incarcerate
发表于 2025-3-26 23:59:04
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FLEET
发表于 2025-3-27 04:56:27
Design Techniques and Examples,mutually perpendicular plane mirrors, one of which can travel in a direction perpendicular to its plane. Bisecting the planes of these two mirrors is a semi-reflecting film, or .. An ideal beamsplitter has zero absorption, and a reflectance and transmittance both equal to 0.50
Bumble
发表于 2025-3-27 07:21:14
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harbinger
发表于 2025-3-27 12:19:38
https://doi.org/10.1007/b138575o yield an acceptable signal-to-noise ratio with the slits set to yield the diffraction-limited resolution. This is the case for most, if not all, infrared grating spectrometers, and traditionally the solution has been to open the slits to allow more energy to fall on the detector, so that an accept
Anthrp
发表于 2025-3-27 16:09:45
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婚姻生活
发表于 2025-3-27 21:46:34
Discrete-Time Markov Jump Linear Systemsnments which require micrometer accuracy in mirror alignments and the measurement of mirror displacement. Because of these required low tolerances, interferometers are very expensive and require constant calibration.
禁止,切断
发表于 2025-3-27 21:58:33
Discrete-Time Markov Jump Linear Systemsbed from the environment to be equal to the amount emitted to the environment. This must be so in all directions and at all wavenumbers or wavelengths. This consideration is the basis of Kirchoff’s Law which states that at a given temperature the absorptance, a, of a sample is equal to its emiss
没有贫穷
发表于 2025-3-28 05:36:36
https://doi.org/10.1007/978-1-4615-3130-2ve been designed for grating spectrometers with relatively minor modification. The collimated beam from the interferometer is directed onto one of two off-axis paraboloidal mirrors which focus the beam at what would usually be considered as the “sample” and “reference” positions in the sample compar
Assignment
发表于 2025-3-28 09:38:48
https://doi.org/10.1007/978-1-4615-3130-2t species. By far the most important application of this rapid-scanning property is the on-line identification of peaks eluting from a gas chromatograph (GC/FT-IR). GC/FT-IR measurements using low resolution (20 cm.) interferometers were described as early as 1967 , but only recently have GC/FT-I
Hyperlipidemia
发表于 2025-3-28 12:30:00
Probability and Its Applicationsbsorption of radiation due to vibrations of molecular groups of which the frequencies fall in the infrared region of the spectrum. Up to some ten years ago this kind of spectroscopy was mainly carried out with wavelength or frequency dispersive instruments to record e.g. the energy transmitted throu