Welcome to the NEWS-Portal
of Gigahertz-Optik GmbH
Welcome to the Gigahertz-Optik GmbH NEWS portal
On the following page, we'll provide you with the latest information on product revisions, software updates, event announcements and many interesting topics from our company. You'll have the opportunity to get an idea of our developments. If you have any questions, please do not hesitate to contact our technical sales department. We're here to help.
- Always up-to-date for new product developments and updates
- Current information on events we participate
- Our latest press releases
Published on 09-10-2019
BTS256-EF measures new flicker metrics for compliance with Ecodesign Directive
The European Commission´s proposed regulation of lighting under the Ecodesign Directive will establish mandatory product performance and quality requirements on all lighting products. This new EU directive will include strict requirements for flicker and stroboscopic effect, collectively referred to as temporal light artefacts (TLA). Simple measures such as flicker index and modulation depth will not be adequate as they do not distinguish the possible TLA effects and do not account for the effect of frequency-dependent sensitivity or the wave shape of light output. The BTS256-EF spectral light and flicker meter measures the specific metrics required by the regulation, PstLM and SVM.
The metric used for flicker in the Ecodesign regulation is the parameter ‘PstLM’, short-term flicker severity, where a value of PstLM=1 means that the average observer has a 50 % probability of detecting flicker. The metric used for stroboscopic effect in this regulation is ‘SVM’, stroboscopic visibility measure, where SVM = 1 represents the visibility threshold for an average observer.
The limits in this new EU directive are currently discussed to be PstLM < 1.0 and SVM < 0.4 although there is lobbying from the lighting industry to relax the SVM limit to <1.6. Regardless, meeting these demanding limits, particularly for SVM, will require considerable effort by manufacturers prior to the September 2021 enforcement date.
Besides full TLA measures, the BTS256-EF in conjunction with its provided software provides comprehensive photometric and colorimetric data required for general lighting applications. Additional functions are also provided for specialist tasks such as horticultural and human centric lighting.
Published 17.09.2019, Author: Andreas Gross
New stray light correction method enables UV hazard measurements with array spectroradiometer
A new stray light correction method implemented in the BTS2048 UV array spectroradiometer now enables applications previously only possible with double monochromator systems. This novel method was presented at the CIE’s 29th quadrennial session.
It combines Out-of-Range and In-Band stray light correction techniques, thereby greatly increasing the dynamic range of accurate UV measurements. This performance is particularly beneficial for the assessment of UV hazards in accordance with the measurements required by IEC / DIN EN 62471, EU Directive 2006/25/EC and ICNIRP guidelines.
The compact BTS2048-UV-S is convenient for in-situ measurements as well as laboratory based setups. This hybrid stray light correction method has been incorporated into the latest S-BTS2048 software.
Measurement of a 450 W xenon lamp (at 180 mm) with a double monochromator reference and BTS2048-UV-S with and without correction.
Published on 02.09.2019, Author: Sebastian Seuferling
New photometric detector for very low illuminance measurements
To meet the demands of the increasing number of very low light level applications, Gigahertz-Optik has introduced the VL-3707 precision photometric detector capable of accurate measurements down to less than 100 μlux.
For example, the VL-3707 is suitable for testing and characterising night vision equipment used in surveillance, security and automotive applications. The measurement of moonlight and starlight (mlux to μlux) enables research on light pollution of the night sky. Emergency lighting standards (e.g. DIN EN 1838 and ISO 30061) require measurement resolution in the mlux range.
The VL-3707 incorporates a latest technology photodiode, high transmission photometric filtering, and a cosine diffuser to create a highly sensitive illuminance detector. Used in conjunction with the Gigahertz-Optik P-9710 Optometer, the VL-3707 provides a sufficiently high signal-to-noise ratio for reliable measurements even in the 100 μlux range.
Total Ozone Column (TOC) system at PMOD/WRC with array spectroradiometer
The Physikalisch-Meteorologisches Observatorium Davos and World Radiation Center (PMOD/WRC) has developed a cost effective system, KOHERENT, based on a Gigahertz-Optik BTS2048-UV-S-F array spectroradiometer to retrieve TOC from a full spectrum in the UV band 300 nm – 350 nm thereby reducing the uncertainty of the ozone retrieval. Furthermore a traceability of TOC measurements was ensured.
