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We use light to to ensure farmers an optimum harvest

Our imaging systems are used to study the crops that we grow and the environment we live in.

Hyper-Spectral Imaging (HSI), employing optical spectroscopy methods, can be used to monitor the quality of food that we eat, and the quality of the environment that we live in. Optical Spectroscopy is keeping the world healthy and safe.

Gilden Photonics supply HSI systems that study spectral signatures from the UV range of 200-400nm, all the way up to the Long-Wave Infra-Red (LWIR) region, 8-12μm. This allows us to be able to detect what the human eye can’t see.

Our technology allows us to determine how much water content crops and foodstuffs hold, the percentage of fat present and even the levels of sugar within. HSI has been widely used in food quality assessment and safety control. The non-destructive nature and rapid response of HSI aids the online quality control of food products.

There are important health considerations related to high levels of human dietary intake of fat. Fried foods are obvious targets for product development, as the characteristic texture and flavour are a function of frying, a process that also results in elevated fat contents. When assessing the uptake of fat in foods during and following frying operations, analysis of total fat content is relatively straightforward but determining the distribution of the fat in the food is considerably more challenging. This is relevant because the internal structure of many foods is likely to have an impact on fat uptake but quantifying the impact of structure on fat uptake patterns in a reliable and rapid way is currently difficult.

To demonstrate the feasibility of using Near-Infrared Hyper-Spectral Imaging in this context, images have been acquired from a commercial doughnut. In this case, differences in spectral profile have been used to assess the regions of the doughnut having elevated levels of fat in a qualitative way.

Example spectra for the peripheral and central regions of the doughnut are given in Figure 1, along with an image showing a false colour depiction of regions associated with higher levels of fat as well as those associated with higher levels of moisture. Areas under the relevant peaks for these components form the basis for the colour assignments.

The outer regions, coloured red, represent those areas where fat has been taken up during frying, which would also be expected to be lower in moisture as a result of the frying process. Given that fat and moisture have separate and characteristic absorbance bands in the NIR region, calibrations may be developed to assess both the gradient of fat uptake as well as that for moisture. Given that the image also shows the internal structure of the doughnut, this finding illustrates the way in which the technique may be used to quantify compositional changes in both spatial and chemical contexts.
Figure 1: Frying – Fat and water content in a doughnut (Image from CCFRA, Campden, UK)
Researchers at Campden & Chorleywood Food Research Association (CCFRA) and Gilden Photonics developed a HSI system to determine the distribution of fat and moisture content in fried foods, distribution of fat in meat, freshness of fish and evaluation of baked goods. HSI facilitated the analysis of non-uniform distribution of fat in a doughnut. The fat and moisture shows separate characteristic absorbance bands in NIR region (Figure 1).

Latest News

New Distributors: Italy and Chile
02/07/2014 at 12:17pm
Gilden Photonics Ltd are pleased to announce that a further two internationally respected Photonics Industry organisations have joined our network of international distributors. Based in the Eternal City of Rome, Biofontica SRL have become our latest European based distributor and Agsens from Santiago will represent Gilden Photonics in the Republic of Chile.

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Gilden Photonics Ltd: Exhibiting at IUPAC 2014
02/07/2014 at 10:37am

Gilden Photonics Ltd, Europe's leading manufacturer of Optical Spectroscopy  Systems and components will be exhibiting at the XXV IUPAC symposium on Photochemsitry in Bordeaux from July 13th to July 18th 2014. 

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Meteo-Tech appointed as Gilden Photonics new distributor for Israel
01/04/2014 at 1:46pm

Gilden Photonics,  the UK's leading manufacturer of Optical Spectroscopy and Hyperspectral Imaging systems are delighted to announce that Meteo-Tech have been appointed as the exclusive Gilden Photonics distributor for Israel.

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Gilden Photonics announce new Switzerland distributor
21/03/2014 at 10:41am

Gilden Photonics, are proud to announce that General Microtechnology and Photonics (GMP) has been appointed as its distributor for its full product line in Switzerland.

Please visit: www.gmp.ch

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European Symposium on Atomic Spectrometry ESAS 2014
14/03/2014 at 11:07am

Gilden Photonics and our Czech Republic distributor, Hilger, will be attending the European Symposium on Atomic Spectroscopy (ESAS) in Prague from 19-21 March.
For more details on the event please see: http://esas-cssc2014.spektroskopie.cz

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Gilden Photonics at Analytica 2014
27/03/2014 at 4:19pm
Gilden Photonics will be presenting at Analytica 2014 in Munich, Germany, from the 1st - 4th April with their German distributor Laser2000.
For all enquiries please see Michael Högele at the Laser2000 stand:
Hall A2, Stand 303

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Forthcoming Events

  • Photonex 14

    Ricoh Arena, Coventry; 15th – 16th October 2014

    More details >

  • Photon 14

    Imperial College London; 1 – 4th September 2014

    More details >

  • SHIRE 2014: Symposium on Hyperspectral Imaging in Research & Engineering:

    The University of Sheffield, 10 – 11th April 2014.

    More details >

  • SU2P Symposium

    McCance Building, University of Strathclyde, 31st March - 1st April 2014

    More details >

  • Analytica 2014
    Gilden Photonics will be presenting at Analytica 2014 in Munich, Germany, from the 1st - 4th April with their German distributor Laser2000.
    For all enquiries please see Michael Högele at the Laser2000 stand:
    Hall A2, Stand 303

    More details >

Contact us

Gilden Photonics Ltd.
Unit 13 Telford Court
9 South Avenue
Clydebank Business Park
Glasgow G81 2NR

tel: +44 (0)141 952 9475
fax: +44 (0)141 952 9400