Lens R&D - focus on innovationBiSon64-ET-B - fine sun sensor - GEO, MEO, ITAR free, extended temperatureBiSon64 - fine sun sensor - LEO, small satellites, ITAR freeBiSon64-B - fine sun sensor with baffle - LEO, small satellites, ITAR free, reduced albedo sensitivityBiSon6 - solar tracker - concentrated photovoltaics CPV


Lens Research and Development
is specialized in high reliability sunsensors for space and terrestrial applications
that can be cost effectively produced in larger quantities.

  • Recent Posts

    • New digital sunsensor developments to start shortly

      It is with a certain pride that we can announce to have had successful contract negotiations with ESA on another Artes contract called Digital sunsensor for telecom applications. No need to say this called for a small celebration ūüôā

      Our customers have come to expect reliable, cost effective and small solutions from Lens R&D, and the new developments of a sensor called IBIS is expected to bring exactly this. Based on a single chip dedicated sensor  (IPS) to be developed by Systematic design b.v. (represented by Richard Visee and @Gert van der Horn on above picture) the IBIS is to be a true digital sunsensor which is not affected by earths albedo and has a digital interface to the on-board computer.

      This is definitively to be seen as a new major step for Lens R&D on it’s way¬† to be a recognized player in the field of high reliability sunsensors.

      Currently this development is not including nice to haves like autonomous powering or wireless interfaces, but given the history of Lens R&D it should not come as a surprise that these issues will be born in mind while developing the imaging chip.



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    • Mechanical parts for spot-on setup arrive at Lens R&D

      Recently the  mechanical parts for the spot-on test setup have arrived at Lens R&D. Under construction in frame of an ESA GSTP program to produce and quality extended temperature sunsensors, the setup is intended to allow  temperature coefficient determination of 12 sunsensors simultaneously.


      Because the temperature coefficient will have to be determined over a temperature range of -125¬įC to +125¬įC, this can only be done in vacuum while conductively cooling the sensors. A correct measurement however also entails using at least one reference sensor which is kept at room temperature throughout the process. Last but not least, the tests will be performed at the MiVaF facility at ESTEC which uses an arc discharge lamp to generate the sun illumination signal and consequently produces a lot of 100Hz flicker. These requirements have led to the construction of a dedicated setup.

      The effect of the flicker will be minimised by using dedicated simultaneous sampling electronics which will allow to readout all 56 photodiode and 14 thermistor signals within a fraction of a microsecond.

      The unique setup will provide more insights into the quality of the ESA setup (temporal and spatial flicker noise) and will allow to optimise the calibration strategy to be followed if multiple sensors are to be calibrated for use as a coarse sunsensor. (taking all four generated currents together thus providing a single measurement value per sensor).

      Although never intended to be used as a coarse sunsensor, this mode of operation of the BiSon sunsensors is expected to give a higher accuracy than a single photodiode although with a slightly reduced field of view. Measuring 12 sensors at the same time will allow for a cost effective determination of the temperature coefficient which is needed to operate the sensors outside of the fine sunsensor mode and the simultaneous sampling will avoid long measurement times needed to take several thousands of measurements to average out the source flicker.

      Another significant investment performed to get ahead of our competition in providing cost effective solutions for high reliability Sun sensing.


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    • Merry Christmas and a happy New Year

      On the 19th of December during a small opening ceremony conducted by Kees de Boom (former TNO sunsensor business developer), Lens R&D inaugurated two dedicated cleanrooms at their new address ‘s-Gravendijckseweg 41b 2201CZ Noordwijk.

      The festivities were attended by several people partially traveling significant distances to share the joys associated with this new step in growing up as a company. With these new facilities, Lens R&D is not only capable of sustaining further growth in turnover but also capable of fulfilling all requirements posed to a company delivering products that fulfil the highest quality standards. With an ESA GSTP program running that is intended to lead to a fully qualified BiSon64-ET and BiSon64-ET-B we cannot claim to have ESA qualified products yet, but we are convinced that 2018 will not only bring us the flight qualification of the regular BiSon64-B but also the ESA qualified status for the extended temperature version.

      A remarkable achievement for such a small company as Lens R&D but enabled by the professionalism of the team and relentless support of both ESA professionals, our national space agency, friends, family and supporters (and of coarse our early adopter customers that have enough confidence in our products to use them even though not yet fully qualified)

      To all those, I would like to say:

      Thank you for all the support, and looking forward to a sunny future.

      For those  who like to know a bit more about our products or qualification status, we have all data available for download at the download section of this website and otherwise, you are always free to give us a call on our new location while using the old telephone number )+31 71 2020 123 or send an email to info@lens-rnd.com

      With best regards

      Johan Leijtens

      Proud systems engineer at and Owner of Lens R&D

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