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Expected spectral resolution and simultaneous bandpass are also influenced by how light is coupled into the spectrograph, the central wavelength of interest and associated grating “working angle”, as well as the detector pixel array format at the output plane. Some of these trade-offs can be assessed with the Andor resolution calculator for Kymera and Shamrock Czerny-Turner spectrographs.

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These influence the choice of grating line density, blaze angle/wavelength, master (different masters for a given line density and blaze angle yield different efficiency and polarisation characteristics) and grating size.

where: n is the order of diffraction, λ is the diffracted wavelength d is the grating constant (the distance between successive grooves) θi is the angle of incidence measured from the normal and θd is the angle of diffraction measured from the normal. The diagram above shows the orders of the diffracted wavelength. As well as positive orders, light can also be diffracted in the opposite direction (i.e. n = -1, -2 etc.) Higher orders may also appear, but these decrease in intensity. Usually the first order lines (n=1 or n=-1) are the most intense.

UV Laser Feature: High-Contrast Marking. Compared with standard laser light (1064 nm) and green laser light (532 nm), UV laser light has a remarkably higher ...

Andor’s new Mechelle ME5000 Echelle spectrograph has been designed to provide simultaneous recording of a wide wavelength range (200-975 nm) in one acquisition. It has no moving…

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The dispersed light is then re-imaged by the spectrograph and the required wavelength range is directed to a detection system. Gratings consist of equally spaced parallel grooves, formed on a reflective coating and deposited on a substrate. The shape of the grooves (blaze angle) influences what wavelength range the grating is best optimised for.

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The Andor Shamrock SR-500i imaging spectrometer is based on Czerny-Turner optical design. The optimized optical design provides exceptional performance for multi-track Spectroscopy.…

Andor’s Kymera 193i spectrograph has been designed with research-grade performance, versatility and ease of use in mind. The ‘intelligent’ motorized adaptive focusing allows access…

A diffraction grating is an optical element, which separates (disperses) polychromatic light into its constituent wavelengths (colors). The polychromatic light incident on the grating is dispersed so that each wavelength is reflected from the grating at a slightly different angle. The dispersion arises from the wavefront division and interference of the incident radiation from the periodic structure of the grating.

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With an optical microscope several forms of illumination are available, and at this stage it is plane-polarized light and dark field illumination, in addition ...

The dispersion and efficiency of a grating are dependant on the distance between adjacent grooves and the groove angle. Gratings are generally better than prisms - they are more efficient, they provide a linear dispersion of wavelengths and do not suffer from the absorption effects that prisms have which limits their useful wavelength range.

This is a 0.5X focus-adjustable C-mount camera adapter for older microscopes with 28mm threaded photo-ports. The microscope side has a male 28mm thread, ...

The Andor Shamrock SR-750 is based on Czerny-Turner optical design. The Shamrock is available as a pre-aligned detector/spectrometer option allowing for seamless integration of software,…