Hi So... Hamamatsu in general seems to be damn expensive, except for the S12443: https://www.hamamatsu.com/resources/pdf/ssd/s12443_kmpd1137e.pdf For this one I found a component with integrated controller online: https://www.aliexpress.com/item/4000859822629.html I'll ask the vendor for a datasheet, because 30 Euros are the most affordable I've seen so far.
Cheers -lev
On Wednesday, January 26, 2022 10:56:32 AM WET David Lanzendörfer wrote:
Hi That's literally what I've been talking about. The idea was to build a primitive PSD from a photo diode... Hmm... But yeah. It's probably better to use a dedicated sensor. I don't have endless budget tho, and the endproduct is supposed to be somewhat affordable, so I'll check and compare prices.
Cheers -lev
On Wednesday, January 26, 2022 10:45:28 AM WET Ludwig Jaffe wrote:
Hi all
https://osioptoelectronics.com/technology-corner/frequently-asked-question s/ position-sensing-devices.aspx
Hamamatsu produces PSDs. Many photo detectors at CERN are made by Hanamatsu as well as Lead Glass and other photonic stuff.
https://www.hamamatsu.com/us/en/index.html
There should be something usable.
Also a laser can be modulated with different high frequencies and by comparing the phase between these modulated frequencies one can get the time of flight, hence the position. It should be possible to modulate a fiber transmitter for 100km monomode 1310nm fiber with a pulsecode signal and to decode the signal using the receiver of the fiber trx. So fiber trx used are quite cheap. Fiber patch cord also. So it is just a matter of how to control the fiber trx at low level and how to feet a "datastream" to it that will reveal time delays if one xors txdata and rxdata using fast ecl logic and some serdes approach.
Cheers
Luja
On January 26, 2022 7:32:09 AM GMT+01:00, "David Lanzendörfer"
leviathan@libresilicon.com wrote:
Hi What about just buying a new cheap Chinese laser diode and a photo diode and then putting a mirror onto the lense carrier, which reflects the laser diode beam back to the photo diode next to the laser diode?
Cheers -lev
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