může mi ta dioda poškodit oči bez použití čočky na usměrnění paprsku a bez přímého namíření do očí? jen ta otevřená dioda otočená na zeď. i to mi může poškodit zrak?

[1] Tomáš: Teoreticky by neměla. Výkon světla odražený od zdi do oka určitě nebude tak vysoký, jako při usměrněném paprsku. Nicméně bych to nezkoušel. Minimálné z toho dost bolej oči.

zdravim mějak to trochu nechápu přece laser jako projektor který svítí na parket lidem do očí tak to už je koncentrovaný paprsek a nic jim to neudělá?to já bych byl už dávno slepí protože do toho čumim furt,určitě tam je nejaký ten filtr ale přece kdyby to bylo tak nebespečné tak se z toho nebudou výrábět projektory?

omlouvam se za hrubky?bylo to na rychlo:o)

[3] marek: Ano je to koncentrovaný paprsek. Jeho výkon je ale mnohonásobně menší, protože se musí kvůli efektům rozdělit a svítí tak na mnohem větší plochu, než jen do bodu, takže se do oka dostane jen minimální výkon. Další věc jsou IR filtry, které vyfiltrují oku škodlivé infračervené záření.

nešlo by toto vytvořit s CD mechanikou nebo DVD mechanikou? Přece i DVD vypalovačka zároveň umí číst takže ten laser vypadá trošku jinak. Ale mám zkušenosti jen s CD mechanikou.Ta má mít 50?80mw výkon což není málo ale neumím ji napájet?

[6] Viktor: Na čtení stačí malé výkony, takže čistě čtecí mechaniky se použít nedají. CD vypalovačka má laser v neviditelném spektru. DVD mechanika má 2 laser diody. Jednu na DVD, jednu na CD.

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[5] H@Lu$k@: Pokud na diskotéce mají zelený LASER, žádné IR neemituje. TO nejde už z principu LASERu.