| 摘要 |
<p>An infrared sensitive photodiode (22) having a relatively large optically active area and relatively low capacitance comprises a stripe diode (42) adjacent an optically active area having a thick infrared transparent field oxide (48) over a lightly doped channel stop (46). The low capacitance photodiode is particularly useful in a range finder device of the type having means for projecting a beam of light (14) to illuminate a spot on an object in a scene, and a linear array of photosensors (18) for detecting the apparent location of the spot in the scene to determine the distance to the object. An improved range finder of this type has an infrared LED (10) with a long narrow beam cross section and an array of stripe photodiodes (22) having shapes similar to the shape of the beam cross section.</p> |
