fresnel lens, circular Fresnel lens, linear Fresnel lens, lenticular Fresnel lens, diffraction Fresnel, Fresnel reflection, Fresnel beamsplitter and Fresnel prism.

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A Fresnel lens can be used to redirect the light at the edges of a frosted rear-projection display screen toward the viewer's eyes, thus eliminating the "hot spot" often observed in such screens by brightening the edges of the display.  Screens of this type include camera focusing screens.  The grooves must face the light source in this application; the grooves often must therefore face the shorter conjugate, an exception to the usual rule.

SWIR wavelength range

Lens Adapters. Lens mount adapters are designed to attach a lens to a camera body with non-matching mounts. Generally, a lens can be easily adapted to a ...

Significantly reduced lens thickness results in a substantial savings in material cost. Fresnel lenses can reduce weight, which reduces mounting and assembly cost. Extremely giant Fresnel lens up to 1000mm can be used to replace a very expensive conventional mirror assemblies in large optical systems.

Fresnel lenses are portable and lightweight sheets used for light gathering or magnifying. The frensel lens was first invented by a French physicist namely Augustin-Jean Fresnel. Augustin Fresnel first used this lens design to build a glass Fresnel lens - lighthouse lens in 1822. Unlike typical spherical or aspherical optical lenses, fresnel lenses are composed of a series of concentric grooves etched into one side of a sheet of plastic. A fresnel lens is a thin, flat optical lens which consists of a series of a series of small narrow concentric grooves on the surface of a lightweight plastic sheet in order to reduce the thickness, weight and cost. Each groove is at a slightly different angle than the next and with the same focal length in order to focus the light toward a central focal point. Every groove can be considered as an individual small lens to bend parallel Fresnel light waves and focus the light. The lens actually eliminates some spherical aberration.

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NIR and SWIR wavelengths aren’t visible to human eyes and have less energy than UV and visible wavelengths, but the light still interacts with objects. So in the case of NIR/SWIR imaging, we can capture images of objects and see aspects that we couldn’t see in the visual range.

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To determine the optical Fresnel lens design equation, all of the parameters are determined for each individual application. Several Fresnel zone formulas are used in Fresnel technologies for precision diamond tooling machines and electroforming and molding processes.

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In compound microscopes, the total magnification is the product of the eyepiece magnification and the objective magnification. objective: ​the first lens light ...

Quantum dots are a new solution for certain NIR/SWIR applications. QDIPs use a layer of quantum dots on a silicon surface to create a three-dimensional quantum confinement active region, enabling the absorption of longer wavelengths. They are suitable for low cost and temperature-critical applications.

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Full page 3x magnifying sheet with black border magnify up to 300%. It is considered the most comfortable magnification for reading small prints, ideal for Viewing and checking tiny hobby and crafting materials, small electronic gadget parts such as screws and pins.

Shortwave irvs swir

To determine the optical Fresnel lens design equation, all of the parameters are determined for each individual application. Several Fresnel zone formulas are used in Fresnel technologies for precision diamond tooling machines and electroforming and molding processes.

E-Tay What is Fresnel Lens? Introduction. Fresnel lenses are portable and lightweight sheets used for light gathering or magnifying. The frensel lens was first invented by a French physicist namely Augustin-Jean Fresnel. Augustin Fresnel first used this lens design to build a glass Fresnel lens - lighthouse lens in 1822.Unlike typical spherical or aspherical optical lenses, fresnel lenses are composed of a series of concentric grooves etched into one side of a sheet of plastic. A fresnel lens is a thin, flat optical lens which consists of a series of a series of small narrow concentric grooves on the surface of a lightweight plastic sheet in order to reduce the thickness, weight and cost. Each groove is at a slightly different angle than the next and with the same focal length in order to focus the light toward a central focal point. Every groove can be considered as an individual small lens to bend parallel Fresnel light waves and focus the light. The lens actually eliminates some spherical aberration. E-Tay magnifier factory is a professional manufacturer to offer superior quality magnifying glass products,and provide perfact service for our clients.. E-Tay is one of the largest and most respected manufacturers of optical magnifiers for a wide variety of applications and magnifying glass, fresnel CPV solar magnifier lens Since 1980.

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Typically we define near infrared (NIR) from 780 nm to 1400 nm and shortwave infrared (SWIR) from 1400 nm to 3000 nm. But it is also common to refer to the entire range from 780 nm up to 3000 nm as NIR or SWIR.

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Water has a high absorption rate at 1450 nm and 1900 nm, making it easy to detect areas with high water density using NIR/SWIR.