See p33 of annual report:
Published on 08.08.2019, Author: Andreas Gross
As part of a product update, the range of functions of the compact MSC15 spectral light meter (https://www.gigahertz-optik.de/en-us/product/msc15) has been extended. The device is particularly suited to the measurement of LED based lighting in terms of illuminance, spectrum, color, CRI, PAR and human centric lighting metrics.
With this update the device gets internal memory for the local storage of up to 10 measurements which can be either managed directly by the MSC15 or by the supplied software.
In addition, a menu for individually switching on and off the possible display screens has been added. This user customization no longer requires connection to a PC thereby simplifying the configuration of the device for individual measurement tasks.
The MSC15 offers simple and intuitive operation, fast display of measurement results and traceable calibration. It can be used to measure any light source, displaying spectral irradiance from 360 nm - 830 nm as well as photometric and colorimetric data including photopic, scotopic and melanopic illuminance, color rendering indices, color temperature and CIE chromaticity. For horticultural applications, the MSC15 also directly displays PAR PPFD in μmol/m2/s.
Published on 11.06.2019, author: Gigahertz-Optik Inc.
Introducing Jim Leland, Technical Specialist
We take great pleasure in welcoming Jim Leland, as Gigahertz-Optik’s technical specialist based in the USA.
Jim has over twenty years’ experience in radiometry, photometry, colorimetry and related fields.
He has authored numerous papers, patents and industry standards.
Jim has served on the executive boards of the Council for Optical Radiation Measurements (CORM) and the US
National Committee of the CIE. He is an officer of ASTM E12 (Color and Appearance),
chairing subcommittees E12.03 (Geometry), and E12.05 (Fluorescence).
He is a member of SPIE, IES, and ISCC. He studied Physics and Philosophy at Princeton University,
and holds an MS in Imaging Science from the Rochester Institute of Technology (RIT).
Jim Leland - Technical Specialist
Phone +1 603 504-2855
News Archive 2019
Published on 05.06.2019, author: Florian Schropp
Gigahertz-Optik presents the latest product innovations for laser radiation measurement at LASER - World of PHOTONICS 2019
The LASER World of PHOTONICS (June 24 to 27, Munich Trade Fair Center) offers the perfect opportunity to make important contacts within the photonics industry and to find out about the wide range of technologies and systems relating to photonics. This meeting of research and industry promotes the benefits and further development of the photonics industry. Gigahertz-Optik will present new products in the field of laser measuring technology at the fair. The locally based team is looking forward to a lively exchange and interesting discussions about light measurement technology with you.
As a supplier of measuring systems as well as testing and calibration services, Gigahertz-Optik is represented in numerous application fields of light measurement technology. Gigahertz-Optik offers a variety of solutions, especially for the complete characterization of laser radiation (power, pulse shape or pulse energy). Thus, for example, measurement systems can be put together which consist of either a standard or custom integrating sphere and a broadband detector or spectroradiometer (UV, VIS, NIR) to suit the application. For absolute and precise measurements, the systems are calibrated in the laboratory of Gigahertz-Optik which provides traceability to national metrology institutes. New product innovations in the area of compact and miniaturized integrating spheres as well as new developments of high-resolution detector systems will be presented at the fair.
Another focus is the measurement of optical properties of materials for research and industrial applications. Optical quantities such as absorption, transmission and reflection are measured with specially adapted integrating sphere systems. A typical setup includes a light source, a custom integrating sphere, and a detector. It's best to discuss your own particular requirements with your local technical representative. Gigahertz optics will be exhibiting in hall A2 at booth number 500.
Visit us on LASER - World of Photonics
Gigahertz optics will again be represented at LASER - World of PHOTONICS with a product portfolio of high-precision laser metrology this year. Make an appointment today with our specialists for one of the fair days.
DOE Releases Study on Handheld Flicker Meters
Gigahertz-Optik's BTS256-EF Light-Color-Spectral-Flicker Meter Included
The U.S. Department of Energy (DOE) has released the findings of a new study on handheld flicker meters. Flicker - or, more precisely, temporal light modulation - is a repetitive variation in light output over a large frequency range, often exacerbated by relative eye or object movement. Flicker can have adverse effects on health and visual performance.
Handheld meters from several different manufacturers were tested for performance as it relates to Percent Flicker and Flicker Index, as well as the performance at maximum and dimmed light output levels across all light sources tested. See the full report for exact product model numbers and description of laboratory testing, as well as explanations on the limitations of some meters.
