&lt;title&gt;Research progess on scannerless ladar systems using a laser diode transmitter and FM/cw radar principles&lt;/title&gt;

Stann, Barry L.; Abou-Auf, Ahmed A.; Frankel, Scott; Giza, Mark M.; Potter, Walter D.; Ruff, William C.; Shen, Paul H.; Simon, Deborah R.; Stead, Michael; Sztankay, Zoltan G.; Lester, L. F.

doi:10.1117/12.440102

Cited by 5 publications

(2 citation statements)

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“…ARL is researching scannerless ladar systems that are based on a unique FM/cw ranging architecture previously reported 1,2,3 . In the FM/cw laser-radar architecture, a chirped radio frequency (RF) local-oscillator (LO) signal applied across a metal-semiconductor-metal (MSM) detector array is mixed with a backscattered light signal that is amplitudemodulated by the chirp signal.…”

Section: Introductionmentioning

confidence: 99%

High-gain 0.8-μm CMOS readout integrated circuit for FM/CW line-imaging ladar

2003

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We are engaged in research of readout techniques and development of readout integrated circuits for active and active/passive imaging systems under development at the Army Research Laboratory. Here we report a readout integrated circuit chip designed for ARL's FM/cw line-imaging ladar. The readout chip consists of two 1 x 8 element arrays of high-gain amplifiers that convert the input photocurrent signal to a voltage signal appropriate for digitization. Each amplifier consists of a transimpedance input stage op amp followed by a voltage-gain op amp and output buffer. The input transimpedance stage is a CMOS operational amplifier designed for a transimpedance gain of almost 1 MΩ. The voltage amplifier of stage two, also an operational amplifier, is designed to provide additional gain of about 150. Test chips have been fabricated and are being tested. The initial measured transimpedance gain of the entire amplifier cell is 130 MΩ. We discuss the chip design, physical layout, and initial performance test results.

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Section: Introductionmentioning

confidence: 99%

High-gain 0.8-μm CMOS readout integrated circuit for FM/CW line-imaging ladar

2003

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“…Ladars can be pulsed-based such as direct TOF, flash ladars 1,2 , and range-gated cameras 3,4 , or modulation-based continuous wave methods by frequency (FMcw) 5,6 , amplitude (AMcw) [7][8][9][10][11][12] or random modulation (RMcw) 13,14 . Triangulation sensors also consist of several ranging techniques such as peak or edge position measurement on a detector as well as a variety of structured-light projections including striped 15,16 and fringe 17,18 patterns.…”

Section: Introductionmentioning

confidence: 99%

The complementary nature of triangulation and ladar technologies

2005

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3D ranging and imaging technology is generally divided into time-based (ladar) and position-based (triangulation) approaches. Traditionally ladar has been applied to long range, low precision applications and triangulation has been used for short range, high precision applications. Measurement speed and precision of both technologies have improved such that ladars are viable at shorter ranges and triangulation is viable at longer ranges. These improvements have produced an overlap of technologies for short to mid-range applications. This paper investigates the two sets of technologies to demonstrate their complementary nature particularly with respect to space and terrestrial applications such as vehicle inspection, navigation, collision avoidance, and rendezvous & docking.

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