SAFETY Systems
FOREWORD
From the end of 2013, all the Laser Embedded Laser Harp we craft, are classified as Class IV Laser devices.
This means that they follow safety standard, which we applied also in the old Class 3b products in the past. Even if it was not required for 3b classes.
On top of all, they must be used only from specialized person and/or the musician that has to play with, must be very careful and read out, understand, all the Safety recommendations are written also on the Manual given with the devices.
Her/his behavior is expected to be very strict to what the Manual declares and even more severe than it, but certainly not lighter than that.
Taking into consideration that our Laser Harps are Musical Instruments and not devices that should be used for other purposes than this or in dangerous environment (e.g. with explosive gases etc), the safety systems installed, should be able to protect the personnel, and at the same time permit the use tf the Laser Harp in the goal they are designed for.
LASER HARPS by KROMALASER are PROFESSIONAL MUSICAL INSTRUMENTS
The laser Harps we craft, are intended to be used as Musical Instrument and the Musician/DJ plays them, should have read the Manual with all the instructions and warnings
From the moment you receive the Laser Harp, you are the person that's aware about all what concerns the instrument and the way in which you handle it, because clearly reported into the documentation we release together with the Instrument
SIGNALIZATION
All the parts of the laser Harps which are hazardous, are clearly signaled by conventional/standard labeling placed just aside that zones.
Please take care to these signalization/labeling and respect them carefully.
Those labels and the danger notes are also reported into the manual.
FORBIDDEN TO OPEN THE DEVICE
In all the nations of Europe (EU), there is the application of what is called "Common Sense".
To enforce this, we seriously declare here that's strongly forbidden for any user, to open the device for any reason.
The opening of the device, is admitted only by Laser technical Specialist personnel.
We strongly encourage you to send your Laser Harp, in case you need any reparation's intervention, directly to our Laboratories.
We are not responsible about any damage against persons/animals/things, if you violate any of the requirements expressed above, hereby, and into the manual.
REFLECTIONS
Laser beams must never be pointed toward any reflective surfaces, that can point them toward the eyes/body of any living being.
In case of white Ceiling, we always suggest to put a black tape or not reflective surface, in the ceiling's zone where the lasers are pointed.
We are selling the tape in our Accessories section.
On stage, take care that laser are going directly into sky or they are not reflected by any surface like the scaffold or else.
If you use the SkyCeil to create the spectacular Laser Ceiling, you are responsible to prevent that the deflected Laser Beams, are hitting any living being/reflective object.
MIRRORING for UPRIGHT LASERS
The use any not-Kromalaser Laser Projector with ILDA Controller to have the Laser Harp, implies the installation of external 45 degrees mirrors to deflect the laser beams, so that they become vertical
This manner to use the projector, suggested or indicated by other companies, is very dangerous. Indeed a simple misalignment of the mirror, due small accidental movements on the Stage or else, can hazard the eyes of the public.
To avoid this, we have designed and built special projectors, that have the mirror system internally installed and carefully set up. So that our projectors are really safe
With our projectors, you have the warranty that lasers beams are always emitted upright, and you don't need any external mirror, hence you have not to worry about vibrations or movements when you are on Stage
KEYLOCK
Each Laser Harp, with laser projector embedded, have a Keylock system, that interdicts the device in case the key is not inserted and turned.
Who has the key, is the formal responsible of the use of the harp.
When the key is out, or is placed in but not turned, there's no way to activate the Laser Harp
INTERLOCK CONNECTOR
The remote interlock connector Class 4 lasers should be connected to an emergency master disconnect interlock or to room, door or fixture interlocks.
We provide this connector as it's required on any Laser 4 device ( IEC 60825 )
KEYLOCK ENFORCEMENT and INTERLOCK ENFORCEMENT
FOOTSWITCH LOCKING SYSTEM (the enforcement)
Safety norms are just describing the requirement to have a keylock. We did more.
Since the beginning, we have enforced this requirement, applying the necessity to press contemporaneously the pedals 1 and 4, to activate the lasers.
