Since ancient times, people believed that rays of light carry grand and mysterious powers. Interest in radiation redoubled around the start of the 20th century with the discovery of radio, X-rays and radioactivity.

A whole spectrum of radiation opened up, with wavelengths longer or shorter than light. What amazing new uses might be discovered for use in medicine, communications, scientific research — or warfare?

Radio was soon put to use, but the same techniques could not be used with radiation of shorter wavelengths. A method for amplifying light had its origins in an idea Einstein developed in 1916. Looking deeply into the new theory of quantum physics, he predicted that rays could stimulate atoms to emit more rays of the same wavelength.

But engineers had little notion how to manipulate atoms, and for decades the idea seemed a theoretical curiosity of no practical interest. Scientists and engineers pushed radio techniques to ever shorter wavelengths. In the 1930s some hoped they were on the verge of creating a “death ray”. That turned out to be unworkable, but the effort led to something better — radar. By 1940 ingenious devices could generate rays with wavelengths of a centimeter or less. They were swiftly pressed into service to detect enemy airplanes.

By the start of the 20th century, scientists understood that light rays could be thought of as electro- magnetic waves — similar to radio waves, but with much shorter wavelengths. A spectrum chart shows various forms of electromagnetic radiation.

The only difference between one ray and another is the length of its wave. (We can also say the frequency is different, the frequency being the number of waves that pass a point each second as the ray moves through space.)

The spectrum is drawn so that the wavelength is reduced by a large factor at each major division. Thus visible light rays are 1/100,000 the length of "microwave" rays commonly used for radar. Rays with shorter wavelengths can carry more information and more energy.


Scientists boasted that radar had won the war and the atomic bomb had ended it. What might physicists create next?  As the Cold War against the Soviet Union got underway, the US government poured ever larger funds into basic and applied research.

Scenting not only military but civilian applications, corporations and entrepreneurs heaped their own money on the pile. Industrial and university laboratories proliferated. It was from this fertile soil that the laser would grow.

Straalwapens bestaan in de werkelijkheid maar kwamen oorspronkelijk voor in het sciencefictiongenre.

In sciencefictionboeken, -televisieseries en -films zijn dergelijke wapens onder andere bekend als hittestralen (The War of the Worlds; in het Engels: heat rays), ray guns, death rays, fasers (Star Trek; in het Engels: phasers) en blasters (Star Wars).

De Lairessestraat 59   1071 NT   Amsterdam   020-679 71 55   omca@me.com   www.omca.nl

Oogziekenhuis OMC Amsterdam

Retina Regeneratie Therapie 2RT

Vrije Artsenkeuze

Farmacotherapeutisch Kompas

Algemene informatie

Anatomie en functie

Baby’s Eyes

Brilcorrectie

Contactlenzen

Fundoscopie

Gebruik oogdruppels

Gezichtsscherpte

Hulpmiddelen slechtzienden

Oogdrukmeting

Oogheelkundig onderzoek

Oogschade door alcoholgebruik

Oogschade door ongevallen

Oogschade door roken

Oogschade door zonlicht

Orthoptisch onderzoek

Spleetlamponderzoek

Onderzoeken

Cornea topografie

Fluorescentie angiografie - FAG

Gezichtsveldonderzoek - FDT

Gezichtsveldonderzoek - GVO

Glaucoomonderzoek - GDxPro

Macular Integrity Assesment - MAIA

Optical Coherance Tomography - OCT

Ultrasonografie - USG

Visual Evoked Potential - VEP

Laser algemeen

Lasertechniek

Laser medisch geïndiceerd

Laserbehandeling oogziekten

Koude Nanosecond Laser 2RT

Neodymium YAG Laser

Photodynamische Therapie

Selectieve Laser Trabeculoplastiek

UltraQ Microsurgical Laser

Laser niet medisch geïndiceerd

Consensus refractiechirurgie

Ooglaser advies

Ooglaser complicaties

Ooglaser complicaties websites

Aandoeningen

Aangezichtsverlamming

Achterste glasvochtloslating

Amblyopie

Blepharitis-onstoken oogleden

Blepharospasme

Cataract - staar

Chalazion - zwelling ooglid

Conjunctivitis - bindvliesonsteking

Droge ogen

Enucleatie

Glaucoom

Glaucoom onderzoek

Herpes simplex

Herpes zoster

Hoornvliesafwijkingen

Hoornvliestransplantatie

Iridotomie

Iritis - uveïtis

Keratoconus

Kleurenzien stoornissen

Maculadegeneratie

Maculagat

Maculapucker

Melanoom

Nastaar

Netvliesloslating

Nystagmus

Oogafwijkingen bij AIDS

Ooginjecties Anti-VEGF

Ooglidchirurgie

Ooglidtumoren

Oogmigraine

Opticusatrofie

Opticusdrusen

Opticusinfarct

Opticusontsteking

Opticustumoren

Prematuren retinopathie

Pterygium & pinguecula

Refractie-brilafwijkingen

Retinitis centralis serosa

Retinitis pigmentosa

Retinoblastoom

Scheelzien-strabismus

Suikerziekte en het oog

Trachoom

Tranende ogen

Vaatafsluitingen in het oog

Vitrectomie

Vlekken en flitsen

Ziekte van Graves