Mina F Farr

US Patent:

6611478, Aug 26, 2003

Filed:

Jun 30, 2000

Appl. No.:

09/608509

Inventors:

Mina Farr - Palo Alto CA

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G11B 700

US Classification:

369 4426, 369 4423

Abstract:

Apparatus is disclosed for recovering both a data signal and a clock signal from an optical disk, in which nonconfocal detection is used to recover the data signal and confocal detection is used to recover the clock signal. The clock signal is recorded at a frequency slightly higher than the highest frequency components of the data signal, so the clock signal is not incorporated into the signal recovered by the nonconfocal data detector. The data and clock signals thereby can be recovered simultaneously from the optical disk, using just a single laser beam and objective lens.

US Patent:

6778270, Aug 17, 2004

Filed:

Sep 13, 2002

Appl. No.:

10/243305

Inventors:

Mina Farr - Palo Alto CA

Assignee:

Finisar Corporation - Sunnyvale CA

International Classification:

G01J 314

US Classification:

356326, 356328

Abstract:

A holographic demultiplexor for filtering and spatially positioning individual optical channels, wavelengths, or sets of wavelengths. The holographic demultiplexor includes a volume hologram that includes holograms for redirecting wavelengths included in a light signal. A diffraction grating linearly disperses the light signal and the individual holograms included in the volume hologram spatially reflect the one or more wavelengths back to the diffraction grating as specific angles. The volume hologram spatially reflects the one or more wavelengths such that they are dispersed in two dimensions. The diffraction grating then reflects the two dimensionally dispersed wavelengths to a two dimensional detector array. The detectors of the detector array for adjacent wavelengths can be interleaved to reduce interference. Alternatively, the volume hologram can redirect sets of wavelengths directly to the detector array and the light is not linearly dispersed by a diffraction grating first.

US Patent:

6801325, Oct 5, 2004

Filed:

Jun 25, 2002

Appl. No.:

10/183976

Inventors:

Mina Farr - Palo Alto CA
Alan Petersen - Cupertino CA

Assignee:

Intuitive Surgical, Inc. - Sunnyvale CA

International Classification:

G01B 902

US Classification:

356520, 600117, 600111

Abstract:

Methods and devices for inspecting and calibrating a stereoscopic imaging device, such as a binocular endoscope. In one exemplary embodiment, the method of the present invention measures a fringe pattern from light emitted through two channels of the device. An angle of each of the fringe pattern can be measured so as to allow a diopter difference between the channels to be calculated.

US Patent:

6809772, Oct 26, 2004

Filed:

Oct 28, 1999

Appl. No.:

09/429416

Inventors:

Ricardo J Motta - Palo Alto CA
Mina Farr - Palo Alto CA

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

H04N 5225

US Classification:

348341, 348344, 348362, 396373, 396354

Abstract:

A shutterless digital camera includes an optical viewfinder having a pair of spaced apart mirrors for facilitating in one mode of operation through-the-lens viewing of an object image to be captured and for facilitating in the same one mode of operation through-the-lens display unit viewing of a captured object image. A mirror control system facilitates the moving of at least one of the mirrors to permit the object image to be captured and further facilitates the moving of at least the other one of the mirrors to permit display unit viewing of the captured object image. The method of using the shutterless digital camera includes passing object light indicative of the object image through a primary lens system and a secondary lens system to permit a user to view the object image prior to the object image being stored for reproduction purposes and subsequently passing display light indicative of the object image through the secondary lens system only to permit the user to view the object image subsequent to the object image being stored for reproduction purposes.