This, together with the keylock, avoids accidental turns on, by personnel which is not supposed to have access to the Laser Harp, nor to it's use and handling.
TILT SENSOR
Reasons:
Light weight instruments, can by tilted down/flipped by rough use (by a strong kick for instance).
While the heaviest ones, due an not attentive use during the setup of the stage.
It means that there is the risk that the laser beams are reaching the eyes of any the people and this must be avoided.
Norms are prescribing the interlock system, which deactivates the lasers by disconnecting a plug or pushing an emergency button.
What the TILT SENSOR does as INTERLOCK ENFORCEMENT:
The interlock foreseen by norms has a dangerous drawback: it takes too long to be activated, and lasers are damaging eyes in milliseconds.
To be more effective than what norms are suggesting, our Interlock system is a tilt sensor.
Indeed our laser harps must be used with lasers coming out upright, in vertical!
Or at an angle determined by the laser Fan itself, which we established during manufacturing process, which has not any risk for accidental laser hit (anyhow you should always take care for!)
For the reasons above, if ever the Laser Harp is bumped, with risk of tilt, and/or tilted the laser system and the whole circuitry goes immediately off, avoiding any accidental possible contact with the eyes of any body surrounding it.
At the same time an acoustic alarm turns on and the only one way to reset the Laser Harp restarting the lasers, is to put the laser harp in its working position, as foreseen by its Manual, to unplug and re-plug the power by the mechanical switch.
This solution is much more effective and quick than any pushbutton in the world, and it's meant to protect you much more.
We placed the Tilt Sensor also in the projectors we are crafting and selling, for Laser Harp as Musical Instrument Purposes
COVER LOCK
In certain cases, especially when the Laser Harp is more portable, thus subjected to be easily handled by not so expert personnel, there is a cover with 2 locks.
Closing it when the instrument is not used, as recommended, with the keys we give when we ship the laser harp, prevent access to the harp itself.
Who owns the keys of the laser harp is formally responsible of any damaged caused by any imprudence
GOGGLES
Goggles are special protective glasses. they are NOT Sunglasses, thus please do not make any confusion amount the two types of glasses!
The following items are the feedback of the major certified goggles manufacturers
Goggles are made with special lenses that are attenuating only a specific wavelength.
Moreover they are not meant to protect you against long direct contact between your (or third parties) eyes and the lasers.
They are meant only to protect against brilliant reflections of the lasers (accidental hits) which can accidentally reach your or third parties eyes.
moreover, goggles are generally made to protect against one specific wavelength, thus only one color.
There are goggles protecting against two colors, which are very expensive and very difficult to find and to order. But if you ask for, we can order them
Multicolor goggles, made for three or more wavelengths at the same time, are not existing in the world, because they are very difficult (almost impossible) to be built. So far goggles are not employable for this application, because whenever thy are built, the y are so dark that are not usable for these application. Indeed, because the human visible spectrum lies between 380-780 nm, to protect from all the radiations, you need a totally non-transparent material. black. Thus on rainbow effects etc, you are using the whole visible radiations and you need to see the lasers in order to use them. Thus it's physically impossible to build such kind of goggles: which protects you, but permits you to watch the lasers
With CLASS IV to protect your eyes is MANDATORY But the current norms are not specifying the degree of protection and/or the wavelength on which the glasses should protect your eyes
To protect your eyes, be attentive, careful and applying your common sense.

Discover the inventor of the Bi-Color Laser Embedded, and Multicolor 3D Laser Harps
A small journey into the Story of the designer of this particular musical instrument

Laser Harp: is what you are looking for? The ones we craft, are the ultimate and portable ones!!
Let's explore their main features.
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Maurizio Carelli is the creator of all the Laser Harps you can see in this website!
Since his childood, Maurizio Carelli is a great Fan of the French musician: Jean Michel Jarre.
Maurizio has all the discography of Jean Michel Jarre and since this composer started to use a "self crafted" Laser Harp, Maurizio felt immediately in love with ...
