QD7-0-SD or QD50-0-SD are quadrant photodiode arrays with associated circuitry to provide two difference signals and a sum signal. The two difference signals are voltage analogs of the relative intensity difference of the light sensed by opposing pairs of the photodiode quadrant elements. In addition the amplified sum of all 4 quadrant elements is provided as the sum signal. This makes the QD7-0-SD or QD50-0-SD ideal for both light beam nulling and position applications. Very precise light beam alignments are possible, and the circuit can also be used for target acquisition and alignment.
| OSI Optoelectronics | |
|---|---|
| Product Category | Photodiodes |
| Product Number | QD7-0 |
| Product Name | Quadrant / Bi-Cell Photodiode |
| Photodiode Type | PIN Photodiode |
| Photodiode Spectral Response | Visible; IR |
| Spectral Response Range | 350 to 1100 nm (3500 to 11000 Å) |
| Photodiode Material | Silicon |
| Photodiode Package | 41 / TO-5 |
