News

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 is always a constant,

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 the

2018-01-17

Ibsen has launched a new variant of the FREEDOM family of compact and high-resolution spectrometers, the FREEDOM C series with improved resolution. We will be introducing this new series of spectrometers at SPIE BiOS and Photonics West in San Francisco, USA. Compact FREEDOM C with Improved Resolution The FREEDOM C offers a very high resolution - down to 0.15 nm - in a small footprint of only 61 x 65 x 19 mm. The series includes a spectrometer for the UV, the VIS, and the VIS-NIR range all using the latest CMOS detector technology with 4096 pixels The spectrometers include

2018-01-16

For immediate release Press Release, Farum, January 16, 2018 Ibsen Photonics (ibsen.com), the global leader in fused silica transmission gratings and industrial grade spectrometer modules, today announced the FREEDOM C series of compact high resolution OEM spectrometers. The FREEDOM C offers a very high resolution – down to 0.15 nm – in a small footprint of only 61 x 65 x 19 mm. The series includes a spectrometer for the UV, the VIS, and the VIS-NIR range all using the latest CMOS detector technology with 4096 pixels. The spectrometers include a cylindrical lens to increase throughput and a new slit

2017-03-23

  Ibsen Photonics is participating in a EU Horizon 2020 project, GALAHAD, aimed at developing high resolution OCT for glaucoma diagnosis. GALAHAD stands for Glaucoma-Advanced, Label-Free High Resolution Automated OCT Diagnosis, and the project was initiated in December 2016. Ocular damage caused by glaucoma Glaucoma is a complicated disease in which damage to the eye’s optic nerve leads to progressive, irreversible vision loss. It is the second largest cause of blindness. It is not possible to cure glaucoma or restore lost vision, but disease progress can be halted with current methods, hence it is important to diagnose as early as