News

2018-06-12

- a Necessity for Your LIBS Instrument Laser Induced Breakdown Spectroscopy (LIBS) is an extremely versatile spectroscopic technique that can be used to analyze the atomic composition of virtually any material. In a LIBS system, a short laser pulse is used to ablate material from the surface of a sample. The laser pulse energy will be high enough to create bright plasma on the surface of the sample. When choosing a spectrometer for your LIBS application there are various parameters that are important, depending on your requirements. Ibsen believes that the 3 following features are among some of the most important

2018-05-07

A grating with high groove density has a high dispersion. This means that the angular separation of wavelengths from the grating is large. It can be desirable to choose a grating with high groove density for two main reasons: To obtain a compact design (for a wide wavelength range)To obtain a high resolution (for a narrow wavelength range) However, there is a physical limit to how high the grating groove density can be. In this post we will derive a simple formula for calculating the maximum groove density GMAX for a grating that should cover a certain wavelength range λMIN to

2018-04-24

Ibsen is introducing a new spectrometer platform specifically targeted Optical Coherence Tomography. From this platform, Ibsen has just launched an 840 nm highly efficient new EAGLE OCT-S spectrometer with best in class optical throughput and compact size for Spectral Domain OCT. https://ibsen.com/products/oem-spectrometers/eagle/ comprises high resolution, compact, and robust spectrometers, suited for OEM integration into medical and industrial-grade instruments for applications like Raman and SD-OCT. The new EAGLE OCT-S EOS-121 spectrometer is very compact due to the use of Ibsen Photonics’ in-house produced wide bandwidth transmission gratings. These unique gratings furthermore enable us to offer higher efficiency than any competing technology. The wavelength range

2018-03-21

  This note describes how an existing spectrometer wavelength range can be scaled by changing the groove density of the transmission grating, without needing to change other aspects of the design. The starting point is a known spectrometer with a grating with groove density G0, detector width LD, and covering the wavelength range λmax,0 – λmin,0.   The focal length of this spectrometer is given by:    LF= LDcos (β) G0 (λmax,0 - λmin,0)   where β is the diffraction angle of the center wavelength. The ratio between maximum wavelength and minimum wavelength for a given transmission grating based spectrometer

2018-02-23

  Absorbance spectroscopy is a molecular spectroscopy method that uses the wavelength-dependent absorption characteristics of materials to identify and quantify specific substances. Many molecules absorb ultraviolet or visible light emitted from a broadband light source. The absorbance is related to the concentration of the materials in the sample such that stronger absorbance means higher concentration. There are many different approaches for measuring absorption spectra. The most common one is to point a generated beam of light at a sample and detect the intensity of the radiation that goes through it. The energy that is then transmitted is used to calculate