The BTS256-EF which was included in the study provides the flicker parameters shown in the table either displayed on the meter itself or through the supplied S-BTS256 Software:
illuminance over time graphic
dominant flicker frequency
FFT flicker frequencies
Hz - %
Short-term flicker per CIE TN 006:2016 with S-BTS256
Stroboscopic Visibility Measure per CIE TN 006:2016 with S-BTS256
Flicker perception with S-BTS256
The BTS256-EF not only measures flicker. It measures illuminance, color quantities, spectral irradiance and PAR - Over 50 different measurands in all!
# 09-29019 Update - BTS256-EF now with Television Lighting Consistency Index (TLCI)
As LED lighting technology in the field of recording technology (e.g., studio or stadium lighting) has grown, it has been found that the previously used method of calculating the color rendering index CRI offers only limited opportunities for light assessment. Thus, the effort in post-production increases to produce realistic color impressions in the image material.
Therefore, the European Broadcasting Union (EBU) developed the Television Lighting Consistency Index (TLCI) and recommended it as EBU R 137. The TLCI is also included in the CIE Report 083: 2019 (Guide for the Lighting of Sports Events for Color Television and Film Systems, 3rd Edition), which provides recommendations for measuring the lighting conditions (color and flicker) at sporting events. For example, in the German Basketball League (BBL) there are requirements for the TLCI of the stadium lighting.
The TLCI specializes in 18 color locations that are relevant to recording and playback devices. Thus, it allows a much more accurate assessment of the quality of light and thus also improves the final quality of the recorded material.
Gigahertz-Optik has now incorporated the TLCI measurement as a method of color rendering determination into its S-BTS256 software. Thus, the 18 color locations as well as the overall rating can be read directly in the software during a measurement with the BTS256-EF and the light quality can be assessed. In combination with the integrated flicker measurement, the light for camera recordings can be assessed precisely, directly and quickly.
Here you will find all important data for the BTS256-EF.
News Archive 2018
Published on 19 July 2018, Author: Andreas Gross
Many applications in the UV range could until now only be realised with slow, complex, expensive, and above all large double monochromators. The systems required complex installation and logistics. Much more compact and stable structures can be realised with array spectroradiometers. Until now, the limiting factor has always been inadequate scattered light suppression in the UV range.
With the innovative BTS2048-UV-S device series from Gigahertz-Optik GmbH, a production-ready technology has been developed to overcome this limitation. Thanks to its innovative filter-based scattered light suppression and its DAkkS-traceable calibration (DIN EN ISO/IEC 17025), the BTS2048-UV-S showed very good absolute conformity over several orders of magnitude compared with an internationally accepted reference instrument (double monochromator) in an intercomparison.
The considerably shorter measurement time (a few seconds compared to many minutes) and the small size (reduction in volume by 98 %) open up new areas of application and investigation.
In addition, the new technology can be used anywhere, operating in a compact, weatherproof box with low energy consumption, meaning that the system allows for much easier solar UV and ozone measurement without major infrastructure and logistical requirements, even in exposed locations such as the alpine area (mount Zugspitze).
Other applications include radiation risk assessment in occupational safety and the measurement of UV LEDs, to name but a few.
Published on 21 March 2018, Author: Andreas Gross
The lighting industry requires high accuracy spectral light meters that can handle complex measurements. These include measurement of pulse width modulated light sources and the ability to measure both indoors and outdoors lighting, determination of thermal transient behavior of lamps, their flicker properties and so on. The primary criterion that such meters must always meet is the quality of their photometric features.
With the BTS256-EF, Gigahertz-Optik GmbH, a renowned measuring device manufacturer, offers a universal measuring device for the determination of all relevant light parameters in general lighting. The new device has been updated which includes a redesign of some of its features. Changes include the enhancement of the wavelength range from 360 nm to 830 nm and the implementation of all functions of the BTS256-E, BTS256-EF and BTS256-PAR meter.
Due to its redesign, the BTS256-EF is able to fulfill an even broader range of requirements. Its measurement features include photometric and colorimetric parameters, Photosynthetically Active Radiation (PAR) of plant grow lights, Human Centric Lighting (1), Stroboscopic Visibility Measure SVM (2), Short-Term Flicker Pst (2), and ASSIST Flicker Perception Metric Mp.
