Eric N Berseth

US Patent:

20080079945, Apr 3, 2008

Filed:

Oct 2, 2006

Appl. No.:

11/537836

Inventors:

John P. Flowers - San Jose CA, US
Alan B. Ray - Palo Alto CA, US
Eric N. Berseth - Santa Clara CA, US
Nhan T. Nguyen - San Jose CA, US

International Classification:

G01B 9/02

US Classification:

356450

Abstract:

A method and apparatus measures signal intensity and frequency of a laser reference signal over time to provide information regarding laser reference signal reliability.

US Patent:

20070239390, Oct 11, 2007

Filed:

Mar 28, 2006

Appl. No.:

11/390618

Inventors:

Janet Yun - Santa Clara CA, US
Eric Berseth - Santa Clara CA, US
Nhan Nguyen - San Jose CA, US
Haydee Trujillo - San Jose CA, US

International Classification:

G06F 19/00
G06F 7/40

US Classification:

702121000, 702108000

Abstract:

A measurement system and a method of configuring and gathering data are described.

US Patent:

20200064452, Feb 27, 2020

Filed:

Aug 24, 2018

Appl. No.:

16/112273

Inventors:

- San Jose CA, US
Eric Nathaniel BERSETH - Santa Clara CA, US

Assignee:

Velodyne LiDAR, Inc. - San Jose CA

International Classification:

G01S 7/487
G01S 17/93
G01S 7/48

Abstract:

Described herein are systems and methods for improving detection of multi-return light signals, and more particularly to the mitigation of optical crosstalk in a Light Detection And Ranging (LIDAR) system. The methods may include cycling a passive state, where the LIDAR system receives returns from other optical sources, and in an active state, where the LIDAR system receives returns from its laser firing and from the other optical sources. By comparing the returns from the passive state and active state, crosstalk from the other optical sources may be removed. Other methods may include (1) phase locking intra LIDAR systems to fire their laser in different directions from one another; and (2) when two inter LIDAR system are firing a laser beam at one another within a field of view threshold, each inter LIDAR system may ignore the signal return from the other inter LIDAR system.