Aaron G Chen

20060183242, Aug 17, 2006

Feb 14, 2005

11/057880

Wenxi Huang - Fremont CA, US
Aaron Chen - Irvine CA, US
Sarah Ngola - Sunnyvale CA, US
Kamen Voivodov - Hayward CA, US

Ciphergen Biosystems, Inc. - Fremont CA

G01N 31/22

436166000, 422056000

Polymers bearing metal chelating groups are readily prepared from easily accessible precursors. The polymers are readily converted to the corresponding metal chelates. The polymers can also include an energy absorbing moiety for use in matrix assisted laser desorption/ionization mass spectrometry. The polymer can also include a photo-curable group, which can be used to form cross-links within the bulk polymer or between the polymer and a surface functionalized with a polymerizable moiety. The polymers are incorporated into devices of use for the analysis, capture, separation, or purification of an analyte. In an exemplary embodiment, the invention provides a substrate coated with a polymer of the invention, the substrate being adapted for use as a probe for a mass spectrometer.

20210003681, Jan 7, 2021

Apr 6, 2020

16/841506

- San Jose CA, US
Stephen Nestinger - Fremont CA, US
Aaron Chen - Fremont CA, US

VELODYNE LIDAR, INC. - San Jose CA

G01S 7/487
G01S 17/10

Methods, apparatus, and systems related to light detection and ranging (LIDAR) are described. In one example aspect, a LIDAR apparatus includes a light emitter configured to generate, according to a first electrical pulse signal, a pulse light signal. The first electrical pulse signal comprises a first set of non-uniformly spaced pulses. The apparatus includes a receiver configured to convert returned light signals from the object into electrical signals and a filtering subsystem in communication with the receiver, configured to receive the electrical signals from the receiver and remove a point from a set of points representing at least a partial surface of the object as noise by determining whether there is a coherence between the point and corresponding neighboring points of the point along at least a first direction and a second direction of the set of points.

20200379094, Dec 3, 2020

Aug 6, 2020

16/987060

- San Jose CA, US
Rajanatha Shettigara - San Jose CA, US
Nathan Slattengren - San Francisco CA, US
Aaron Chen - Fremont CA, US
Anand Gopalan - Foster City CA, US

G01S 7/4863
G01S 17/89
G01S 7/497
G01S 17/06
G01S 7/484
G01S 17/42
G01S 7/481
G01S 7/486
G01S 7/4865
G01S 17/08

Methods and systems for combining return signals from multiple channels of a LIDAR measurement system are described herein. In one aspect, the outputs of multiple receive channels are electrically coupled before input to a single channel of an analog to digital converter. In another aspect, a DC offset voltage is provided at the output of each transimpedance amplifier of each receive channel to improve measured signal quality. In another aspect, a bias voltage supplied to each photodetector of each receive channel is adjusted based on measured temperature to save power and improve measurement consistency. In another aspect, a bias voltage supplied to each illumination source of each transmit channel is adjusted based on measured temperature. In another aspect, a multiplexer is employed to multiplex multiple sets of output signals of corresponding sets of receive channels before analog to digital conversion.

20190178992, Jun 13, 2019

Sep 18, 2018

16/134000

- Morgan Hill CA, US
Rajanatha Shettigara - San Jose CA, US
Nathan Slattengren - San Francisco CA, US
Aaron Chen - Fremont CA, US
Anand Gopalan - Foster City CA, US

G01S 7/486
G01S 17/89
G01S 17/08

Methods and systems for combining return signals from multiple channels of a LIDAR measurement system are described herein. In one aspect, the outputs of multiple receive channels are electrically coupled before input to a single channel of an analog to digital converter. In another aspect, a DC offset voltage is provided at the output of each transimpedance amplifier of each receive channel to improve measured signal quality. In another aspect, a bias voltage supplied to each photodetector of each receive channel is adjusted based on measured temperature to save power and improve measurement consistency. In another aspect, a bias voltage supplied to each illumination source of each transmit channel is adjusted based on measured temperature. In another aspect, a multiplexer is employed to multiplex multiple sets of output signals of corresponding sets of receive channels before analog to digital conversion.