The BTS256-EF is also available with an optional Wi-Fi function.
(1) CIE TN 003:2015
(2) CIE TN 006:2016
Published on 22 February 2018, Author: Andreas Gross
The CSS-45 detector incorporates a powerful microprocessor which performs not only data acquisition but also all necessary lighting calculations. Both USB 2.0 and RS 485 interfaces are standard enabling the flexible configuration of single and multi-detector based systems. An optional software development kit supports integration into third party application software.
With its wide spectral range from 360 nm to 830 nm the CSS-45 is ideal, for example, as a high accuracy photometric and colorimetric detector (according to CIE S023). The precision diffuser provides excellent cosine correction (f2 ≤ 1.5 %). The optical bandwidth correction feature (CIE 214) further improves the quality of the spectral measurement data. Manual and auto gain settings enable a wide measurement from 1 lx to 350,000 lx for illuminance and color measurements.
The robust housing and its connectors are splash proof, and therefore suitable for use in industrial applications. A variant with protective glass dome in front of the diffuser is available. A special feature of the detector is its remote-controlled shutter, which allows a dark level measurement to be made at any time.
CSS-45 – Remote spectral detector for use in radiometric and photometric measurement setups.
Manufacturers of lamps and luminaires for general lighting purposes must consider light flicker when qualifying EMC immunity requirements. In addition to the influence of mains voltage fluctuations, flicker effects caused by the lamp and the luminaire itself must be taken into account.
With the BTS256-EF, Gigahertz-Optik GmbH, a renowned measuring device manufacturer, offers a universal measuring device for the determination of all relevant light parameters in general lighting. Combined with a LPS-CH-500 programmable AC source, the BTS256-EF becomes a comprehensive flicker test system for lamps and luminaires including voltage fluctuation immunity tests in accordance with IEC TR 61547-1:2017.
The BTS256-EF supports all current flicker measurements: Percent Flicker, Flicker Index and FFT Frequency analysis, Short term flicker severity, Pst (*), Stroboscopic Visibility Measure, SVM (*), and ASSIST Flicker perception metric, Mp.
(*) Ref: CIE TN-006.
Additionally, the BTS256-EF is a high-quality device for all photometric and colorimetric measurements of general lighting products and conditions - made possible by its special Bi-Tec sensor technology.
BTS256-EF – handheld light & flicker meter including new Pst, SVM and Mp metrics
News Archive 2017
Gigahertz-Optik welcomes Dr. Andreas Stangassinger as Sales and Marketing Director. He is the successor of Wolfgang Dähn, who will concentrate on the general management of the company.
Dr. Stangassinger, holds a PhD in Physics with a strong focus on Spectroscopy. In the past he has worked in the area of Test and Measurement, Laser and Optical Technology. Doing this, he was a researcher in the US, R&D manager of a start up company and for more then 15 years in a sales environment at last as sales director for a market leading European distribution company.
“As Dr. Stangassinger has a long professional experience, we are sure, that the company will benefit a lot and will proceed with its strong growth in the next years”, says Wolfgang Dähn (Geschäftsführung Gigahertz-Optik).
Dr. Andreas Stangassinger
Sales and Marketing Director
Released on 11.04.2017
The MSC15 spectral light meter now includes display modes for the accurate measurement of neonatal phototherapy lamps in accordance with the latest standards and guidance, irrespective of the lamp type or manufacturer. It directly displays total irradiance for bilirubin, Ebi (mW/cm2) in accordance with IEC 60601-2-50:2009+A1:2016 as well as average spectral irradiance (µW/cm2/nm) in accordance with the latest American Academy of Pediatrics recommendations.
Neonatal phototherapy is widely used for the treatment for neonatal hyperbilirubinaemia, a condition in which there is too much bilirubin in the blood. This causes a yellowing of the infant’s skin, known as jaundice. Effective phototherapy requires sufficiently high irradiance with appropriate wavelengths, generally accepted as ‘blue light’.
Optimising treatment dosimetry, agreement on best practises and comparing research have all been hindered by the large variability of measurement data produced by the many proprietary broadband radiometers employed, each with its specific spectral response and typically tailored to specific lamp or LED types. The MSC15 spectral light meter conveniently and effectively eliminates these issues.
Additionally, the MSC15 can be used to measure any light source, displaying spectral irradiance from 360-830nm as well as photometric and colorimetric data including photopic, scotopic and melanopic illuminance, color rendering indices, color temperature and CIE chromaticity.
