An RGB Laser And Its Applications

By Cornelia White

An RGB laser is that beam source that emits red, green and blue lights in form of laser beams either as a separate beam for each color or a combination of all the three colors in one beam. Through the process of additive color mixing which is achieved through combination of these lights, a number of many other lights can be obtained.

Arc lamp sources are now being replaced with RGB lasers for light emissions, particularly given that they are much better when it comes to performance as compared to the arc lamp beamers. Arc lamp beamers are known to be the cheaper alternatives but they have limited lifetime, poor image quality and impossibility to achieve high wall-plug efficiency.

Beams from these sources are known to be coherent in both wavelengths, both in time and space allowing for inferences. If the change in phase properties is able to take place at the same time over a long distance and at the same period of time, then such waves will produce a very clear image. It is possible to cancel such waves with a similar with opposite phase.

These lasers are known to produce beams of the three primary colors with very narrow optical bandwidth making them close to the monochromatic light beams. They are thus capable of producing very clear images on mixing, the reason why they are getting more application like in cathode tube displays, color printers and lamp-based beamers.

RGB sources however suffer from a major setback given that the power level that is emitted is usually of low level. Most cinema projectors for instance require up to 10 W per color or even more. This level of power sufficiency, maturity or even cost effectiveness is still beyond the existing RGB scanners. When it comes to beam quality, these machines have to operate with high quality beams for them to perform effectively.

This are at times fitted with power-modulators particularly in the instances where the use of optical modulators is not practical due to low-power miniature devices. This is done to achieve better signals and laser diodes are used in most of the occasions. These particular diodes help achieve increased bandwidth to tens or hundreds of megahertz which in turns significantly improves resolutions.

There are many methods of constructing RGB lasers. Three lasers with each emitting a particular light of a wanted color is for instance an approach that has been used for long. These visible light beams are however limited in performance as compared to those that are infrared based.

The other method is the use of an infrared solid-state laser where a single near-infrared laser generate a single color that then undergoes through different stages of nonlinear frequency conversion to produce the three colored beams. There are many other schemes of producing the desired wave lengths such as through combination of parametric oscillators, some frequency mixers and even frequency doublers in addition to other methods.

Technological advancement is however set to completely address the challenges in with an RGB laser. Just like other forms of lasers, they are set to be used in all other areas where there are need for lasers like in hospital machines, cutting technology and in entertainment industry among others.

About the Author:

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Its The Mental Illness

D.J. Jaffee has a column at National Review Online about the woman who tried to ram her way into the White House.  Her boyfriend (and the father of the one year old who was in the car when police shot her to death) had made attempts to get her help for her mental illness:

According to CNN, he “contacted police in December saying he feared for the safety of their child, who was 4 months old at the time. The boyfriend said the woman was acting delusional, claiming the president had placed Stamford under lockdown and that her house was under electronic surveillance.” He thought she had post-partum depression, but police found medications for schizophrenia, bipolar disorder, and depression in her home.

The most likely scenario is that Miriam was not taking the medications or they weren’t working. Either way, someone who was dangerous was on the streets.

We know how to stop this. What we need is mandatory and monitored community treatment for those known to have serious mental illness and a history of dangerousness, incarceration, or needless repeated hospitalizations.

He then goes on to discuss assisted outpatient treatment, a step in between doing nothing at all, and involuntary commitment.  This has been in most places that have implemented it, an effective strategy that reduces self-harm and harm to others.  Unfortunately, Miriam lived in Connecticut, a state where such a law was considered by the legislature in 2012, but the ACLU vetoed it.  We know that Adam Lanzas mother was attempting to get a guardianship over her son at the time Adam murdered his mother, then all those kids at Sandy Hook.  Would this law have helped her in her efforts?  Its hard to say.  But we can say that the continual screeching by the mainstream media about gun control -- while ignoring the larger problem of mental illness with mentally ill people running amok with cars -- is accomplishing nothing at all.

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