f-thetalenswikipedia

by S Li · 2019 · Cited by 1549 — In general, the complex characteristics of hyperspectral data make the accurate classification of such data challenging for traditional machine ...

Polkadot beamsplitters are used Fourier Transform Infrared (FT-IR) Spectroscopy, where they function by dividing the incident infrared light into two paths—one directed towards the sample and the other towards a reference. This division allows for simultaneous measurement of the sample and reference signals, enhancing the accuracy and efficiency of the spectral data collection. The polkadot pattern, with its precise distribution of reflective and transmissive regions, ensures consistent and uniform splitting of the infrared light. This uniformity is crucial for maintaining the integrity of the interferometric measurements, leading to highly accurate and reliable FT-IR spectroscopic analysis.

Our proprietary infrared coatings are engineered to provide optimal protection for infrared optics while maintaining their performance. These coatings are specifically designed to seal hygroscopic crystals, such as KBr and CsI, against environmental factors. By preventing moisture ingress, our coatings extend the longevity and reliability of your FT-IR components.

Diffraction gratings are essential components in dispersing light into its constituent wavelengths. In FT-IR spectroscopy, they allow for the separation of complex infrared signals into detailed spectra. Our diffraction gratings are engineered to provide high efficiency and resolution, ensuring that even the most subtle spectral features are discernible. This precision enables researchers to uncover intricate details about their samples.

F-Theta lenses are commonly used in laser scanning systems that require a flat image plane and high resolution. By introducing a specific amount of barrel distortion in the lens, the image height of the F-Theta lens is proportional to the scanning angle. These diffraction limited lens systems can be engineered to produce the desired spot size and have a distortion of less than 0.25% of the entire field of view.

In 1822 French civil engineer Augustin-Jean Fresnel (pronounced Frey Nel) invented a new type of lens that produced a much stronger beam of light. The Fresnel ...

Alpha Industrial Park, Tu Thon Village, Ly Thuong Kiet Commune, Yen My District, Hung Yen Province Vietnam 17721 +84 221-730-8668 rfqvn@shanghai-optics.com

Please contact us for our latest prices on stock parts and pre-engineered specifications.  Our pre-engineered scan lenses give our customers the option to choose from a variety of preliminary designs based on what suits their application best. Just tell us your application requirements (dimensions, wavelength range, field of view, etc.) and our team of expert engineers will optimize our preliminary designs to meet your exact needs. This will save you the hassle of fully designing a product from scratch and help reduce or eliminate design fees!

Omega coating heritage dates back to 1936, and spans a wide range of technologies: Sunglasses to space-borne sun-visors; halogen light bulbs to COVID-fighting UV-C lamps, supermarket scanners to modern printers, astronomical mirrors to prestigious art installations to entertainment optics: if an application requires a precision or decorative coatings we surely have a proven solution.

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The angle between the output beam and the normal of the image plane is called the output scan angle, abbreviated OSA. This angle is not constant across the image field, although the change in OSA is small enough it will not effect scanning applications. For telecentric lenses, the output scan angle is always zero , which solves this problem by ensuring that the laser beam remains perpendicular to the scanning plane.

Our proprietary infrared coatings seal these hygroscopic crystals, protecting them from moisture and extending their operational lifespan while simultaneously enhancing optical performance. These coatings ensure that your infrared optics maintain their performance even in challenging conditions.

Omega Optical produces diamond turned off-axis parabolas in a variety of configurations, as well as coated or uncoated. We are specialists in producing OAP's with excellent mechanical or optical datums to ensure easy, precise, and repeatable alignment.

Omega Optical offers a variety of advanced infrared optics from specialty materials which enhance the performance of FT-IR instruments:

Please contact us at 732-321-6915 or contact a representative to learn more about product availability, lead time, pricing and capabilities.

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At Shanghai Optics our f-theta lenses are carefully designed to minimize the field distortion and curvature, providing a flat image plane. Our factory standard lenses have a max distortion of no more than 0.25%, and provide transmittance of greater than 90 percent. The high quality silica used for our lenses enables a high damage threshold. In stock lenses have focal length options of 63 mm to 645mm, and feature custom optical coatings that are suitable for use in the UV, the visible, and the infrared range.  We carry f-theta lenses optimized for 355nm, 532 nm, and 1064 nm wavelengths. By incorporating flat field scanning lens designs, our f-theta lenses ensure uniform scanning performance across the entire field, making them ideal for a variety of precision applications.

At Omega Optical, we are committed to advancing the field of FT-IR spectroscopy through innovative optical solutions. Our expertise in optical filters, diffraction gratings, infrared optics, and coatings ensures that you have the tools you need to achieve unparalleled precision and accuracy in your research and analysis.

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Room 609, 6/F, Global Gateway Tower, No.63 Wing Hong Street, Cheung Sha Wan, Kowloon, Hong Kong +852-54993705 info@shanghai-optics.com

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The primary function of a beamsplitter is to separate a single beam of light into two parts, one reflected and one transmitted. The incident light is split at the surface which is usually set at some angle so the reflected and transmitted beams are separated. Any metal layer that forms a partially reflective mirror can serve as a beamsplitter, and many under the “plate” category are no more sophisticated than that.

