What are the best show lasers for an outdoor laser show?
Our high-end laser systems of the RTI PIKO and RTI NANO Series or of the tarm G and the tarm HD Series are particularly suitable for such events.
The RTI NANO show lasers are already water and weather-proof according to IP 65, for other laser devices we recommend special weather-proof housing like the NANO dark weather. Especially suitable for outdoor logo projections and fixed installations is the Laserworld PL-5500RGB Outdoor show laser system, as seen in the video below.
Professional laser systems usually have cooling/heating elements built inside the projector. Although these are meant for keeping the laser modules at operation temperature, the climate inside the laser device needs to be quite balanced.
If you place a laser projector next to a fog machine or next to the air condition outlet (or even to the normal ventilation system) there may be a condensation of water/liquid inside the housing due to the temperature difference. The effect is comparable to the situation if you come from a cold outside into a warm room and your glasses fog up.
That's why it is very important to place the laser system appropriately and to avoid any situation that may raise the risk of condensation.
Condensation inside a laser device may lead to short-circuit of the unit and crash of laser diodes.
Please consider the operation temperature stated in the user manual of the laser system!
A Sealed Housing technology enclosure does not prevent condensation! Please head for a even more professional system (e.g. RTI NANO or tarm HD) to reduce the condensation risk. As Laserworld has their central warehouse in Valley near Munich in Germany, nearly all products ship from there. That way you can benefit from low shipping costs and fast lead times - world wide!
It is very important that the laser light is in a good visible color spectrum as well as the diodes have a very low divergence. The beam diametre at aperture is normally not relevant, especially over longer distances.
The laser beam should have a round beam shape in all colors, so all colors match 100% and give a perfect white.
The scan speed should fit the requirement (the more complex the application, the faster scanners are needed) and the laser output power should fit the application.
A professional laser display system should be computer controllable (and should be controlled by a computer).
It is not the power that defines the quality of a showlaser system, but several other factors that dramatically influence quality and visibility.
E.g. is a DS-1800RGB even better visible than a CS-2000RGB - even though the latter has more power.
Factors for evaluation are:
- Laser power
- Laser diodes:
- Light color (wavelength): Decicive for visibility per mW power
- Type of laser diodes: Reliability and beam shape (and due to that possible limitations in beam distance)
- Quality of laser diodes as well as beam specifications: Specifications for more advanced applications
- Laser projector hardware (housing, electronics, scanners):
Laserworld has many testing stations in our central warehouse in Valley near Munich in Germany, where all our produtcs are 100% tested and a detailed quality control process takes place.
We not only test the products very much in detail, but also use the feedback in our testing range to continuously improve our products and inspire the development engineers.
In order to compare lasers worldwide, it is common to specify the effective outputpower, which is the most important criterion for objective comparison of lasers.
It is specified in Watt or milliwatt (1W = 1000mW).
Power is measured directly at the aperture of the laser source and before all optical components.
Power distribution:
Most important for the visibility of laser light is the balanced power bistribution on the base colors. A full color laser system (or: RGB system) should give a perfect balanced, white laser light. The white light can be balanced by reducing single base colors. If a single color needs to be reduced in power in a greater extent to get a balanced white, e.g. the green laser, effective overall output
power of the laser system is reduced as well. That‘s why it is very important to have the laser components in a projector at harmonized power. Especially important are the wavelengths of the individual colors.
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The human eye perceives the different wavelengths of the visible color range with a different intensity. The optimum is at 555nm - the green DPSS as RGB elementary color meets this as the most closest.
Therefore it is decisive to find the perfect balancing act between best power distribution and largest green part in order to match the best possible visibility.
The closer the nanometer is to this optimum (up and down), the brighter is the perception of a color. However, this visibility curve looks not like a common „bell“-curve and therefore brings special characteristics in the blue and red color range with it.
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With a full color solid state laser, (at least) three different laser modules are used together. White light as well as mixed colors are generated by the additive color mixture of red, green and blue (like e.g. the TV set). Color shades are produced with the partial switch-off or the dimming of single colors, which is so called "analog modulation".
To increase output power or to create a larger or more vivid color range, it is possible to mix even more than three colors (e.g. we do so in most of our RTI NANO systems). It needs some knowledge to operate such systems properly.
The wavelengths of the individual laser modules define the color. That's why it is very important to have the "right" red and the "right" blue to get good visibility with a good color spectrum at the same time.
Following video explains the differences between TTL modulation and analog modulation:
European customers get their parcels DDP (Deliver Duty Paid), meaning that Laserworld does all the import handling and customs clearing: You purchase just as if you purchase from somwhere else in Europe. No extra duties are charged to you.
DDP shipments are only possible to customers with valid VAT ID.
Laserworld always ships Express - except for Germany, but on request we´ll ship express here, too.
Due to the high parcel volume, Laserworld gets very good shipping conditions at all. As Express shipment costs are quite the same as standards shipment, we're proud to be able to offer you Express shipment without additional costs.
Laserworld´s central warehouse is located in Germany and our European customers benefit from that: as we deliver our products through intra-Community trade you don't have to pay VAT (applies for commercial customers with VAT ID, not for customers from Germany). In combination with our quite affordable shipping costs and our extremely fast shipment to Europe (normally only one day) this is a huge advantage for our European customers.
It is physically not possible to give exact power values of show lasers, as several factors influence the power.
Especially DPSS (Diode Pumped Solid State) laser modules are quite sensitive to exterior influences like temperature and excessive shock.
DPSS modules consist mainly of three sections:
- a pump energy source (where there may be slight differences in power),
- a resonation area (that consists of two reflection mirrors that must be absolutely parallel - small deviations lead to reduced output)
- a crystalline structure as laser active material (which is naturally grown and thus may differ in quality).
As it can be clearly seen there are several physical cases for haveing differences in output power - even if the lasers are built the same way. Other influences come from optical components like lenses etc and from the electronics components.
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