What Type of Photo Diode? - CR4 Discussion Thread

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Anonymous Poster	What Type of Photo Diode? 01/29/2007 12:41 PM
	what is the suitable photo diode that I can use for a Helium-Neon laser, since i am going to measure the vibration of a vibrating string whose diameter is just 0.25mm. This wire is used to measure the viration of the string which is used to cut the metals in Wire-cut Electric Discharge Machining.
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rcapper Guru Join Date: Dec 2005 Location: Etats Unis Posts: 1871 Good Answers: 45	#1 Re: What Type of Photo Diode? 01/30/2007 12:07 AM
	Since the wavelength of a helium-neon laser is 632.8 nm you will need one that is sensitive to visible red light and that is not special. To register the vibration you may need to use an aperture of appropriate size for the motion of the wire to modulate the signal. You may also need a filter to attenuate the signal to an appropriate level. __________________ The hardest thing to overcome, is not knowing that you don't know.
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You might be interested in: Diode Arrays, Diode Lasers, PIN Diodes

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