Lithium fluoridestructure

Lithium Fluoride (LiF) Windows provide high, flat transmission from 150nm to 6μm. Lithium fluoride has excellent transmission in the vacuum ultraviolet (VUV) wavelength range of 150 - 200nm. Lithium fluoride also has a low index of refraction, allowing these windows to be used without an anti-reflection (AR) coating. Lithium Fluoride (LiF) Windows are ideal for use as UV transmission windows in spectroscopy applications, as a diffracting element in X-ray spectrometry, or as infrared windows for thermal imaging applications.

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NIREOS is an innovative Italian company specializing in high-tech spectroscopy devices for scientific research and industrial applications, spanning material science, microbiology, machine vision, cultural heritage, food quality control, ultrafast time-resolved spectroscopy, and many more.

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Mar 18, 2024 — the focal length is the distance between the center of the projection and the image plane; the optical axis is the line perpendicular to the ...

Lithium fluorideionic or covalent

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Nov 26, 2014 — A powerful laser beam (blue) can theoretically be polarized by sending it through a plasma where it interacts with a second, more powerful beam ...

Lithium fluorideUses

The light intensity at the detector as a function of the delay is called interferogram. It is sufficient to compute a Fourier transform of the interferogram to retrieve the spectrum of the light. In this animation, the GEMINI is first set to zero and then it slowly increases the delay between the two replicas, thus building the interferogram step by step. The measurement is performed until there are no appreciable residual oscillations in the interferogram. In this example, this corresponds to a maximum delay of 300 femtoseconds. At this point, the retrieved spectrum perfectly matches the input spectrum.

Note: Lithium fluoride is sensitive to thermal shock and is attacked by atmospheric moisture at temperatures above 400°C.

When high spectral resolution is needed, to resolve sharp features such as this narrow peak, using a monochromator one has to either use a grating with higher dispersion or to close the output slit.

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This is the GEMINI’s working principle.  The spectrum of the light at the input of the device is measured using a different approach, based on Fourier-Transform spectroscopy. In fact, GEMINI is an interferometer that creates two replicas of the light with a finely tunable delay.  In this way, the light throughput is much higher than a monochromator because the output spectrum is not filtered and there are no input or output slits. Furthermore, GEMINI has no gratings, thus providing extremely broad spectral coverage, from the ultraviolet to the mid-infrared spectral region.

Lithium fluorideionic compound

A varifocal lens is a manually adjustable zoom lens that allows you to control the focal length. The opening angle becomes larger by zooming out and smaller by ...

In this way, only one color is transmitted through the output slit at a given time. Spectra are then recorded wavelength by wavelength, rotating the grating.

Lithium fluorideformula

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Let us now consider a spectrum containing sharp peaks, thus requiring higher resolution. With a monochromator you should close the output slit or use a diffraction grating with higher dispersion. This would in turn reduce the amount of light on the detector.

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Furthermore, gratings have limited efficiency and narrow spectral bandwidth, so that you often need to use two different gratings and then stitch together two separate measurements to record the spectrum of polychromatic light.

May 14, 2022 — Infrared technology has been around for some time and has a lot of uses, from the detection of infrared radiation to the use of infrared to send ...

A positive focal length optical lens always introduces positive spherical aberration. This is evident from its transmitted wavefront error (WFE) profile and ...

These optics require special handling to avoid damage and maintain peak performance. Email us or Chat with a technical support representative Contact us Contact us for tips on proper handling, cleaning, and storage procedures.

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The presence of the two slits and the sequential recording of the light reduce the throughput and increase the measurement time considerably.

On the other hand, with GEMINI it is sufficient to increase the maximum delay of the scan, in this case up to one picosecond, to increase the spectral resolution, without any loss of throughput.

A monochromator is an optical instrument which measures the light spectrum. Light is focused in the input slit and diffracted by a grating.

Jan 28, 2021 — Define multispectral (or multi-band) remote sensing data. Describe at least 3 differences between NAIP imagery, Landsat 8 and MODIS in terms of ...

Made for temperature control in film processing, particularly colour processes where temperature is ciritcal, the Precision Temperature Water Bath is custom ...