MSC15 - Mit Bilirubin Messfunktion
Released on 29.03.2017
After eighteen years in the works CIE Technical Committee TC 2-47 has completed and published CIE 220:2016.  This technical report describes quality indices for UV radiometers, which enable manufacturers and users to characterize instruments on a common basis. To harmonize CIE documents, the quality indices described in this document relate to the quality indices described in Joint ISO/CIE International Standard ISO/CIE 19476:2014(E) (formerly CIE S 023/E:2013).
The work began in the First Workshop of the "Thematic Network for Ultraviolet Measurements" in Espoo, March 2 and 3, 1998. The Network was funded by the Standards, Measurements and Testing programme of the Commission of the European Communities, as project number SMT4-PL96-9329.
Within the Working Group 1 "Guidance for UV power meter classification for particular applications" with chair Anton Gugg-Helminger the document "Characterizing the Performance of Integral Measuring UV-Meters" was prepared. It is published in the UV news Issue 6/November2000. 
This publication was then adopted by CIE technical committee TC2-47 finishing the report in 2016.
Since UV filter radiometers very often measure light sources which are spectrally different than the light sources with which they were calibrated. As a result an uncertainty occurs called spectral mismatch error, defined as the ratio of the effective responsivity of the radiometer with respect to the radiant quantity of the test source to the effective responsivity with respect to the reference source.
UV radiometers in general are designed for various actinic spectra and different spectral ranges. So instead of only one defined reference light source spectra, CIE Illuminant A, used in photometry, three reference light source spectra are proposed in CIE 220 to support the generic spectral characterization of UV radiometers for various applications. For situations where three spectra are not sufficient for evaluating the spectral mismatch ten other light source spectra are provided in the UV News Issue 6/November2000 .
The report includes an explanation and methods for evaluating and correcting for spectral mismatch error assuming specific spectral responses are known. When detailed technical specifications are provided by the UV filter radiometer manufacturer, CIE 220:2016 information and methods can be employed to compare different meters.
Also included in the report:
- Example evaluation of a UV-A radiometer designed for UV hazard assessment per ICNIRP/ACGIH guidelines
- Short and long wavelength range response characteristics of UV radiometers and the impact on measurement results are explained
- Recommendations for UV radiometer data sheet content and specifications
- Uncertainty evaluation discussion including a list of major sources of uncertainty for UV radiometer calibration
References for CIE 220:2016
 CIE 220:2016 "Characterization and Calibration Method of UV Radiometers"
 UV news Issue6/November2000 Part A: Final report of WG1
 ICNIRP (International Commission on Non-Ionizing Radiation Protection) Sliney DH, Cesarini JP, De Gruijl FR, Diffey B, Hietanen M, Mainster M, Okuno T, Soderberg PG, Stuck B, eds. Guidelines on limits of exposure to ultraviolet radiation of wavelengths between 180 nm and 400 nm (incoherent optical radiation). Health Phys 87:171-186; 2004
 ACGIH (American Conference of Governmental Industrial Hygienists) 1992-1993 Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices ISBN: 0-936712-99-6
Vom 28. Februar bis zum 2. März 2017 präsentiert Gigahertz-Optik GmbH mit ihrer US-Tochtergesellschaft Gigahertz-Optik Inc. auf der Strategies in Light (SiL) / The LED Show ihr Portfolio zur Lichtmesstechnik. Zentrales Thema ist Messtechnik, für die lichttechnischen Eigenschaften von LEDs.
Eines der Highlights ist der kompakte BTS256-LED Tester. Dieses Handmessgerät erlaubt die Vermessung des Lichtstroms, des Spektrums, der Farbe sowie des Farbwiedergabeindizes CRI einzelner LEDs. Dies ist selbst dann möglich, wenn die LEDs bereits auf Platinen montiert sind. Die BiTec Sensor Technologie des Messgerätes in Verbindung mit einer kompakten Ulbricht’schen Kugel gewährleistet höchste Messgenauigkeit.
Als weiteres Highlight und Premiere in den USA wird das LED Lichtstrom Messsystem TPI21-TH vorgestellt. Dieses ermöglicht die Messung der lichttechnischen LED-Parameter bei thermoelektrisch kontrollierter Sperrschichttemperatur der LED Prüflinge.