You know the Laser Harps of Maurizio Carelli and you know Kromalaser. But artistically talking: who is Maurizio Carelli? He’s not only the creator of Kromalaser‘s Laser Harps. He has also a quite great experience and career in the Musical Sector. Here below the summary of his Curriculum.
1974-1980 – Studied Piano under the guidance of M. Malabarba, Organ-player in the “Duomo di Lodi” (italy)
1980-1990 – Started to compose music and songs. At the same time he playd in a band called “La Base” located in Trento (italy), as Keyboard-player
1989 – Graduated in Electronics and occasionally collaborated with several groups inthe province of Lodi (italy)
1990-1993 – Maurizio composed a piece of music for the Theatric Show “Creando”. It’s an ensemble of electronic and acoustic music, dance and paint. Moreover he had collaborations with several local artists
1993-2000 – Created the National Match “Primo Traguardo” for interpreters.
As Record Producer, he’s being director of Regson Studios in Milan (italy) where prestigious National Artists recorded their Records as: Fabrizio de André, Milva, Natale Massara, Pino Donaggio, Elio e le Storie Tese and several other ones.
Maurizio was the founder of Rima Records and Unigroove Records. He had artistic collaborations with Raffaella Destefano, Nello Daniele and other ones.
As Producer, directed the production of: Frau Zimmermann, B29, Pino Scotto, Ida Rendano, Maurizio Salerno
2008-2009 – As Composer and Arranger, Maurizio was working with the musical project “Fogne” by Cristina Barnasconi.
Laser Harp Kromalaser
We designed several models with laser embedded as well as ILDA Controllers.
The Laser Harps Kromalaser are amazing musical instruments, that will lead your performances into the magic of light and sound. Just plug your Laser Harp into your Synth or PC and play. Feel the sound of the light in your hands!
Since 2008, indeed, we build, sell and distribute Bi- and Multi-Color laser harps with embedded laser projectors. Truly Plug-and-Play and portable, our Laser Harps give you the full control of your performance (by M.Carelli CEO) ...
Simply use your hands to touch the rays of light to achieve a high quality polyphonic sound, just like Jean-Michel Jarre did, during his historical concert in China in 1982! What is a Laser Harp? Here is the Wikipedia def:
In other words: a Laser Harp is a “cordophone” whose strings are made by light beams. Kromalaser's Laser Harps are industrially crafted devices that make them into the most powerful, portable and flexible Laser Harps ever made. No matter where your gig is, your living room as well as on stage.
Having an unframed structure, the laser beams of these Laser Harps can be projected to the sky creating spanning up to 2km (6 562 ft) high with min. 300mw green laser power and in skyclear conditions. You can also reflect the light beams and create a gigantic Laser Light Roof above your astounded audience, by tilted mirrors reflecting the rays through: SkyCeil!
LASER HARP: EASY WAY TO PLAY

Wear your white gloves, touch a laser beam. The light sensor UltraSENSOR™ intercepts your hand position and the matched MIDI note code will flow straight into any MIDI instrument through the MIDI-Out port.
All KROMALASER's Laser Harps are designed to drive any kind of electronic or virtual instrument (VST). Activate sequencers, dim lights and anything your creativity brings forth: you can do this all by touching a pure laser beam.
POWERFUL new Standard in LASER HARP

Laser Harp beams projected toward a 2kms far away mountain
Your Performance at the first place!
From 1000mW up to 6W standard and up to 100W on request. Great power for terrific, gorgeous concerts, for any kind of audience. Nobody can have more!
Even Jean Michel Jarre could dream for it. Already from the basic model of the Laser Harp KROMALASER , the power of the laser beams is enough to be seen very far away. In the picture aside you can see the laser beams to the top of a mountain 2km (6 562 feet) far, in SkyClear night condition.
