For triangulation distance measurement Hamamatsu offers a new photo IC. Operating at 5 V, the 58030 is available with a 4-pin SIP (5 x 5 mm) or surface mounted SOP (4,5 x 4,5 mm) package.
The dual photo IC consists of monolithic integrated voltage regulator, oscillator, timing generator, LED driver, two-channel photodiode, preamplifier, comparator, signal processing circuit and open collector output. Detection is based on the output ratio between the two channels of the photodiode. Compared to conventional dual photodiodes, this photo IC allows stable operation even at high ambient light exposure because of background light suppression.
When a light reflecting object enters the preset range and is detected by two consecutive LED drive pulses, the output turns 'off'. Response time for first detection is 443 ms, then output status is refreshed every 224 ms. Due to its visible cut filter, S8040 works best with an LED emitting at 850 nm.
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