Sep 12, 2024 — Microscope objective lenses are a crucial part of a microscope, responsible for magnifying the specimen being observed. They are used to gather ...

... Lens Simulator Logo. author image Fu Kwun Hwang; Fremont Teng; lookang. © 2020, Fu Kwun Hwang; Fremont Teng; lookang. Compiled with EJS 6.0 ...

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1/4 X 2 X 11 3/4 SLOTTED ANGLE BRACKET (NF) (UT-850MIIIWT Parts). 1/4 X 2 X 11 3/4 SLOTTED ANGLE BRACKET (NF)

Operating wavelength, spot size, and scan field diameter (SFD) are key parameters to consider when selecting the ideal f-theta lens for your application.

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Optical filters play a crucial role in FT-IR spectroscopy by selectively transmitting desired wavelengths and blocking out unwanted ones. Our filters are designed to optimize signal-to-noise ratios, ensuring that only relevant spectral information reaches the detector. With a range of custom filters tailored for specific applications, Omega Optical helps you achieve the highest level of precision and accuracy in your FT-IR measurements.

Discover how Omega Optical can enhance your FT-IR spectroscopy capabilities. Contact us today to learn more about our products and services.

Learn more about the full suite of capabilities which are trusted by leading Global OEM’s and their Start-up challengers to deliver the right photons, to the right place, at the right time.

All of the visible wavelengths have photon energy lower than the ionization potential of our eyes so any single photon won't damage your eye.

INSTALLATION TOOL ( Compatible sizes: 8 – 32 UNC, 8 – 36 UNF, M4 x 0.7 METRIC) - ID: 401524-87010. These combination tools can be used to both install a helical ...

Our windows and window coatings are designed to withstand environmental conditions such as temperature changes, humidity, abrasion, and mechanical stress, ensuring that the performance of the optical system remains unaffected. Optical windows can be made from various materials, such as glass, fused silica, or crystals, depending on the specific requirements of the application, such as the wavelength range and environmental durability needed.

Omega Optical also provides a range of FT-IR accessory optics, including Attenuated Total Reflection (ATR) sampling optics and liquid cells.

We are capable to perform every lens and mirror shaping and polishing step after material synthesis. A multitude of conventional spindles combined with CNC grinding and diamond turning can fabricate virtually any curved optic.

In FT-IR spectroscopy, precise light guidance from source to sensor is crucial. Our off-axis parabolic mirrors are designed to direct light efficiently, minimizing loss and enhancing the quality of the spectral data. These mirrors are crafted with high precision to ensure that every photon is utilized, resulting in superior sensitivity and accuracy in your measurements.

Our commitment to finding the right solutions for difficult problems means that we are capable of doing what other engineers cannot. Some say we bend physics and solve the unsolvable. Can we? Maybe. What we know we can do is this: We ask questions and we dig, because sometimes the solutions people believe they need only scratch the surface

The scan field diameter is also known as the scan length and can be abbreviated SFD. This is defined to be the diagonal length of the square area in the image plane where the laser beam is focused by the f-theta lens. The SFD of the lens will define deflection and focal length.

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F-theta lenses are important in industrial material processing, especially in the drilling, welding, and cutting of synthetic materials. They are also used in biotechnics, specifically in confocal microscopy and ophthalmology. For applications requiring precise scanning, scan mirrors are often used in conjunction with f-theta lenses to direct the laser beam accurately across the target area.

Circular Polarized Antenna 205-70 · Available in VHF, UHF, 800/900 MHz configurations · Rugged design to withstand harsh environmental conditions · Circular ...

Description · Mounts Canon FD & FL 35mm SLR lenses to Nikon F Mount SLR Cameras; infinity focus or beyond allowed · Integrated aperture control dial for ...

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At Shanghai Optics we manufacture high quality f-theta lenses for use in laser scanning or engraving systems.  These lens systems are carefully designed to provide a precisely engineered barrel distortion that gives a displacement which is linear on angle of incidence of the input beam (theta). Each f-theta scanning lens is actually an array of three to four air spaced components, mounted in sturdy plastic housing. The use of these lens systems eliminates the needs for bulky, complicated electronic correction and enables design of compact scan systems.

We produce more than just circles and rectangular shaped components. Challenge us to produce a complex shape or pattern demanded by your application.

Fourier Transform Infrared (FT-IR) Spectroscopy is a pivotal technique in modern analytical science, enabling precise identification and quantification of materials. At the heart of FT-IR lies the principle of transforming infrared light into detailed spectral data, providing insights into the molecular composition of samples. Omega Optical is at the forefront of this technology, offering cutting-edge solutions that enhance the capabilities of FT-IR instruments.

The back working distance (BWD) of a f-theta lens is the distance from the paraxial focus point to the lens housing. The back focal length, or BFL, is the distance from the paraxial focus point to the apex of the lens (the apex of the outer glass element).

The spot size in a laser system can be calculated by multiplying a constant (C=1.83 for a Gaussian beam truncated at the 1/e^2 diameter) by the wavelength of the laser and the effective focal length of the lens, divided by the entrance beam diameter.  The ability to position the appropriately-sized spot at any point in the flat image plane is crucial to laser scanning, and a good f-theta lens makes this easily attainable. A spot diameter diagram, which indicates the spot diameter variation depending on field position, can be provided on request.