To buy the right show laser, you should know their requirements for their new show laser. In the following, we provide you with the basic knowledge to make the right choice yourself..
In order not to scare you with too much information, we limit ourselves to the essential criteria of a show laser, which you can also comprehend.
Beam quality - how important is it really? And who needs what quality?
Scanning speed - how fast does my show laser need to be?
Output power - how much may or must I have?
Show laser safety - what do I have to look out for?
Show laser quality - how important is it really? And who needs what quality?
Whoever wants to output laser beams and make them visible through fog, for example, does not need a high-end laser with particularly good beam quality.
However, who wants to output graphics, for example on a projection fabric (laser gauze) or a house wall, will very well and clearly see a difference. Especially the further away the laser is from the projection surface.
The beam quality of a show laser is characterized both by the size of the laser beam, but especially by the divergence. The smaller the laser beam, the brighter it is. Furthermore by the color mixing ( modulation ), which allows to display basic and mixed colors. Output different shades of orange on your laser... they will quickly find out what your show laser can - or not!
Scanning speed - how fast must my show laser be?
A widely known show laser effect is the tunnel effect. This effect can be output by pretty much any laser without any problems - no matter what the scan speed of your show laser is! The tunnel effect is nothing else than a circle that opens and closes if necessary. This circle consists of only "one" closed line, which is easy to display for every show laser. Exactly the opposite represents a text output. We get calls again and again where it is said that my laser should "only" output a text - nothing more. But exactly here scan speed is in demand and so some Showlaser owner experiences his blue miracle.
. Imagine the letter "H" from "HaLLo". This consists in most Showlaser fonts, already from 4-6 completed lines - ( to the memory - the tunnel or wave effect consists only of a line ). Only the letter "H" is therefore 4-6x as difficult for the scanner in your show laser to display as a tunnel effect. Now imagine that you want to write "Welcome to our company! Don't be surprised if it suddenly flickers as if someone has switched on a flashlight! The scanners of many show lasers already come with this saying "far" beyond their limits.
If the spectators look in the direction of the show laser at beam effects, you need far less scan speed than if you look with the direction of the show laser at a wall or a projection medium and output texts or graphics there.
In the laser industry, there are many claims about the speed of a scanning unit in the show laser. Here you can easily be blinded, because the speed alone ( for example 40kpps ) is "not at all" meaningful. Often missing here is the indication at which output angle this speed can be achieved. For this reason, the standard ( "at ILDA 8Â°" ) was introduced. Only in connection with this indication speeds of scanners can be compared seriously!
If you are 5m away from a wall with your showlaser and project a 1 x 1 meter image, this is obviously easier for your scanner than if you were to project a 10 x 10 meter image. Even if you set 40kpps of speed in both cases, you will notice a significant difference when it comes to "the judder" or "the exact reproduction" of the image. After all, the scanner has to display an image 10x as large at the same speed!
At this point, then, the differences that distinguish good scanners from not-so-good ones become clear! Not for nothing there are 40kpps scanners for 200, 500 or even 1500 euros. The output angle at which the speed of a show laser is achieved, is the magic word here that is often "forgotten" in the one or the other offer or the angle is given only "half as big".
In practice, it is then often so that no one wants a flickering image, so the scan speed is set higher than the scanner can actually do. In fact, the image then becomes quieter, but also "distorted"! In addition, the scanner lives so not all too long. So: Eyes on when buying a scanner!.
Output power - how much may or must I have?
At this point, it is first important to know the following about the brightness of a show laser:
In addition to the output power, there are two main factors that are responsible for the effective brightness. The "beam diameter" and the "beam divergence". The output power alone is not meaningful. We explain here in 3 sentences why this is so:
If we increase the power of a laser module by twice, we get about 1.5 times the brightness.
But if we take the same laser module and reduce the steel diameter by half, we get a brightness increase by a factor of 4 !!
That says a lot! The divergence of a laser gives thereby information about how much a laser beam increases its beam diameter with continuous distance.
In other words: Throw times a laser image after 20m, 50m or 100m on a wall. You will immediately see how much divergence matters.
It's not really unusual for a 5W laser to be less bright than one with 3W output power.
How much power you actually need cannot be seriously conveyed here. For this we need more information, where the laser is used, what should be output and what distances to the projection medium, or to the audience. Outdoor / Indoor / Haze...
Of course, the output power for audience scanning ( i.e. direct irradiation of spectators ) must always comply with safety regulations and must not exceed the MZB values. Please do not hesitate to contact us. We will be happy to give you the necessary info along the way, so that you know the distances you need to keep with our show lasers.
If you want to output graphics and texts on a wall or a projection medium without the spectators in the output area limiting the performance of the laser, they pay particular attention to a good (i.e. low) divergence. Then you don't have to be 2m away from the wall to have a nice, clean and bright laser output.
In collaboration with Kvant Laser, we have created a video comparing different outputs, from different distances. Take a look!
Show laser safety - what should I look out for?
We have dedicated a separate page to this topic. You can also find it overleaf.
What I can say at this point is that all of our show lasers comply with European standards and safety regulations.
A professional consultation makes all the difference!
Despite all the information we give you on this page about show lasers, we strongly recommend that you seek professional advice before making a purchase. The setup and output situations for show lasers are so individually different from user to user that you can only make a good recommendation based on the information from the customer.