US Patent:

6817975, Nov 16, 2004

Filed:

Oct 12, 2000

Appl. No.:

09/689444

Inventors:

Mina Farr - Palo Alto CA
Wolfgang Braxmeier - Emmendingen, DE

Assignee:

Intuitive Surgical, Inc. - Mountain View CA

International Classification:

A61B 1002

US Classification:

600160, 600138, 600162, 600166, 359434

Abstract:

Improved optical devices and methods transmit optical images along elongate optical paths with relatively limited cross-sectional dimensions using an improved objective, relay, and ocular systems. In a first aspect, at least one intermediate image formed within an optical component, rather than being formed in a gap between optical components. In a preferred embodiment, a first intermediate image is formed within glass of the most proximal objective lens, with the first intermediate image extending axially along a curved image location within the glass. The last intermediate image may similarly be disposed within a distal lens of the ocular system. By making use of a first and/or last intermediate image disposed in this manner within a lens, endoscopes can exhibit a significantly larger Numerical Aperture than known endoscopes having similar cross-sectional dimensions. In a second aspect, the ocular system allows independent adjustment of diopters, magnification, X-Y positioning, and rotation orientation of the captured image while introducing minimal aberrations.

US Patent:

6841733, Jan 11, 2005

Filed:

Sep 4, 2003

Appl. No.:

10/654692

Inventors:

Stefano Schiaffino - Pleasanton CA, US
Giorgio Giaretta - Mountain View CA, US
Patrick Unold - Wolfratshausen, DE
Mina Farr - Palo Alto CA, US

Assignee:

Finisar Corporation - Sunnyvale CA

International Classification:

H01L 2302

US Classification:

174 525, 174 521, 361714, 361717

Abstract:

An improved monitoring and control system for a laser in a header assembly of a transmitter optical subassembly (“TOSA”) is disclosed. The monitoring and control system, includes one or more monitor photodiodes (“MPDs”), is positioned together with the laser on a component submount. The submount in turn is mated with a multi-layer platform (“MLP”) that forms part of the header assembly. The MLP hermetically extends through the header assembly to provide a plurality of electrical interconnects for the laser, MPD(s), and other submount components. In one embodiment, a single MPD is located proximate the laser to receive back facet laser light emission. Measurement of the back facet emission enables the MPD to determine laser intensity. In another embodiment, two MPDs are joined together to receive the back facet laser light emission. Comparison of each MPD's measurement enables the laser's wavelength to be determined and adjusted to optimize its performance.

US Patent:

6853767, Feb 8, 2005

Filed:

Apr 17, 2002

Appl. No.:

10/124232

Inventors:

Mina Farr - Palo Alto CA, US
Jan Lipson - Cupertino CA, US

Assignee:

Finisar Corporation - Sunnyvale CA

International Classification:

G02B006/32

US Classification:

385 33, 385147

Abstract:

Manufacturing coupling elements that have two or more ports. A focusing lens array is attached with a collimating lens array to form an element array such that each focusing lenslet is opposite a collimating lenslet. Optionally, an optical element such as a beam splitter is included between the focusing lens array and the collimating lens array. The individual coupling elements are then cut from the element array. After a row of coupling elements is cut or separated from the element array, a side of the exposed optical element can be polished and a third row of lenslets can be attached to the polished side of the optical element before the row is cut into individual coupling elements. This provides a third port to the coupling elements or optical transceivers.

US Patent:

6940593, Sep 6, 2005

Filed:

Apr 5, 2002

Appl. No.:

10/117278

Inventors:

Mina Farr - Palo Alto CA, US

Assignee:

Finisar Corporation - Sunnyvale CA

International Classification:

G01J003/28

US Classification:

356326, 356330

Abstract:

An optical reflection device for filtering and spatially positioning individual optical channels or wavelengths. The device includes a plurality of optical members with reflective surfaces and at least one reflective layer located on the reflective surface of each optical member. In addition, the plurality of optical members are interconnected in a manner such that the reflective surfaces are oriented at predetermined slopes with respect to one another. Each reflective layer is configured to reflect a particular wavelength or channel. The plurality of optical members are interconnected in a manner that allows each optical member to reflect an individual channel at a unique angle with respect to the other optical members. This configuration allows the optical reflection device to individually reflect and filter channels that are dispersed from some form of dispersing member, such as a prism or a diffraction grating.