post #3481 of 3481

Not a picture per se, but from this link you can see and research more about the first modern era optical  phono cartridges available outside Japan. 


Some might remember optical carts of the past - Toshiba C-100P - and Kenwood also had a similar unit at about the same time. 40+ years of technological advance have obviously produced conditions for reintroduction of optical cartridge. The advantages over any magnetic cartridge, be it moving magnet or moving coil, are GREAT - the most significant one is the absence of hysteresis that is a part of anything involving electromagnetic induction.


Original optical cartridges used bulbs as a light source; many bulbs (and hence carts...) died before the diamond was worn out - and at the anything but inconsiderable cost that more or less sealed the fate of optical cartridges in the market.


And then there was LED ...