Michael Chang

System For Measuring Distances In The Anterior Chamber Of The Eye

Application

#6631990 Oct 14, 2003

Filed

Dec 19, 2001

Inventor

Manfred A. Schippert (Chelmsford, MA) · Michael A. Chang (Weston, MA) · Oscar K. Hollander (Falmouth, MA) · Sheldon H. Moll (Bedford, MA)

Appl. No.

10/024851

Assignee

Acmed, Inc. (Bedford, MA)

International Classification

A61B 310

U.S. Classification

351214

Abstract

A measurement system is provided for measuring distances in the anterior chamber of an eye in conjunction with a slit lamp ophthalmologic microscope table. The measurement system includes a linearly movable interface assembly operative to pick up motions of the microscope assembly in a direction along an optical axis of the eye. A linear measurement assembly is coupled to the interface assembly and operative to determine a distance traveled by the interface. The measurement system may further be provided with a three-axis motion assembly and an optical microscope assembly mounted on the motion assembly. An image recording device is optically aligned with the optical microscope assembly to record images from the optical microscope assembly. A controller assembly is operative to control motion of the three-axis motion assembly in a first horizontal direction parallel to an optical axis of an eye of a patient, in a second horizontal direction orthogonal to the first horizontal direction to align the microscope assembly with both eyes, and in a vertical direction. The measurement system with image recording capability may be a stand-along system or incorporated for engagement and disengagement with an existing slit lamp table.

Claim

What is claimed is: 1. A measurement system for measuring distances in an anterior chamber of an eye in conjunction with a slit lamp ophthalmologic microscope assembly mounted on a slit lamp examination table, the measurement system comprising: a linearly movable interface assembly operative to pick up motions of the microscope assembly in a direction along an optical axis of the eye; and a linear measurement assembly coupled to the interface assembly and operative to determine a distance traveled by the interface assembly. 2. The measurement system of claim 1, wherein the interface assembly comprises a base fixable to the slit lamp examination table. 3. The measurement system of claim 1, wherein the base is removably fixable to the slit lamp examination table. 4. The measurement system of claim 1, wherein the base includes a clamping assembly configured to clamp to the slit lamp examination table. 5. The measurement system of claim 1, wherein the interface assembly is fixed to the slit lamp examination table. 6.

Accurate Tracking Of Coil Resistance

Application

#7009806 Mar 7, 2006

Filed

Feb 19, 2003

Inventor

Fernando A. Zayas (Loveland, CO) · Michael Chang (San Jose, CA)

Appl. No.

10/369314

Assignee

Matsushita Electric Industrial Co., Ltd. (Osaka)

International Classification

G11B 5/596

U.S. Classification

360 7804

Abstract

Methods and computer program products for determining accurate estimates of coil resistance are provided. Current differences between pairs of current values are determined. Additionally, voltage differences between pairs of actuator coil voltages (corresponding to the current values) are determined. Coil resistance is estimated based on the current differences and the voltage differences. These coil resistance estimates can be useful for accurately estimating actuator coil, actuator arm and/or head velocity.

Intelligent Blemish Control Algorithm And Apparatus

Application

#7199824 Apr 3, 2007

Filed

Aug 25, 2005

Inventor

Michael Chang (San Jose, CA) · Allan Yeh (San Jose, CA)

Appl. No.

11/212372

Assignee

ESS Technology, Inc. (Fremont, CA)

International Classification

H04N 9/64

U.S. Classification

348246

Abstract

An image processing method and apparatus is described for processing a signal from a monochrome or color sensor that may be subject to pixel defects or blemishes. Without prior knowledge of any pixel defects, the processing method examines each pixel value and its neighboring pixel values. A number of tests are applied to the set of pixel values to determine whether the underlying pixel is defective. If the underlying pixel is determined to be defective, the pixel value is replaced by an estimate value derived from the values of its neighboring pixels. Otherwise, the pixel value remains intact.

Controller, State Estimator And Methods For Use Therewith

Application

#7436617 Oct 14, 2008

Filed

Jun 21, 2006

Inventor

Michael Chang (San Jose, CA)

Appl. No.

11/472229

Assignee

Broadcom Corporation (Irvine, CA)

International Classification

G11B 21/02, G11B 5/596

U.S. Classification

360 75, 360 7704, 318560

Abstract

A controller is disclosed that can be used in controlling a drive device of a disk drive, or other systems, in the presence of sinusoidal disturbances. The controller includes a calibration module that generates a plurality of reference states for a reference region of a disk of the disk drive. An initialization state generation module generates a plurality of initialization states for at least one other region of the disk as a function of the plurality of reference states, a displacement between the other regions of the disk and the reference region of the disk, and a reference state transition matrix. A control module generates a control signal for the drive device based on the plurality of initialization states.

Peer-To-Peer Home Automation Management

Application

#8190275 May 29, 2012

Filed

Jun 22, 2009

Inventor

Michael Alan Chang (Saratoga, CA)

Appl. No.

12/489378

Assignee

Michael Alan Chang (Saratoga, CA)

International Classification

G05B 11/01, G06F 15/16

U.S. Classification

700 20, 700 19, 700 22, 700291, 700295, 709229

Abstract

A first home automation control device is configured to control a first electrical appliance and to communicate via a peer-to-peer network with a second home automation control device which is configured to control a second electrical appliance. When the first home automation control device discovers the presence of the second home automation control device, the first home automation control device negotiates with the second home automation control device to determine a goal. The first home automation control device and the second home automation control device then jointly execute a task to achieve the goal. The goal may be an energy savings goal.

1,3-Diaryl Cyclopentanes And Derivatives Thereof As Paf Antagonists

Application

#5132463 Jul 21, 1992

Filed

Jun 12, 1991

Inventor

Donald W. Graham (Mountainside, NJ) · John C. Chabala (Westfield, NJ) · Tesfaye Biftu (Parlin, NJ) · Michael N. Chang (Newtown, PA) · Yuan-Ching P. Chiang (Piscataway, NJ) · Shu S. Yang (Bridgewater, NJ) · Kathryn L. Thompson (Westfield, NJ)

Appl. No.

7/713895

Assignee

Merck & Co., Inc. (Rahway, NJ)

International Classification

C07C31714, C07C31722

U.S. Classification

568 33

Abstract

Novel 1,3-Diaryl cyclopentanes of the following general formula were prepared. ##STR1## These compounds were found to have potent and specific PAF (Platelet Activating Factor) antagonistic activities and as such useful in the treatment or amelioration of various diseases or disorders mediated by the PAF, for example, hypotension, inflammation, nephritis, stroke and other cardiovascular disorders, asthma, allergic and skin diseases, peptic or stomach ulcer, shock, lung edema, psoriasis, adult respiratory distress syndrome, pain including dental pain, and aggregation of platelets.