The Story of KROMALASER's projects starts on July 2008 when Maurizio Carelli wanted to design and build a low cost laser harp that can be easily transported and can be easily played on stage. Be very aware about the issues that Jean Michel Jarre shown to have with his own Laser Harp, which are causing freezing and out-sync during some concert, Maurizio wanted to create something, namely: Reliable, Rugged, and Stable Something which is definitely easy to use by everyone. The only one way to achieve this goal, was to design a device which is exactly on that way. The first prototype of Laser Harp was made with the tool FischerTechnik (a “Lego like” toy). This was used to build the main support. It was just the begin of the great adventure toward real professional devices. Here aside, in the picture, is shown the first green laser scan test, where it gives immediately the idea of the harp plaid by Jean Michel Jarre A special testing board was built in order to measure: beams aperture, laser power and sensitivity calibration. The galvanometers are driven by a very fast micro-controller Honestly, the most difficult part of the Laser Harp project, was the hardware engineering. The engineer Ceresini, worked hardly on 3D C.A.D. in order to design the final mechanical support. The very first Kromalaser’s Laser Harp has been really hand made. These processes carried the Laser Harp to the final stage. A very rugged, reliable and powerful system for your performances on Stage. After months of testing, the Laser Harp have been used on Stage, in an official performance taken on February the 27th 2010, during WIRInMilan show. At that point in time, Mr.Carelli made the very first official Kromalaser's website, to introduce you this great device! In 2010, due an important meeting with one of the most known italian musician, producer and DJ: Roland Brant, a definitive improvement to the Laser Harp has been made, making the Laser Harp KL Professional to coming to life, The improvement is: the UltraSENSOR. The UltraSENSOR makes possible to play the Laser Harp even in daily light or with stage's artificial lights. On July 2010, after this achievement, Maurizio Carelli designed and crafted the ILDA Controller which was called: KL-Kontrol. By this ILDA Laser Controller, it’s possible to create Laser Harps just by using all the Laser Scanners on market. The big advantage of KL-Kontrol, is that’s possible to create Multi-Color Laser Harps, with a great variety of optical effects. Just an example: by changing a simple set-up, colors are changing dynamically following the rhythm of the music, creating a very high psychedelic effect and keeping the distinction between: Diatonic and Chromatic notes The KL-Kontrol was followed by the KL-Dee Jay, with which the Laser Harp could be driven by a Synth or a PC. Both KL-Kontrol and KL-Dee Jay, were the very honored ancestors of the actual KL-KONTROLITE in all its variations. In 2011 it was started another important project, which was introduced on market in 2012: KL-3D "EXTREME" which is the very first 3D Laser Harp in the world! With the 3D EXTREME, the Laser Harp world is bound to have a dramatic change, making all the conventional Laser Harps in the world market: obsolete! With this device, the IV generation Laser Harp have began A new product chain started, and all the old products are dismissed. Today KL-3D 1000 is a powerful laser harp which has a power of 1W in total, it has 3 laser beams (RGB) and it's 3D. It substitued the old KL-450 BASIC and PLUS KL-3D PRO it's a very professional musical instrument with Touch Screen as well as our ILDA Controller KL-KONTROL EVO HHMC is a new system developed exclusively by KROMALASER in order to modulate each laser beam with the vertical movement of the hands No limits any longer on our horizon. The old fashione Laser Harp of Jean Michel Jarre, now definitely appertains to the dinosaurs' Era Kromalaser continues to improve its products and enhances its catalogue to offer you the best Laser Harps ever. |
![]() The very first Laser Harp |
![]() Mr. Ceresini milling the hardware of the laser beams' mixer. | |
![]() UltraSENSOR (External Type) | |
In this video, the KL-KONTROLITE | |
In this video: 3D EXTREME |
We’d like to thank the following fellows for their great collaboration:
Ina COSTIUC – Russian Translations and Romanian Translation for external services of the Website
Alicja JARZABEK – Polish Translations for external services of the Website
Paolo BASSETTI – English Translations
Rémy TOURBIEZ and Elena BIANCARDI – French Translations
Tiziano DEMARIA – English/italian Translations, Website design & programming, graphics, info-graphics realizations, voice-over, IT and Program Management.
Wladimir TRINASTICH and Yan TERRIEN – Important suggestions to develop more our products’ chain
Bernard SZAJNER – Important suggestions to develop upright octaves system and for his collaboration with us