Abstract
We demonstrate a range imaging pulsed laser sensor with two-dimensional scanning of a transmitted beam and a scanless receiver using a high-aspect avalanche photodiode (APD) array for the eye-safe wavelength. The system achieves a high frame rate and long-range imaging with a relatively simple sensor configuration. We developed a high-aspect APD array for the wavelength of 1.5 μm, a receiver integrated circuit, and a range and intensity detector. By combining these devices, we realized 160×120 pixels range imaging with a frame rate of 8 Hz at a distance of about 50 m.
Highlights
1 Introduction The range imaging laser sensor,[1,2] which utilizes the time of flight (TOF) of a laser light, is a real-time remote sensor that offers three-dimensional information of scenes
We showed the concept of the range imaging pulse laser sensor with 2-D scanning of a transmitted beam and scanless receiver using a high-aspect avalanche photodiode (APD) array for the eye-safe wavelength
We developed the high-aspect APD array, the receiver integrated circuit (IC), and the range and intensity detector (RID)
Summary
The range imaging laser sensor,[1,2] which utilizes the time of flight (TOF) of a laser light, is a real-time remote sensor that offers three-dimensional information of scenes. Stettner et al.,[3] Dries et al.,[4] Vaidyanathan et al.,[5] Yuan et al.,[6] and Borniol et al.[7] proposed the “flash” type laser sensor, which has a scanless two-dimensional (2-D) array receiver This sensor acquires the range image with one transmitted beam, which illuminates the whole field of view (FOV) area of the array receiver. The aperture size of the receiving optics can be large (as long as the receiver has the required FOV) without any decreasing of the frame rate, since this sensor does not need the FOV scanning This contributes to the increasing received power of the backscattered light and enables extending the measurable range.
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